If this system comes down as intense as I feel it could be, with some models intimating a weak low pressure over the Eastern Lakes, there may even be some scattered areas of light accumulations of snow on grassy surfaces in the coldest locations. In any event, the weather will be more appropriate for Christmas than Halloween. Well, I guess if the stores can mix up the seasons with merchandise - why not mom nature? :-) Winter-like gear will be appropriate this Halloween.
Halloween Time Records
Looking at records at Detroit for Halloween shows the record low MAXIMUM is a cold 34 degrees/1917/ for the 31st; while the record low is a very cold 21 back in 1988. At this time, I feel neither will be realized at Detroit on the 31st since the timing of the cold air will allow a midnight /30th/ or early morning high. Later, the low before midnight on the 31st, Halloween night should hold above 21 degrees. At Flint, the record low maximum on Halloween is 37 /1993/ and the record low is 20 degrees in 1925; while Saginaw's record low maximum is 32 /1917/ and record low for Halloween is 19 /1925/.
The records for November 1st at Detroit show a record low maximum of 30 way back in 1879 - along with a record low that year of 21 degrees. Flint on the 1st, has a record low maximum of 36 /1966/ with the record low occurring not long ago, 2010. Saginaw record low max for November 1st is 38 degrees in 2002, while the record low in 21/1949.
The biggest question on this Polar plunge is where exactly, the coldest of the air will settle over - here in Southeast Lower Michigan and the Northeast, or mainly the Northeast. Just keep the winter garb handy for the chillins (and yourself) because Mom Nature will be chillin!
Next up in early November; Winter Outlook 2014-15 for Southeast Lower Michigan - The Devil is in the Details
Making weather fun while we all learn,
Bill Deedler -SEMI_WeatherHistorian