Two low pressure systems will affect Southeast Lower Michigan around Christmas. The first; the weaker of the two, will bring the likelihood of light snow across the southern tier of Southeast Lower Michigan on Christmas Eve. An inch or two of snow is possible over portions of the region to constitute as a white Christmas. At this time; the best chances for snow will be below I-69; or from Lansing to Flint to Port Huron and areas south including Metro Detroit and Ann Arbor to the Ohio border.
Next system on the agenda could be our first decent snowstorm of the season...and it's been a long time comin'! Latest indications are the storm will take shape over the eastern Texas; scoop up Gulf moisture and head northeast into the Ohio Valley. How close she comes to Southeast Lower Michigan will dictate the snowfall over the region. The last couple of runs of the various models have backed her a bit northwest toward the Lower Lakes but that's not written in stone, yet. As with any storm; the better sampling of the atmosphere will help dictate the true path of the storm. The energy for the storm is yet to be better sampled over the West Coast and that won't happen until late Sunday into Monday morning.
However; if things continue to develop as models are indicating; snow will likely move into Southeast Lower Michigan during the first half of Wednesday, the 26th. Stay tuned for updates on this developing winter storm potential and any changes for the snow on Christmas Eve.