A nearly stationary front is located just south of Wisconsin. Severe thunderstorms with high winds, hail and heavy rainfall are possible this afternoon and evening. These storms will develop to the west and then head east or southeast through southern Wisconsin. High temperatures will reach the lower to middle 80s. The threat for severe storms will come to an end later Thursday night with the passage of a cold front. Lows will stay in the upper 60s.
It will be variably cloudy, breezy, a little cooler and turning less humid on Friday. As an area of low pressure heads to the northeast, there will be a slight chance of showers and thunderstorms, mainly in areas north of Madison. High temperatures will be near 80 degrees.
Pleasant and dry weather will return for the weekend. Skies will be partly sunny for both Saturday and Sunday. High temperatures will be in the upper 70s on Saturday and in the lower to middle 80s on Sunday.
Monday will be partly sunny, very warm and humid with high temperatures in the upper 80s. Heat index values will climb back into the lower 90s. Scattered showers and thunderstorms will move in on Tuesday, but it will remain breezy, very warm and humid with highs in the upper 80s and heat index values in the 90s.
Wednesday and Thursday will also be very warm and humid with lesser chances of showers and thunderstorms. Highs will be in the mid to upper 80s, and heat index values will remain in the lower 90s. Friday will be partly sunny and warm, but less humid with highs in the lower 80s.
THIS AFTERNOON:
Variably cloudy, warm and humid with scattered showers and thunderstorms. Some thunderstorms may be severe with high winds, hail and heavy rainfall.
High: 82; Heat Index: 84 to 89
Wind: SE 8-15 MPH
TONIGHT:
Mostly cloudy with scattered showers and thunderstorms, some of which could be severe in the evening. Patchy fog is possible.
Low: 67
Wind: SE to W 6-12 MPH
FRIDAY:
Variably cloudy, breezy, a little cooler and becoming less humid with a slight chance of isolated showers and thunderstorms.
High: 80
Wind: NW 10-20 MPH
FRIDAY NIGHT:
Becoming partly cloudy and comfortable.
Low: 59
Wind: NW 6-12 MPH
SATURDAY:
Partly sunny and pleasant.
High: 79
Wind: N 6-12 MPH
SUNDAY:
Partly sunny and warm.
Low: 59
High: 82
MONDAY:
Partly sunny, breezy, very warm and more humid.
Low: 64
High: 87; Heat Index: 89 to 94
TUESDAY:
Variably cloudy, breezy, very warm and humid with scattered showers and thunderstorms.
Low: 68
High: 87; Heat Index: 89 to 94
WEDNESDAY:
Variably cloudy, breezy, very warm and humid with a chance of showers and thunderstorms.
Low: 69
High: 86; Heat Index: 88 to 93
THURSDAY:
Partly sunny, very warm and humid with a slight chance of showers and thunderstorms.
Low: 67
High: 87; Heat Index: 89 to 94
FRIDAY:
Partly sunny and warm, but less humid.
Low: 64
High: 83
NOTES:
There is a SLIGHT RISK of severe thunderstorms across the southern two-thirds of Minnesota, northeastern Iowa, northern Illinois, and the southwestern two-thirds of Wisconsin (south of a Superior to Oshkosh to Milwaukee line), and a MARGINAL RISK of severe thunderstorms for the rest of Minnesota and Wisconsin. As a storm system moves through the Midwest, it will interact with a very warm to hot and humid air mass. Cloud cover from previous thunderstorm activity may keep Minnesota and Wisconsin a little cooler than Iowa and Illinois, so thunderstorm development is most likely along the boundary near the Minnesota/Iowa border between the cloud cooled air to the north and the hot and humid air that gets sunshine to the south. These thunderstorms will move eastward into Wisconsin and Illinois on Thursday afternoon and Thursday night. High winds, hail, tornadoes, and heavy rainfall are all possible.
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