1/31/14

Update 2/1- Snow Event & Amounts - February Picks Up Where January Left Off...More Snow (And Rain)

2/1/14
Snow Event and Snowfall Amounts

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Update...2/1/14 - 12 Noon
Radar  and surface observations indicate heaviest precipitation as of 12 noon aligning up from near Jackson...east northeast across Detroit's west and northwest suburbs into the northeast suburbs. Therefore; will drop the expected 4-8" snowfall band just slightly south of the Livingston/Washtenaw... Oakland/Wayne...Macomb/Wayne borders. These areas will see snow...sleet and possibly a bit of rain mixed in this afternoon before back to snow. The remainder of the region looks ok as is...
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1/31/14
With the calendar page barely turned and another storm is taking aim on the southern Great Lakes. While this storm is not a major one as far as intensity; it will have a good moisture supply to dump snow and mixed precipitation over Southeast Lower Michigan.

While some patchy light snow or snow showers may fall this evening; the heavier, continuous wet snow will overspread Southeast Lower Michigan during the early morning hours of Saturday. It will become mixed with a period of sleet and freezing rain before changing to rain over extreme Southeast Lower Michigan. Before the change; look for mainly 2" - 3" of snow over extreme Southeast Lower Michigan (Ann Arbor to Metro Detroit and points south) with pockets of 4" before the snow becomes mixed, or changes to rain. Further north from Detroit's northern suburbs up across Flint, Saginaw and the Thumb Region,  a heavy wet snow of 4" - 8" is likely to fall on Saturday.



After this weak system slides through; a weak high pressure will dominate into Tuesday. A more impressive low pressure and high pressure are slated to affect the region from mid week into next weekend. Early indication are a classic Ohio Valley low will deepen and gain strength and head northeast toward Ohio late Tuesday into Wednesday. This system will be mainly a snow system and how close she comes to Southeast Lower Michigan will determined how much snow falls over our region. Then; late in the week, the large cold high pressure will push into the Midwest.



More on these systems later...

Making weather fun while we all learn,
Bill Deedler -SEMI_WeatherHistorian




1/28/14

"A GREAT STORM IS UPON MICHIGAN" THE GREAT BLIZZARD OF 1978!

"A GREAT STORM IS UPON MICHIGAN"
THE GREAT BLIZZARD OF 1978!

Written by: William R. Deedler, Weather Historian - Southeast Lower MI

As with the huge snowstorm of December 1974 another even more powerful (in terms of intensity/extent) storm is of strong interest to all meteorologists who have studied winter storms in the Great Lakes. This storm is also of interest and remembrance to many longtime residents of the Great Lakes, the Upper Ohio Valley and Ontario, Canada who had to deal with winter's full fury late in January of 1978. In addition, the storm certainly casts many memories for those of us who were on duty and worked during the storm...while being in awe of the development and subsequent immense strength of this great monster. With the 36th anniversary of this Great Blizzard at hand, it is worth taking a step back in time to re-live this monumental example of nature's fury.

While there are several contenders for the worst blizzard ever to hit the Great Lakes in relatively modern times (since 1870 when records began in Detroit), the immense and intense Blizzard of January 26-27th 1978 must rank at or near the top along with the Great White Hurricane of 1913 with its similar track and powerfulness.

The incredible Blizzard of January 26-27th, 1978 evolved out of a winter that was infamous for cold and storms. The Winter of 1977-78 thus far had been one the coldest, since records began, in many areas from the Rockies eastward to the Appalachians. Mammoth blizzards occurred late in January and early February from the Midwest to the East Coast as strong Arctic plunges dove south into the country and met up with the warmer winds from the deep south. The winter of 1977-78 was similar to its predecessor (1976-77) in terms of cold. The main difference between the two winters, however, came in February. In 1977, temperatures moderated rapidly during February, while in 1978, the cold actually worsened - with several locations reporting their coldest recorded February to date. The Winter of 1977-78 is written down in the record books as Detroit's seventh coldest winter, Flint's fifth coldest and Saginaw's sixth. West of the Rockies, it was a different story as a dominant upper ridge of high pressure provided a relatively mild winter, with some stations even reporting one of their warmest winters on record.

The Great Storm

Since there were some forecasted variances of the intensity and track of the storm, and considering the primitive model of the day (LFM - Limited Fine Mesh), forecasters did an admirable job in forecasting one of the most severe winter storms ever to hit the Great Lakes Region.

A Winter Storm Watch was posted as early as Tuesday night, the 24th, for the southern half of the Lower Peninsula for Wednesday Night into Thursday. Gale Warnings for the Great Lakes were hoisted the following Wednesday morning, along with the Watch. A weaker system had moved through the region earlier during the day on Tuesday and already dropped some snow on the region (a Winter Storm Watch had been issued for this system as well, earlier on Monday, the 23rd). After Tuesday's snow, the headline on the Special Weather Statement that was issued by the NWS Tuesday evening read as follows: "Another Winter Storm Threatens Lower Michigan" and thus, a second Winter Storm Watch was officially posted.

Meanwhile, the ingredients of what would later prove to be a truly fascinating yet vicious winter storm were coming together from different parts of the country. As with the "White Hurricane of 1913," the massive storm actually began as two smaller but distinct storms. A strong low pressure with an attending arctic air mass was entering the Northern Plains by way of Northern Minnesota on Tuesday evening (24th). At the same time, another developing low pressure system was taking shape over the eastern Texas/Louisiana area.

