MADISON, Wis. - A strong storm system is bringing the treat of severe weather to the Midwest, including Wisconsin.
A surge of mild and humid air ahead of a cold front surging through Minnesota and Iowa is fueling a strong squall line of thunderstorms.
The National Weather Service issued a severe thunderstorm watch for Adams, Columbia, Crawford, Dane, Grant, Green, Iowa, Jackson, Juneau, Lafayette, La Crosse, Marquette, Monroe, Richland, Sauk, Trempealeau and Vernon counties until 2 a.m. Tuesday.
Tornado watches are in effect for Monday evening for much of Minnesota and Iowa, and well as west-central Wisconsin. As the squall line moves into Wisconsin later this evening, the tornado threat should lessen somewhat, although the threat for damaging straight-line winds might increase a little more, at least through the evening hours. Hail is also possible with the strongest thunderstorms.
The threat for thunderstorms and severe weather should end with passage of the cold front after midnight. Skies will become partly cloudy, and winds will remain brisk.
On Tuesday, wind speeds are expected to increase after sunrise, with sustained winds of 20 to 35 mph and gusts as high as 45 mph at times. In response, the National Weather Service has issued wind advisories for all of southern Wisconsin from early morning through 6 p.m.
A weak weather disturbance will bring a chance of a shower or thunderstorm on Tuesday evening. It is possible winds could again increase in speed later Tuesday night into Wednesday, and wind advisories may be needed again.
After a quiet day on Thursday, colder weather will arrive from the end of this week into early next week. There are chances for light snow from Friday night into Saturday, and again from late Sunday into Monday of next week. Temperatures will stay below normal from the end of this week into the first part of next week.
Stay tuned to WISC-TV3, Channel3000.com and the WISC Weather app for the latest on our changing weather.
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