The last unseasonably warm day before temps fall through the floor

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The 4th, and what seems to be the final, day of unseasonably warm and lovely fall weather is scheduled for Wednesday. You’ll want to get all your outdoor chores done before the fast change in seasons starts Thursday.

Wednesday will seemingly be a repeat of Tuesday with winds out of the south at 10 to 20 mph and gusting up to 30, and temperatures climbing into the low 70’s.

High pressure will again moderate our weather until overnight Wednesday into Thursday when cloud cover will increase ahead of scattered rain chances Thursday afternoon. This will be the start of the impacts we’ll see of the large, strong October storm.

An upper level low will continue to progress across the Dakota’s Wednesday and Thursday and drop snow there, while a surface low will draw warmth and moisture from the southern states out ahead of it. This process will bring us rain and thunderstorm chances Thursday, Thursday night, and most of Friday.

Sometime during the day Friday these two systems will morph together and a very strong cold front will dive into the central U.S. This will cause colder temperatures to wrap around the center of the low and very strong wind gusts will be likely into the weekend with some gusts reaching the 40 to 45 mph range Saturday.

Because the upper level pressure center is forecast to combine , or “stack” with surface low pressure, cold dry air will likely wrap around the center of the system. This could cut off the moisture supply from the cooler temperatures and thus, make it difficult for the system to produce snow around the Chippewa Valley Friday.

We still could see our first flurries and even some minor accumulations in some northern counties in Wisconsin Friday night, but most of the heavy snow will stay in the Dakota’s and far northwestern Minnesota.

Saturday evening into Sunday morning, as the center of the low makes it’s way towards the Great Lakes, we could see minor accumulations. Should wrapping cold air pick up enough moisture as the west edge of the low passes over us we could see measurable snow (measurable is considered a tenth of an inch). As of now, snow totals are unclear so check back for more tomorrow.

Overall, there will continue to be very winter like temperatures in the 30’s Saturday and Sunday with those same ‘wrap around’ chances for light drizzle, a wintry mix, and flurries.

 

 

Justin Esterly

Justin Esterly

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