The phasing of two distinct jet streams aloft proved to be the key as to the subsequent strength and massive extent of the storm. A very strong and energetic Arctic impulse surged almost due south and plowed the Arctic front through the Northern Plains late on the 24th. At the same time, another very strong upper wind impulse surged south through southern Arizona. These two jet streaks made up the larger North American jet stream as a huge upper ridge of high pressure along the West Coast of the U.S. diverted the powerful Pacific Jet north into Northern Canada. This northern jet (containing a wind max of 110 knots) then dove due south, like on a giant roller coaster, across the western U.S. as the second, subtropical jet (with an even stronger wind max of 130 knots) surged across southwestern states. On Wednesday (25th), a deepening area of low pressure made its way east across the Gulf States into Georgia by evening (surface | 500mb). Meanwhile, across the north, the Arctic front barreled east across the Upper Midwest into the Western Lakes by Wednesday evening.

Earlier that Wednesday morning, the Winter Storm Watch for Southeast Lower Michigan was changed to a Heavy Snow Warning, while a Travelers Advisory was issued for Western and Northern Lower Peninsula. Later, at the issuance of the evening forecast, the entire Lower Peninsula was upgraded to a Heavy Snow Warning. Meanwhile, a rapid deepening of the surface low over the southeast portion of the country also commenced on Wednesday evening. As the low intensified over Alabama and Georgia, Atlanta registered its lowest barometric pressure ever late on the 25th. At the same time, further north in Michigan, snow was falling over much of the Lower Peninsula. In and around the Ann Arbor and Metro Detroit, the snow mixed with or changed to light rain Wednesday night as slightly warmer air surged northwest 500mb chart, 00z January 26th, 1978; click to enlarge into that area ahead of the deepening storm. While the storm was organizing in the lower levels of the atmosphere over Georgia, the Subtropical and Arctic jet aloft began to merge and phase over the Southeast part of the country. This merging of jet streaks contained a wind max of 150 knots which helped induce a rapid intensification of the Georgia Low as it surged northward into West Virginia early on the 26th. Record low barometric pressures were set all along its path as an ominous track (trough) began to materialize toward the Eastern Great Lakes.

Bands of heavier snow spread north into much of Southern Lower Michigan during the very early morning hours of the 26th. Rain continued to fall, however, over the extreme southeast corner of Lower Michigan. At 1 AM EST, rain was observed at Detroit Metro Airport with the temperature comfortably above freezing at 36 degrees. Further north at Flint, however, sleet and freezing rain were falling as the temperature hovered around freezing. Air pressure tendencies were noted as falling rapidly /PRESFR/ and continued that way for several hours (in fact, several stations in this storms path had to re-adjust their barographs for station pressures traces that were BELOW initial chart scale).
The aforementioned Arctic cold front that was across the Western Great Lakes advanced steadily east into Lower Michigan as the main southern low underwent explosive deepening (this low's central pressure fell 40 millibars in 24 hours)! The central pressure was recorded at 28.28 inches as it tracked north across eastern Ohio, just west of Cleveland, at 7AM EST. As the low moved out over Lake Erie, the Arctic cold front over Southeast Lower Michigan was pulled sharply east into it's mammoth cyclonic circulation. Any residual rain over Southeast Lower Michigan quickly changed to heavy snow and blowing snow during the pre- dawn hours of the 26th. As the Arctic front plowed through the Cleveland area, the wind gusted to an incredible 82 mph! As the Arctic air flooded the Cleveland area, the temperature dropped from a relatively balmy 44 degrees at 4AM EST to a bitterly cold 7 degrees by 1000 AM EST.

Blizzard Warnings were hoisted across much of the Great Lakes and Upper Ohio Valley Region by daybreak Thursday. The center of the huge storm (surface | 500mb) continued to trek north northwest across Southwest Ontario (roughly between Chatham and London) while Detroit measured its lowest pressure reading at 28.34 inches at 650 AM EST. The incredibly deep center made its way north along the St. Clair River with Sarnia ON reporting the lowest pressure on land at 28.21 inches. Not only was the depth of this mammoth storm's center very impressive, so too was the extent of low pressure from its center. Even locations that were far removed from the storm's center also reported record low pressures. Stations such as Cincinnati OH, Rochester NY and Toronto ON and even as far east as Wilmington N.C., all recorded record low pressure readings from this monster. In fact, at Toronto, where records go back as far back as 1840, the lowest pressure reading of 28.40 inches broke the old record of 28.57 inches by 0.17 inches. In addition, dozens of other cities, with records going back a century, also recorded their lowest pressure reading of all time or, for at least the month of January. This massively intense storm was responsible for strong wind gusts as far away from the center as Boston /72 MPH/ and Chesapeake Bay Bridge /90 MPH/ with even damaging winds reported as far south as Tallahassee FL.

