Wisconsin Weather

UPDATE - Wednesday Storm to Bring Several Inches of Snow

By Justin Poublon
11 hrs ago | 1,016   0

A winter storm will bring widespread accumulating snow to Wisconsin On Wednesday. The snow will begin around 3AM Wednesday morning in the southwest and overspread Wisconsin during the morning hours. The peak time for accumulation will be during the day Wednesday. See below for details...

Winter storm to bring snow throughout the day on Wednesday. Several inches of accumulation expected.
Winter storm to bring snow throughout the day on Wednesday. Several inches of accumulation expected.

START TIME

Snow will begin around 3am Wednesday morning in southwest Wisconsin. Dry air will need to be overcome first, then snow can begin accumulating. Sometimes this causes a bit of delay at onset which I've attempted to account for in this start time forecast. By noon it should be snowing in most places. The snow ends by 9pm Wednesday night.

Start times for the Wednesday, Feb 20 2019 winter storm.
Start times for the Wednesday, Feb 20 2019 winter storm.

SNOWFALL FORECAST

Storm total snow accumulations of 4-7" are expected northern Wisconsin. Locally higher amounts possible from Minneapolis to Duluth along the Mississippi River. 2-4" in southern and eastern Wisconsin. 1-2" inches south of I-43 in southeast Wisconsin. Snow will be heavy/wet in southeast Wisconsin. It's a complicated forecast due to timing of the snow during the middle of the day. Please see our technical discussion for a better explanation. The heaviest snow amounts between 7 & 12 inches will fall in portions of Minnesota and western Iowa.

Snowfall prediction for Wednesday. There is a lot of magenta on this map. Still trying to find the right color scheme balance!
Snowfall prediction for Wednesday. There is a lot of magenta on this map. Still trying to find the right color scheme balance!

NEXT UPDATE - This is the final forecast for this storm. Please visit our facebook page for the latest information!

CURRENT WARNINGS, WATCHES, & ADVISORIES

The warning situation is interesting. The regional view makes it looks like the storm is taking a 90 degree turn (it is not lol). Usually we see a continuation of the main snow band but not so much this time given some of the forecast challenges.

Warnings and advisories as of 4PM Tuesday.
Warnings and advisories as of 4PM Tuesday.

Short range models suggest the best potential for 6"+ will be over northwest Wisconsin in the warning area. Across the advisory area that potential is less. Still several inches of accumulation. Northern WI is on the edge with the 4-7" forecast.

Perhaps the NWS changes things overnight. Things could still change as a bit of model disagreement continues. If you can get past the aesthetics, I feel the advisory is a great fit.

ABOUT OUR MAPS

We operate independently. Unless otherwise stated; our snow maps are created by hand daily by our team. These predictions are based 100% on our personal interpretation of hundreds of model forecast simulations and gut feeling. We use snowfall ranges because snowfall amounts will always vary from one city to the next beyond our ability to forecast this far out. I attempt to smooth out the changes and variability to give you the cleanest and most accurate prediction for the Wisconsin and surround areas.

IMPORTANT LINKS

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