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Wisconsin Weather

JAN 1, 2021 | New Years Day Snow/Mix Southern Wisconsin

LAST UPDATE : DEC 30, 2020

MON 10:40PM - 00zGFS was more aggressive with FRIDAY/SAT AM system. All medium range models look very much alike now (especially w/ precip type evolution from mix to snow). Typical differences in details such as snow amts. Here is an example of what snow totals MIGHT look like FRI-SAT AM. Probably mixed with sleet initially.

00z GFS snowfall prediction for FRI JAN 1
00z GFS snowfall prediction for FRI JAN 1

MON 12/28 2:43pm - Toned down the verbiage for the FRI New Years Day system. At high level this looks like a significant weather maker for the central US heading into southern WI. GFS trended closer to the EC today increasing probability there will be snow/mix/rain Friday. Looking at measurables i.e snowfall, not real impressive. A few reasons for that; strong warm surge. Top-down cooling. Narrow zone of snow accumulation with mix or rain in far southern WI. With TUES PM system dominating the storyline will wait another day before getting into detail.

12/27/2020 - 10:27pm -18/00z GFS continues to be weaker with winter storm potential. It's own ensembles are all over the place. Not placing much confidence in it. Looking forward to the 00z EC.

12/27/2020 - 8:11am - Initially looked like this storm would stay well east. Recent models trends put Wisconsin on the receiving end yet again, some models more than others. Model consistency is poor/bad with considerable timing and track disagreement. Before I speculate on impacts I will wait for models to settle down. Stay tuned.

Forecast Maps

Snow


Ice & Sleet

Ice & Sleet
Glaze
0.1-0.2"
0.2-0.5"
0.5-1.0"
1-2"
2"+

Verification


Storm Details

Hazards
Winter Storm, Wintry Mix
Start
FRI 6:00 AM - Jan 01, 2021
End
SAT 6:00 AM - Jan 02, 2021
Confidence Level
Storm Class

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Watching FRI JAN 1 for yet another system. Medium range models now suggest this system is likely to impact WI HOWEVER consistency is very poor. Confidence is low.

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January 1, 2021

24HR Radar Loop
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Snow Accumulation 24Hr
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January 2, 2021

24HR Radar Loop
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Snow Accumulation 24Hr
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Storm Reports

SNOW (74)
SNOW
SNOW
WEST BEND, WI
5.8"
SNOW
SNOW
SLINGER, WI
5.4"
SNOW
SNOW
CEDAR GROVE, WI
5.3"
SNOW
SNOW
JACKSON, WI
5.0"
SNOW
SNOW
SAUKVILLE, WI
5.0"
SNOW
SNOW
RANDOM LAKE, WI
5.0"
SNOW
SNOW
1 S OCONOMOWOC, WI
4.8"
SNOW
SNOW
1 NNE OCONOMOWOC, WI
4.6"
SNOW
SNOW
1 WSW RACINE, WI
4.5"
SNOW
SNOW
2 NE OKAUCHEE LAKE, WI
4.5"
SNOW
SNOW
OOSTBURG, WI
4.5"
SNOW
SNOW
4 N SULLIVAN, WI
4.5"
SNOW
SNOW
BELGIUM, WI
4.5"
SNOW
SNOW
5 N LAC LA BELLE, WI
4.2"
SNOW
SNOW
1 W OCONOMOWOC, WI
4.1"
SNOW
SNOW
1 N WAUKESHA, WI
4.1"
SNOW
SNOW
1 SW LAC LA BELLE, WI
4.0"
SNOW
SNOW
1 SE JACKSON, WI
4.0"
SNOW
SNOW
1 S MILWAUKEE, WI
4.0"
SNOW
SNOW
BROOKFIELD, WI
4.0"
SNOW
SNOW
2 SSW SHEBOYGAN, WI
4.0"
SNOW
SNOW
2 WSW SLINGER, WI
4.0"
SNOW
SNOW
PALMYRA, WI
4.0"
SNOW
SNOW
IXONIA, WI
4.0"
SNOW
SNOW
WATERTOWN, WI
4.0"
SNOW
SNOW
THIENSVILLE, WI
3.9"
SNOW
SNOW
1 SE GERMANTOWN, WI
3.8"
SNOW
SNOW
1 NW KENOSHA, WI
3.5"
SNOW
SNOW
2 N OCONOMOWOC, WI
3.5"
SNOW
SNOW
CEDARBURG, WI
3.5"
SNOW
SNOW
1 NE GERMANTOWN, WI
3.4"
SNOW
SNOW
2 E BUTLER, WI
3.3"
SNOW
SNOW
4 SSE SULLIVAN, WI
3.3"
SNOW
SNOW
2 NE MENOMONEE FALLS, WI
3.2"
SNOW
SNOW
2 NW BAYSIDE, WI
3.0"
SNOW
SNOW
1 S GERMANTOWN, WI
3.0"
SNOW
SNOW
1 NNE MERTON, WI
3.0"
SNOW
SNOW
1 W BROOKFIELD, WI
3.0"
SNOW
SNOW
1 SE OCONOMOWOC, WI
3.0"
SNOW
SNOW
6 NNW ELKHORN, WI
3.0"
SNOW
SNOW
CAMBRIDGE, WI
3.0"
SNOW
SNOW
FREDONIA, WI
3.0"
SNOW
SNOW
SHEBOYGAN, WI
3.0"
SNOW
SNOW
PORT WASHINGTON, WI
3.0"
SNOW
SNOW
RICHFIELD, WI
3.0"
SNOW
SNOW
NASHOTAH, WI
3.0"
SNOW
SNOW
2 WSW RACINE, WI
2.9"
SNOW
SNOW
3 ESE PEWAUKEE, WI
2.8"
SNOW
SNOW
MILWAUKEE, WI
2.8"
SNOW
SNOW
2 NW BROOKFIELD, WI
2.8"
SNOW
SNOW
2 WSW SAINT FRANCIS, WI
2.6"
SNOW
SNOW
2 SE WAUWATOSA, WI
2.5"
SNOW
SNOW
1 W WAUKESHA, WI
2.5"
SNOW
SNOW
1 E MERTON, WI
2.5"
SNOW
SNOW
2 NW WAUKESHA, WI
2.4"
SNOW
SNOW
2 SE BIG BEND, WI
2.2"
SNOW
SNOW
1 E GERMANTOWN, WI
2.1"
SNOW
SNOW
1 E WAUWATOSA, WI
2.0"
SNOW
SNOW
1 SSW SHEBOYGAN, WI
2.0"
SNOW
SNOW
2 NNE VERONA, WI
2.0"
SNOW
SNOW
2 SSW SHOREWOOD HILLS, WI
2.0"
SNOW
SNOW
BROWN DEER, WI
2.0"
SNOW
SNOW
WAUKESHA, WI
2.0"
SNOW
SNOW
2 W MILWAUKEE, WI
1.9"
SNOW
SNOW
3 SW SHOREWOOD HILLS, WI
1.7"
SNOW
SNOW
1 NE MERTON, WI
1.7"
SNOW
SNOW
1 SSW SHOREWOOD HILLS, WI
1.5"
SNOW
SNOW
1 W JOHNSON CREEK, WI
1.5"
SNOW
SNOW
2 N VERONA, WI
1.5"
SNOW
SNOW
COTTAGE GROVE, WI
1.5"
SNOW
SNOW
BROOKLYN, WI
1.3"
SNOW
SNOW
4 ENE MAPLE BLUFF, WI
1.0"
SNOW
SNOW
DEERFIELD, WI
1.0"
SNOW
SNOW
2 NNE MAPLE BLUFF, WI
0.6"