As the Arctic air circulated throughout the storm while it made its way over Lake Huron, the lowest pressure was reached around 950 millibars or a hurricane-like 28.05 inches! "A Great Storm is Upon Michigan" read the headline of the 800 AM EST Special Weather Statement issued by the National Weather Service Forecast Office in Ann Arbor that Thursday /26th/ morning. Heavy snow and blizzard conditions were extensive as wind gusts in excess of 35 mph whipped the snow into huge drifts across much of Southeast Lower Michigan. Other areas of Eastern Michigan, Indiana and Ohio reported near hurricane-force winds, heavy snow and temperatures hovering between zero and 10 above, resulting in extreme blizzard conditions. These conditions later expanded further east into Pennsylvania and West Virginia and prevailed into the night (26-27th) across much of the Eastern Great Lakes, Southern Ontario and the Upper Ohio Valley. With the storm generating copious amounts of snow and very strong winds, whiteout conditions were widespread. All land and air traffic came to a stand still in the affected regions. Several major roads were closed for at least two to three days, if not longer, while clean up got underway. Numerous NWS employees were stranded at work, home, or on the road somewhere between the two. Several employees worked double shifts into at least Friday (some longer) because of the impassable roads with others simply unable to get to work.
The Blizzard Warnings were allowed to die across Michigan during the forenoon hours of Friday, the 27th. Record 24 hour snowfall totals from the storm included, 16.1 inches at Grand Rapids, 15.4 inches at Houghton Lake and 12.2 at Dayton, OH. Snowfalls for the entire storm (25-27th) included a whopping 30.0 inches at Muskegon (some of which was Lake Michigan enhanced), 19.3 inches at Lansing and 19.2 at Grand Rapids. Snowfalls were less over Southeast Lower Michigan (mainly because of the rain that fell for a period) and included 9.9 inches at Flint and 8.2 inches at Detroit.
The following is a quote from the summary written about the storm by Meteorologist in Charge, C.R. Snider on January 30th, 1978 at the National Weather Service Ann Arbor:
"The most extensive and very nearly the most severe blizzard in Michigan history raged throughout Thursday January 26, 1978 and into part of Friday January 27. About 20 people died as a direct or indirect result of the storm, most due to heart attacks or traffic accidents. At least one person died of exposure in a stranded automobile. Many were hospitalized for exposure, mostly from homes that lost power and heat. About 100,000 cars were abandoned on Michigan highways, most of them in the southeast part of the state."
The employees of the National Weather Service Forecast Office in Ann Arbor had just set up shop at the new quarters at the Ann Arbor Federal Building a WEEK before the storm hit. The forecast staff had transferred from the Detroit Metropolitan Airport Office while the observing and radar staff remained at the airport. The majority of employees still lived in and around the metro Detroit area and all major roads between Detroit and Ann Arbor were blocked for approximately 18 hours due to the storm. Several employees put forth efforts beyond the call of duty, stated Mr. Snider in his storm report.

Yet, as mentioned earlier, the Winter was not yet over by any means as the month of February (after the storm) was brutally cold across much of country. The below normal temperature departures of February 1978 were strikingly similar to that of January 1978 (and in some places, February was actually colder). The average temperature for Detroit that winter came in at just 20.5 degrees /normal 27.1/ which again, made it the seventh coldest winter on record. Snowfall totaled a hefty 61.7 inches which made the winter of 1977-78 the eighth snowiest winter on record at Detroit. Flint's average temperature of 19.1 degrees made it the fifth coldest winter on record, but Flint received less snow than Detroit with 50.6 inches /19th snowiest/. Saginaw's winter average temperature of 17.9 degrees made it the sixth coldest winter on record and was accompanied by 55.6 inches of snow, making it the just the 20th snowiest winter.

1/22/14

Update - 1/25/2014 - Waves of Arctic Air and Snow to Continue To Barrage the Great Lakes and Southeast Lower Michigan!

Update 1/25/2014 Noon - Temperature Roller Coaster To Gin Up More Snow and Blustery Conditions!

After temperatures "popped" into the mid 20s Saturday morning; cold air advection is on the move and will overspread Southeast Lower Michigan on gusty northwest winds throughout this Saturday afternoon and night. Look for readings to drop around zero and below overnight Saturday into Sunday morn.

Our fast moving clipper over Saskatchewan in Southwest Canada is on course to sail southeast across the snow-laden landscape into Northern Illinois and is projected to be near Chicago by the late morning hours of Sunday. Meanwhile; another plunge of Arctic air will organize over the Dakotas and dive into the Western Lakes system during the day, Sunday.  Ahead of this system; another brief period of moderating air will help Sunday's temperatures climb into the 20 to 25 degree range Sunday. This entire system will bring another 1 - 3" of snow and blustery conditions over Southeast Lower Michigan Sunday and Sunday evening before the colder Arctic air, once again overspreads our region Sunday night into Monday. Wind chills will lower below zero again overnight and then Sunday night into Tuesday.




Looking ahead; several days of high temperatures in the single figures to teens and overnight lows around zero and below are likely at least into mid week. Ground Hog Day is next weekend on Sunday 2/2/14.... Hmmm.

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1/22/2014
More and more information is unfolding about the onslaught of waves of fresh, bitter cold Arctic air and it's impacts across the eastern US into next week.

As mentioned in yesterday's blog, the first (in a series) of Arctic plunges is on track to engulf the region Saturday. This air mass will basically replace the bone-chilling cold already in place (and also seen this earlier this month) with a freshly stored batch of Arctic chill but the transition will also be accompanied by bitter cold dangerous wind chills.

As the first wave of Arctic air approaches Friday; strong and gusty southwest to west winds of 18 to 28 mph with gusts up to 35 to 40 mph will herald it's delivery by creating wind chills of -10 to -30; even as temperatures slowly moderate by rising through the teens and into the lower to mid 20s by early Saturday morning. Then by Saturday afternoon; look for the Arctic front to sweep through Southeast Lower Michigan and the temperature roller-coaster dives back down to around zero or below by Sunday morning. Widespread blustery snow, snow showers and blowing snow will accompany this interchanging of air masses with the first wave of snow accumulations though Saturday, mainly 1" to 3" of snow with locally higher amounts due to Lake Effect snow.




