Snow and Wintry Mix Ending Tonight

April Winter Storm Will Move Out Of Wisconsin Tonight

 Thunderstorms, heavy snow and rain, sleet, hail, and strong winds...that's April in one day - in Wisconsin.  A strong low pressure system will track from southern Illinois to central Indiana tonight.  For the remainder of the evening, look for snow and a few thunderstorms north of a line from Sheboygan to Cross Plains to Dodgeville.  To the south of this line, a mixture of snow, sleet and a few thunderstorms can be expected, becoming all rain toward the Wisconsin/Illinois border. This mixture will transition over to all snow and sleet this evening before diminishing or ending shortly after midnight. Total snow accumulations in the snow area mentioned above could reach 6 to 8 inches. 

For this evening...watch out for hazardous travel conditions due to falling temperatures and the accumulation of sleet and hail on area roadways.  Roads and sidewalks are becoming slippery.  A winter storm warning remains in effect for Marquette, Green Lake and Fond du Lac counties.  A winter weather advisory is in effect for Sauk, Columbia, Dodge and Sheboygan counties.  These are in effect until 7 am Wednesday morning, but there is a good chance they will be canceled early. 

The images below show the additional accumulations expected overnight for southern Wisconsin and the entire state.


     

 Here are some interesting snowfall facts for the Milwaukee and Madison area for April 19th and 20th:

 Milwaukee

The record snowfall for Milwaukee on April 19th is a Trace that fell in 1990. The record on April 20th is 3.5 inches, which fell in 1884. Milwaukee has never observed measurable snow (>0.1 inches) on April 19th and only once on the 20th. However, for the entire month of April, there are only two days that have never measured more than a trace, April 19th and April 26th.

April averages 1.7 days with at least 0.1 inches of snow and 0.6 days with at least one inch of snow. In total, Milwaukee has observed 206 days with at least 0.1 inches of snow since measurements began in 1877.

The average last day for trace snowfall is April 25th. The average last day for at least 0.1 inches of snow is April 7th and the average last day for at least an inch is March 26th.

The latest trace amount of snow has been noted was May 31, 1889. The latest 0.1 inch snow was measured was May 11, 1966. The latest 1.0 inch or more was May 10, 1990, which reported 3.2 inches.

 Madison

 The record snowfall for Madison on April 19th was 0.3 inches in 1953. The record for April 20th is 2.7 inches from 1993. These are the only measurable snowfall amounts for these days dating back to 1884. April 25th, 26th and 28th are the only three days in April that have never measured anything more than a trace.

Madison averages 1.6 days in April with at least 0.1 inches of snow. The area also only average 0.6 days with at least 1.0 inches. In total, Madison has reported 201 days, dating back to 1884, that have measured at least 0.1 inch of snowfall.

The average last day for a trace amount of snow is April 27th. The average last day for at least 0.1 inches is April 14th, while the average latest 1.0 inch day is April 7th.

The latest a trace amount of snow has been reported was May 31, 1889. The latest 0.1 inch was noted on May 11, 1966 which measured 0.7 inches. The latest one inch day was May 5, 1990, which measured 3.0 inches.

Resources:

Winter Storm Warning

Forecast Discussion

Hazardous Weather Outlook

Winter Briefing Page

Winter Weather Page




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