Wisconsin Weather

JAN 11, 2018 | Winter Storm Northwest Wisconsin

Event Type
Impact
3 - Moderate
Date
Tue Jan 9 - Fri Jan 12, 2018

Event Summary

Low pressure system produced rain and snow across Wisconsin. 2-6" of snow was deposited onto northwest Wisconsin by the latest storm. 9.3" of heavy snow fell in Gile with help from lake Enhancement. Lesser amounts in central and northeast regions. The freezing rain impact yesterday was very localized. Combo of warm ground temperatures and quick moving front turned out to be unfavorable for ice accumulation. Rapidly falling temperatures left us with icy spots this morning. 

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Last Update: January 9 2018

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Here we go, Wisconsin. We are entering a stormy and unsettled pattern. Tendency towards upper level troughiness will return to western north america to the first time this winter. 
40F difference in high temps from northwest to southeast Wisconsin tomorrow. Everyone cools off with the cold front passage. 
24HR temp change shows location of cold front across western Wisconsin. Feels great in Oshkosh this morning. 
Heavy snow is developing across northwest Wisconsin. Looks like 2-6" of additional snow accumulation, lesser amounts in the northeast. To the south, light freezing rain was reported in northeast Iowa earlier. This precipitation is moving into southern Wisconsin now. Up to 0.10" of ice accumulation is possible this afternoon. And for the icing on the cake, a 50F temperature swing from northwest to southeast Wisconsin! Flash freeze seems likely. Precipitation will end tonight.
SNOW DEPOSITS - 2-6" of snow was deposited onto northwest Wisconsin by the latest storm. 9.3" of heavy snow fell in Gile with help from lake Enhancement. Lesser amounts in central and northeast regions. The freezing rain impact yesterday was very localized. Combo of warm ground temperatures and quick moving front turned out to be unfavorable for ice accumulation. Rapidly falling temperatures left us with icy spots today.
Looking at historical data for Oshkosh. We are at 4.1" snow accum. This is the lowest since the 2014-15 winter which is only a few years back. 2012 had 0.9" through Jan 10. So lack of snow is not uncommon at KOSH. What is uncommon is the combination of below avg temp and below avg snow. On average more cold = more snow. There is one year with this relationship that had same level of snow accum (<=5"). 1925 was much warmer in the second half of winter, precip at average, snow below avg. We don't know much else about 1925. This demonstrates that it is rare to be this cold and not have the snow to go with it. It translates into a boring, cold start to winter but I would be surprised in this trend continued into the second half of the 2017-18 winter. 
60 DAY PRECIPITATION TREND - Snowfall has not been distributed equally across Wisconsin during the first half of winter. This liquid precipitation (including snow melted to water) departure from average map shows northern Wisconsin has come through near average. They are doing alright. Lake effect has helped in upper Michigan. Meanwhile folks in the south are facing a 2.0" deficit. It has been colder than average, which should mean more snow/less precip. The storm track has been out of the northwest bringing dry Canadian clipper systems, efficient but narrow snows. What exposed southern WI/northern IL this winter is the lack of a big storm (snow or rain). We'll see if we can change this trend in the months ahead.