Latest indications are now a new Alberta Clipper Low pressure system will dive quickly southeast along the perimeter of the freshly laid Arctic air mass hovering across the southern Great Lakes on Sunday. Initially; all models are indicating the dynamics with this system and available moisture available from the south will contribute to bring more accumulating snow on Sunday. Of course this being so far out; the exact track and amounts of snow are questionable, therefore I'll update as this potential snow making system is bettered sampled with upper air soundings. The last two maps are estimates of the low's track and intensity. It's almost a certainty that this January will be the snowiest on record for Detroit and possibly Flint; especially if the Alberta Clipper on Sunday holds true to form.




After the Clipper blows through Sunday, the Arctic air will remain over the region in its wake well into the work week with yet another clipper possible later in the week.  Bundle Up!

 Making weather fun while we all learn,
 Bill Deedler -SEMI_WeatherHistorian



1/21/14

Powerful Arctic Vortex To Blast The Region Once Again This Weekend!

As mentioned in my last blog; round two of a very similar Arctic air mass to the one earlier this month is slated to plow south into the Great Lakes this weekend and hold over the region well into next week. This bitter Arctic air, straight out of the Polar region and directed by another intense Arctic vortex, will drive due south into the Great Lakes and Southeast Lower Michigan on Saturday. The cold in this air mass should be similar to one experienced back earlier in the month on the 6th through the 8th when temperatures plunged below zero across the region.

What will make this air mass change especially dangerous will be the wind chills created by very strong southwest to west winds that will blow in advance of the Arctic front itself on Friday; this in spite of the warmer air moderation ahead of the Arctic front passage during Saturday. Then, the sharp, bitter colder strong north winds pushing across the land behind it on Saturday into Sunday!  A powerful low pressure system will spin up along Arctic air mass and drive snow and snow squalls along with considerable blowing snow on Friday into Saturday as it approaches. Depending on the atmosphere and wind trajectory Saturday,  snow squalls off the Lakes could be quite aggressive.

More as this system develops and particulars become more evident...



Making weather fun while we all learn,
Bill Deedler -SEMI_WeatherHistorian


1/17/14

Best Winter Analogue Thus Far; 1981-82...a Closer Look at January Then and Now

As reported in my last blog there in my original analogue set for the Metro Detroit area there were an overwhelming number of analogues that projected a cold winter this go-around for the Winter of 2013-14. As seen below in Fig -1; there were 13 of the original 16 that projected temperatures more than a degree below normal. An extra-ordinary amount when you consider 82% of the selected analogue winters warned of a cold winter. Such a strong signal that I stated; "I can't go against a cold signal this strong and dominant nor from what I'm seeing this fall, therefore below normal it is". 
                                                                                         Fig -1

Then; studying the best performers, I narrowed it down to 5 - 8 analogues that had did a good to great job in projecting December's temperatures for all three cities.

                                                                                            Fig - 2


Finally; up through mid January for the first half of the meteorological winter using Detroit's analogues (largest data set), I narrowed it to six of the eight analogues above (in Fig 3) that projected the first half of the winter best (granted the second half of January is yet to play out - and more on that shortly).


                                                                                          Fig - 3


As the winter plays out, I suspect more cold analogues will step aside revealing the analogues that best performed for the entire winter as far as cold and snow. Remember; these analogues are used only as guidance as NO two winters are ever exactly alike. Think of these majority of players (in the first case; cold and second case; cold & normal to above snow) pointing the direction the upcoming winter is liable to unfold. And in that task, they have done exceedingly well so far into mid winter, one that has performed very well in regard to cold and above normal snow especially in January thus far; 1982...

National View


































































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Note the blocking pattern in the polar arena over Alaska extending south over the far eastern Pacific and east across the Pole to Greenland in January 1982. In addition, ridging along the West Coast helped deliver the cold across mainly two-thirds of the country. This has been the same similar blocking in the high latitudes that delivered this January's brutal cold wave recently. Back in 1982, the cold came in mainly two brutal waves with dangerous cold and wind chills. Many might remember the weekend of the Super Bowl here in Metro Detroit. From Wikipedia;

The game was played on January 24, 1982, at the Pontiac Silverdome in Pontiac, Michigan, a suburb of Detroit. It marked the first time that a Super Bowl was held at a cold-weather city. The domed stadium saved the crowd at the game from the very cold and snowy weather, but the weather did affect traffic and other logistical issues related to the game. 

Also note the preceding weekend in January and even much later in April;



  •       A brutal cold snap sends temperatures to all-time record lows in dozens of cities throughout             the Midwestern United States.
    • Cold Sunday was a meteorological event which took place on January 17 when unprecedentedly cold air swept down from Canada and plunged temperatures across much of the United States far below existing all-time record lows.
    • On April 6 - A blizzard unprecedented in size for April dumps 1-2 feet of snow on the northeastern U.S., closing schools and businesses, snarling traffic, and canceling several major league baseball games.

