* Winter Storm Watch in effect Thursday evening-Friday for Mason, Lake, Osceola, Clare, Isabella, Gratiot, Mecosta, Montcalm, Oceana, and Newaygo Counties (and counties south into SW Lower Michigan) due to the approaching winter storm. Additional Watches, Warnings and/or Advisories possible.*
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Currently, a storm system is getting its act together in Texas as it will continue to intensify as it heads N/NE over the next few days. Several states have Winter Storm Warnings already in effect due to this storm.
Winter Storm Watches also are in effect for other states. Blizzard conditions should develop in the Plains to Minnesota/Iowa/Western Wisconsin through at least Saturday.
There are several factors with this storm that will determine what falls where and at what time. It is a very complex situation, for sure.
The factors are:
Winds. The winds will increase Thursday evening out of the east. Wind speeds Thursday afternoon will be 10-18mph. Through the evening and overnight hours, wind speeds will be 15-30mph and gusty. Even through all of Friday, the winds will be easterly (maybe southeasterly in our central counties) 15-30mph and gusty. These east winds at the surface will be very dry coming in from Ontario. The winds will eat away at the initial surge of moisture/precipitation Thursday evening and night. But eventually, the moisture will win out and the icy mix will develop from south to north across the region.
Temperatures. The temperatures at the surface and about 5,000 feet up will be very critical also to what we will see. At a mile up, temperatures will be around 40 degrees which supports rain. But at the 6 foot level, temperatures will be in the lower to middle 30′s which supports that icy mix. However, at ground level where the surface is below freezing (i.e. the snow pack), it supports freezing rain. So, even a degree or two change…higher or lower…aloft and at the surface will change the precipitation accordingly. The computer models this afternoon are not in general agreement with the temperatures at 5k feet up, so yes, we have some huge questions still about precipitation type for Thursday night and Friday.
Marine influences. We cloud see more of a liquid event (rain) for areas near Lake Huron with water temperatures a bit warmer.
Elevation. With the different elevation in the state, that will create issues as well.
So, as you can tell, this is no clear-cut, easy forecast for precipitation type!
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The storm will start to affect the state Thursday mid to late afternoon with SW Lower Michigan (south of I-96 and west of US-131) with sleet, freezing rain, rain mix potential. This strong surge of mixed/icy precipitation should expand N/NE Thursday evening and night…up to about M-68/M-32 by Friday a.m. The E.U.P. and the Tip of the Mitt should miss out on the icy mix through Friday early a.m. We should see a chance for snow, however late Thursday night and Friday early a.m.
By Friday Noon, we should see a snow/mix across the U.P. (maybe some rain/mix near Lake Huron), with the icy mix still looking likely for areas south of the Straits to about M-55 with more of a rain/mix closer near Lake Huron. Farther south of M-55, we could actually see more of a drizzle/icy mix as the bulk of the moisture heads north.
By Friday 5p.m., the temperatures aloft and at the surface should cool enough to change everything over to pockets of snow and this should continue into Friday night and the weekend with some accumulation expected with the colder air moving in.
Tonight and Thursday will be relatively quiet with partly cloudy skies expected through Thursday a.m. then the clouds increase in advance of the storm.
Also keep in mind that with the strong winds, any ice accumulations on power lines and tree limbs could contribute to them cracking and falling.
Over the next few days, please feel free to add conditions in your area (precipitation type, road conditions, etc) in the comment section below so others can utilize that information.
Keep it tuned right here for the latest updates!!
-Meteorologist Jim Lehocky