  • Finallly; check out Detroit's Local Climatic Data from January 1982 and compare it to this January thus far. I remember January of '82 well; the cold combined with the bitter wind chills are in the blue shaded areas, much like we just experienced earlier this January. An important note about January 1982, the cold waves came down in two mammoth plunges with a third "weaker" plunge on Superbowl weekend. In addition; just like this January, the month wasn't always cold. The mildest week actually occurred the first week (pink shades) of the month, not mid-month like this January - which is more typical of a January Thaw. Another difference; snowfalls during January 1982 were mainly light and scattered before the big dump at the close, which brought the snow total up to 20 inches even. This January, several snow events have already brought more snow /26"/ than in 1982.

    Again, remember what I stated earlier - no two months are exactly alike but when you look a little closer, you might see mom nature may be re-running an old show with different players and timing.

    Oh, and what about that second bitter cold plunge that occurred January 1982, is that going to be "re-run" too?



    I'm glad you asked because it is looking more and more a certainly as the giant Arctic refrigerator has been recharging for yet another bitter cold onslaught. Also at this mid-winter time; I'll update any part of the Outlook if need be; so come back to my blog soon.
     
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    000
    CXUS53 KDTX 160800
    CF6DTW
    PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)
    
                                              STATION:   DETROIT MI
                                              MONTH:     JANUARY
                                              YEAR:      2014
                                              LATITUDE:   42 13 N
                                              LONGITUDE:  83 20 W
    
      TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND
    ================================================================================
    1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                         12Z  AVG MX 2MIN
    DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
    ================================================================================
    
     1  17  11  14 -12  51   0 0.30  6.4    3  8.5 16  20   M    M  10 1      28  80
     2  15   4  10 -16  55   0 0.16  4.4   10 15.7 25 360   M    M  10 19     32 360
     3  12  -5   4 -22  61   0    T    T    8  8.7 17 170   M    M   4        23 160
     4  31  10  21  -5  44   0    T    T    8 14.2 29 200   M    M   7        36 200
     5  32  20  26   0  39   0 0.90 10.2    8  7.2 23 320   M    M  10 12     30 320
     6  20 -14   3 -23  62   0 0.06  0.8   16 21.2 32 230   M    M   8 189    38 230
     7  -1 -14  -7 -33  72   0 0.00  0.0   16 18.9 26 210   M    M   4        32 220
     8  16  -7   5 -21  60   0    T    T   15  7.3 16 210   M    M   8 18     17 210
     9  22  -4   9 -17  56   0 0.03  0.6   14  2.3  8 120   M    M   8 18     14 350
    10  38  22  30   4  35   0 0.35  0.1   13  6.0 13 170   M    M  10 12     16 110
    11  42  34  38  12  27   0 0.23  0.0   10 12.8 28 230   M    M  10 12     33 250
    12  37  33  35  10  30   0 0.00  0.0    7 13.2 21 200   M    M   8        29 260
    13  45  34  40  15  25   0 0.00  0.0    5 12.3 22 200   M    M   7        29 200
    14  39  25  32   7  33   0    T    T    4  9.6 29 210   M    M   7 8      37 220
    15  31  21  26   1  39   0    T    T    4 15.7 29 200   M    M  10        38 200
    ================================================================================
    SM  396  170       689   0  2.03    22.5 173.6          M      121
    ================================================================================
    AV 26.4 11.3                              11.6 FASTST   M    M   8    MAX(MPH)
                                     MISC ---->  # 32 230               # 38  230
    ================================================================================
    NOTES:
    # LAST OF SEVERAL OCCURRENCES
    
    COLUMN 17 PEAK WIND IN M.P.H.
    
    PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2
    
                                              STATION:  DETROIT MI
                                              MONTH:    JANUARY
                                              YEAR:     2014
                                              LATITUDE:   42 13 N
                                              LONGITUDE:  83 20 W
    
    [TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16
    
    AVERAGE MONTHLY: 18.9   TOTAL FOR MONTH:   2.03    1 = FOG OR MIST
    DPTR FM NORMAL:  -6.9   DPTR FM NORMAL:    1.02    2 = FOG REDUCING VISIBILITY
    HIGHEST:    45 ON 13    GRTST 24HR  0.90 ON  5- 5      TO 1/4 MILE OR LESS
    LOWEST:    -14 ON  7, 6                            3 = THUNDER
                            SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                            TOTAL MONTH:  22.5 INCHES  5 = HAIL
                            GRTST 24HR  10.2 ON   M    6 = FREEZING RAIN OR DRIZZLE
                            GRTST DEPTH:  16 ON  7, 6  7 = DUSTSTORM OR SANDSTORM:
                                                           VSBY 1/2 MILE OR LESS
                                                       8 = SMOKE OR HAZE
    [NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW
                                                       X = TORNADO
    MAX 32 OR BELOW:  10    0.01 INCH OR MORE:   7
    MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5
    MIN 32 OR BELOW:  12    0.50 INCH OR MORE:   1
    MIN  0 OR BELOW:   5    1.00 INCH OR MORE:   0
    
    [HDD (BASE 65) ]
    TOTAL THIS MO.   689    CLEAR  (SCALE 0-3)   0
    DPTR FM NORMAL    99    PTCLDY (SCALE 4-7)   9
    TOTAL FM JUL 1  3168    CLOUDY (SCALE 8-10)  6
    DPTR FM NORMAL   281

    Making weather fun while we all learn,
    Bill Deedler -SEMI_WeatherHistorian

    1/3/14

    Update 1/6/14 - Snowfall Totals from Major Winter Snowstorm; January 4th-5th, 2014

    Update 1/6/2014 - 5PM
     

    Snowfall Totals from January 4th-5th, 2014

    Snowfall Totals from  January 4th-5th, 2014
    PUBLIC INFORMATION STATEMENT...STORM TOTALS
    NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
    1056 AM EST MON JAN 6 2014
    
    
    STORM TOTAL SNOW REPORTS
    
    LOCATION                  SNOWFALL     DURATION
                              (INCHES)      (HOURS)        LAT       LON
    
    ...BAY COUNTY...
       PINCONNING              M   5.0           30     43.86N    83.96W
       NE BAY CITY             M   7.0           30     43.59N    83.89W
    
    ...GENESEE COUNTY...
       GOODRICH                M  11.8           30     42.92N    83.51W
       4 N BURTON              M  13.2           30     43.05N    83.62W
       1 SE GRAND BLANC        M  13.9           30     42.92N    83.60W
       FLUSHING                M  14.5           30     43.06N    83.84W
       LINDEN                  M  16.0           30     42.82N    83.78W
       FLINT                   M  17.1           30     43.02N    83.69W
       2 W SWARTZ CREEK        M  18.0           30     42.96N    83.87W
    
    ...HURON COUNTY...
       PORT AUSTIN             M   5.0           30     44.04N    83.00W
       BAD AXE                 M   5.2           30     43.80N    83.00W
       GRINDSTONE CITY         M   7.5           30     44.05N    82.90W
       PORT HOPE               M  13.4           30     43.94N    82.72W
    
    ...LAPEER COUNTY...
       4 W LAPEER              M  16.5           30     43.05N    83.40W
       NORTH BRANCH            M  17.0           30     43.23N    83.19W
    
    ...LENAWEE COUNTY...
       6 ENE ADRIAN            M   8.0           30     41.93N    83.94W
       ADRIAN                  M   8.0           12     41.90N    84.04W
       2 WNW TIPTON            M   8.9           30     42.03N    84.10W
       MORENCI                 M  12.0           30     41.72N    84.22W
    
    ...LIVINGSTON COUNTY...
       3 NW PINCKNEY           M  11.7           30     42.49N    83.99W
       WHITMORE LAKE           M  13.0           30     42.43N    83.75W
       HOWELL                  M  14.0           30     42.61N    83.94W
       HOWELL                  M  15.9           30     42.61N    83.94W
       2 W FOWLERVILLE         M  17.5           30     42.66N    84.11W
    
    ...MACOMB COUNTY...
       MOUNT CLEMENS           M   6.5           24     42.60N    82.88W
       CENTER LINE             M   7.5           30     42.48N    83.03W
       4 NNW RICHMOND          M   8.5           30     42.86N    82.78W
       SSE NEW BALTIMORE       M   9.8           30     42.68N    82.74W
       UTICA                   M  10.0           30     42.63N    83.02W
       1 NNW UTICA             M  10.5           30     42.64N    83.03W
       SHELBY TOWNSHIP         M  11.0           30     42.67N    83.03W
    
    ...MIDLAND COUNTY...
       2 ENE MIDLAND           M   5.2           30     43.63N    84.19W
       MIDLAND                 M   6.0           30     43.62N    84.23W
    
    ...MONROE COUNTY...
       3 SE NEWPORT            M   8.6           30     41.97N    83.27W
       MONROE                  M   8.9           30     41.92N    83.39W
       4 SSE NEWPORT           M   9.6           30     41.95N    83.28W
       MONROE                  M   9.8           30     41.92N    83.39W
       DUNDEE                  M  10.0           30     41.96N    83.66W
       TEMPERANCE              M  11.0            M     41.77N    83.57W
       CARLETON                M  13.0           30     42.06N    83.39W
    
    ...OAKLAND COUNTY...
       FARMINGTON              M   6.7           30     42.46N    83.38W
       2 N FERNDALE            M   7.1           30     42.49N    83.13W
       FARMINGTON HILLS        M   8.1           30     42.49N    83.38W
       3 SW BLOOMFIELD HILLS   M   8.5           30     42.55N    83.29W
       PONTIAC                 M   9.1           30     42.65N    83.29W
       E WHITE LAKE            M   9.9           30     42.65N    83.50W
       5 N ROCHESTER           M  11.1           30     42.76N    83.12W
       CLARKSTON               M  12.0           30     42.74N    83.42W
       4 SSE LAKE ORION        M  12.9           30     42.73N    83.21W
       FARMINGTON HILLS        M  13.2           30     42.49N    83.38W
       WATERFORD               M  14.5           30     42.66N    83.39W
       4 E WHITE LAKE          M  14.6           30     42.65N    83.43W
       CLARKSTON               M  15.3           30     42.74N    83.42W
    
    ...SAGINAW COUNTY...
       5 S MERRILL             M   6.8           30     43.34N    84.34W
       FREELAND                M   8.3           30     43.52N    84.12W
       3 NW SAGINAW            M   8.4           30     43.45N    83.99W
       2 E FREELAND            M   8.8           30     43.52N    84.08W
       BRIDGEPORT              M   9.3           30     43.38N    83.88W
       HEMLOCK                 M  10.5           30     43.42N    84.23W
       3 ESE BIRCH RUN         M  11.0           24     43.23N    83.74W
    
    ...SANILAC COUNTY...
       LEXINGTON               M   9.7           30     43.27N    82.53W
       SANDUSKY                M  13.0           30     43.42N    82.83W
       2 W PECK                M  16.0           30     43.26N    82.86W
    
    ...SHIAWASSEE COUNTY...
       CORUNNA                 M  16.4           30     42.98N    84.12W
       OWOSSO                  M  18.7           30     43.00N    84.18W
    
    ...ST. CLAIR COUNTY...
       2 W PORT HURON          M  10.6           30     42.99N    82.47W
       ALGONAC                 M  10.6           30     42.62N    82.53W
       GOODELLS                M  11.0           30     42.98N    82.68W
       FORT GRATIOT            M  13.0            M     43.01N    82.43W
    
    ...TUSCOLA COUNTY...
       CARO                    M   9.9           30     43.49N    83.40W
       3 E DEFORD              M  14.0           30     43.52N    83.13W
       MILLINGTON              M  16.0           30     43.28N    83.53W
    
    ...WASHTENAW COUNTY...
       MILAN                   M   8.0           30     42.09N    83.68W
       CHELSEA                 M   9.5           30     42.31N    84.02W
       2 WNW ANN ARBOR         M  10.0           30     42.29N    83.77W
       SALINE                  M  10.2           30     42.18N    83.78W
       SE ANN ARBOR            M  10.3           30     42.28N    83.73W
       ANN ARBOR               M  10.4           30     42.28N    83.73W
       DEXTER                  M  11.7           30     42.33N    83.88W
       ENE DEXTER              M  12.0           30     42.33N    83.88W
       CHELSEA                 M  14.0           30     42.31N    84.02W
    
    ...WAYNE COUNTY...
       GROSSE POINTE           M   7.6           30     42.39N    82.91W
       4 NE DEARBORN           M   7.8           30     42.35N    83.16W
       LIVONIA                 M   8.0           30     42.40N    83.37W
       2 NNW LIVONIA           M   8.4           30     42.42N    83.39W
       N LIVONIA               M   8.4           30     42.40N    83.37W
       GARDEN CITY             M   9.4            M     42.33N    83.33W
       BROWNSTOWN TOWNSHIP     M   9.5           30     42.15N    83.26W
       WYANDOTTE               M   9.9           30     42.21N    83.16W
       RIVERVIEW               M  10.5           30     42.17N    83.19W
       ROMULUS                 M  10.6           30     42.22N    83.37W
    
    
    M = MEASURED
    E = ESTIMATED
    
    _____________________________________________________________________________________________

    Update 1/5/2014 - 1230 PM

    Major Winter Storm and Associated Arctic Blast on Schedule!

    Little change in previous thoughts on this major winter storm (see previous blogs). One earlier statement remains especially valid "I expect the storm to be one of the more memorable ones (if not most) this winter because of the combination of snow and bitter cold strong winds on the backside."

    No change in basic snowfall amounts"(8"- 12" and locally higher)" with the locally higher part not locally but more areas of 12" - 16" due to the heavier snow band that fell overnight due to overrunning moisture that generated the snow. Totals of  3" to as much as 7"snow fell mainly over central and portions of northern Southeast Lower Michigan; mainly from the 696/I-96 corridor northward across the Saginaw Valley and portions of the Thumb.

    Strong Arctic winds feeding the system will commence overnight Sunday and be in full force Monday. Considerable blowing and drifting snow will cause near blizzard or blizzard conditions at times on Monday. Temperatures will plunge down to between -10 to + 5 by Monday afternoon with wind chills of -20 to as low as near -40!

    ________________________________________________________________________________________
    Update 1/4/2014 - 1230PM; Latest model reviews and Storm Outlook

    Dangerous Bitter Cold Storm to Impact Southeast Lower Michigan Sunday Into Monday!

    Models continue to vary a bit but general consensus is for a major storm across the areas mentioned in last blog below.

    Set up continues to be quite interesting as far as how much phasing will come together over the eastern Great Lakes. This mornings US guidance now shows the NAM deepening her a bit more as she naturally veers the track to the northwest to compensate for the intensification. This is roughly between yesterday afternoon's UK /British model fig 2/ and this morning's GFS. It's interesting to note the latest British model /00z-UK/ veered her track back east toward Eastern Ohio/West Pennsylvania - got to love these models! Overnight's /00z/ European  is pretty much siding with her sister /UK/ and moving the low center over Eastern Ohio/West Penn.

    I like a track closer to NAM given the strong dynamics that will feed the storm BUT the question is (and like mentioned yesterday), when?  Looking at data now available, I prefer a track/pressure between the NAM (fig -1) and 00z Euro/UK until she rides just northeast of Southeast Lower Michigan in Ontario where she'll rev-up quicker. This would take the center between Sandusky Ohio and Cleveland over Lake Erie to west of Toronto (or the ending of track 3 on my Winter Outlook, over the Eastern Great lakes fig -2).

    FIG - 1


     FIG - 2

    Snowfalls from cold front that slides down Southeast Lower Michigan and storm moving up the Ohio Valley generally will range from 8" - 12" (locally higher) by Monday afternoon. Strong Arctic winds feeding the system will commence overnight Sunday and be in full force Monday. Considerable blowing and drifting snow will cause near blizzard or blizzard conditions at times on Monday. Temperatures will plunge down to between -10 to + 5 by Monday afternoon with wind chills of -20 to as low as near -40!

    -Latest Canadian just in sides closer to NAM with center over northwest Ohio Sunday night.

    Stay Tuned for further updates 'cause it's gonna be a bumpy ride the beginning to the first week of the new year!


    Making weather fun while we all learn,
    Bill Deedler -SEMI_WeatherHistorian

    __________________________________________________________________________________________
    1/3/14
    As mentioned in my last blog; it's been a while since Southeast Lower Michigan has seen such bitter cold temperatures that we actually felt initially this morning (when widespread below zero readings were attained) and are slated to arrive again on strong blustery winds behind an intensifying snowstorm on overnight Sunday into Monday.

    All latest meteorological guidance continues to slam the Great Lakes, Upper Midwest and Ohio Valley Into Canada with a dangerous storm center as far as snow and especially bitter cold air in it's wake. At this early juncture; I expect the storm to be one of the more memorable ones (if not most) this winter because of the combination of snow and bitter cold strong winds on the backside. Worst of the winter weather should be Sunday night into Monday. More at question now is not the bitter cold but as usual; the snow amounts. On the lower side; generally 3 - 7" is possible across all of Southeast Lower Michigan with the heavier amounts over the far southeast corner. On the higher side; generally 6 - 12" could fall (again highest Southeast corner) with a classic heavy snow track (like intimated by some of the models).

    This storm is actually the product of two systems; a low pressure system deepening as it moves from the Texas/Arkansas area - a Texas Hooker - and a Arctic blast of some of the coldest air and wind chills of several winter seasons, out over south-central Canada. The Texas Hooker is projected to track northeast through the Ohio Valley and intensify as it advances into Southern Ontario on Monday as the coldest of Arctic air surges into the system.

    If this storm continues to phase more like is projected then near blizzard or blizzard conditions are a risk on Monday over the region. If phasing develops further northeast into Ontario Canada; then the very worst of the storm will be northeast. Even if this does happen (a lower probability as of this writing Friday afternoon) dangerously bitter cold wind chills will certainly blast the region on Monday along with considerable blowing and drifting snow! Lowest wind chill values of -20 to even down to near -40 are possible behind this storm!

    Updates to follow....

    Making weather fun while we all learn,
    Bill Deedler -SEMI_WeatherHistorian

    1/2/14

    Cold Winter Unfolding Thus Far Per Outlook as Preferred December Analogue Trajectories Verify


    Analogues Point to a Cold January Likely with Coldest Air of the Season Thus Far Due Early Next Week With Some Moderation Late
     
    After the cold below normal November; December followed November's cue unfolding as expected with mainly colder than average weather and larger departures below normal. All of Southeast Lower Michigan experienced below normal temperatures on average in December. Even with over a third of the month's days /13/ having above normal temperatures; it was the below normal temperature departure days that sunk December's average temperature and subsequent departures. In the end; December averaged 2 1/2 - 4 1/2 degrees below normal across Southeast Lower Michigan with Detroit @ 26.8/-3.3; Flint @ 25.0/-2.5 and Saginaw @ 22.8/-4.5. Snowfall got off to a good start for the first real month of winter with Detroit @ 15.5"/ +5.8"; Flint @ 16.9"/+ 5.1 and Saginaw 18.9"/+ 9.9".


     


    All inclusive analogue data projected a below normal December on average along with the majority of Decembers more than a degree below average. Researching the years of below average analogue December data, the recent pattern of the autumn including local data and upper wind pattern and past November's analogue data; it was decided to go for a cold December along with a cold general winter in the Winter Outlook.

    Reviewing December's temperature data presented by this winter season's analogue's along with December's actual data outcome presented the following:

    Below normal analogue guidance for December dropped the average temperatures for December some 3 - 4 degrees below normal when using the majority (below) of three categories (above, normal, below) normal. December's predominant below normal data in the chart below shows just how close the below normal average (more than a degree and thus, considered below normal for our study - 8 /Detroit/, 7/Flint/, 5/Saginaw/) temperatures verified. All three cities came within a degree or less of the mean for below normal Decembers.  In addition; those individual analogue December's marked with an asterisk* were within a degree or less of December 2013's average. It also should be noted while Detroit came in a degree warmer than below normal analogues; those analogues years included a much less (if at all) heat island. Therefore; one could assume this past December's average temperature would fall closer to the analogue projected 25.8 temperature if the heat island affect was subtracted or diminished.




    In January's analogue guidance; below normal temperature guidance continued to rule but like last month, with some notable moderation breaks. In fact; the pattern this season does suggest the likelihood of a classic January thaw as progressive Pacific upper air jet streams also push inland and transverse the country. Meanwhile; the Polar and Arctic air over Canada will periodically get recharged during the depths of this winter.

    Frigid Blast

    The coldest air of the season thus far is slated to dive across the country later this weekend behind another storm system projected to develop ahead of the Arctic plunge. This storm is expected to move from the Arkansas region northeast into Ohio on it's way to New York state Sunday into Monday. More significant snow is likely to the north of this storm late in the weekend as bitter cold air follows in its wake at the opening of the first full week of January. Below zero temperature lows are expected to be widespread early next week; bringing the coldest air of the season and since January 2009. One might remember during that mid-month January period; Detroit's Flint's and Saginaw's temperatures fell below zero four or five days (depending on location) in a row from the 13th through the 17th. Detroit's coldest temperature cratered to -15 on the 16th and not to be out-done, Flint's fell to -19 on the 14th while Saginaw bottomed at -10. Expect some moderation in temperatures mid to late week.

    An update on the projected storm and frigid air to follow will be sent this weekend then up next; looking at the best performing analogues thus far and January's projections. 


    Making weather fun while we all learn,
    Bill Deedler -SEMI_WeatherHistorian