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Weekly Forecast

A cold front will slide through Wisconsin today and tonight. Skies will be variably cloudy, and it will be very warm and humid with scattered showers and thunderstorms, mainly in the afternoon and evening, though some storms may occur this morning in the north. High temperatures will reach the middle to upper 80s. Heat index values will make it feel like the lower 90s at times. Some of the afternoon and evening thunderstorms may produce heavy downpours of rain. An isolated thunderstorm may also become severe with hail and high winds. Temperatures will fall to the middle 60s by early Tuesday morning.

The cold front will continue to move to the south on Tuesday keeping skies mostly cloudy with scattered showers and isolated thunderstorms. Cooler air will move into southern Wisconsin with high temperatures returning to the 70s.

High pressure will move across the Midwest on Wednesday and Thursday with partly sunny skies and lower humidity levels. High temperatures will be approaching 80 degrees.

As warm and humid air begins to head back to Wisconsin for the end of next week, shower and thunderstorm chances will return.

Warm and more humid weather will return to Wisconsin from Friday through the weekend. Skies will be mostly cloudy on Friday with scattered showers and thunderstorms and highs in the middle 70s. Saturday will be partly sunny with just a chance of showers and thunderstorms and highs near 80 degrees. Sunday will be variably cloudy with scattered showers and thunderstorms, and highs in the lower 80s.

The heat and humidity will continue to build into early next week. Next Monday will be partly sunny and humid with a slight chance of a shower or a thunderstorm. Highs will reach the middle 80s. Next Tuesday will be partly sunny with a chance of showers and thunderstorms and highs in the middle 80s. Showers and thunderstorms will be scattered next Wednesday with highs in the middle 80s.

TODAY:

Variable cloudiness, very warm and humid with scattered showers and thunderstorms, mainly in the afternoon and evening; some storms could produce heavy downpours of rain

High: 86; Heat Index: 88 to 93

Wind: SW 8-15 MPH to N late in the day

TONIGHT:

Mostly cloudy and humid with scattered showers and thunderstorms; some storms could produce heavy downpours of rain

Low: 64

Wind: NE 6-12 MPH

TUESDAY:

Mostly cloudy and cooler with scattered showers and isolated thunderstorms

High: 75

Wind: E 8-15 MPH

WEDNESDAY:

Partly sunny and very mild

Low: 60

High: 76

THURSDAY:

Partly sunny and warm (mostly cloudy with a chance of showers and thunderstorms at night)

Low: 59

High: 76

FRIDAY:

Mostly cloudy, mild and a little more humid with scattered showers and thunderstorms

Low: 62

High: 76

SATURDAY:

Partly sunny, warm and humid with a chance of showers and thunderstorms

Low: 62

High: 78

SUNDAY:

Variable cloudiness, warm and humid with a chance of showers and thunderstorms

Low: 63

High: 80

MONDAY:

Partly sunny, warm and humid with a slight chance of a shower or a thunderstorm

Low: 64

High: 84

TUESDAY:

Partly sunny, warm and humid with a chance of showers and thunderstorms

Low: 64

High: 84

WEDNESDAY:

Variable cloudiness, very warm and humid with scattered showers and thunderstorms

Low: 65

High: 85

NOTES:

A HEAT ADVISORY is in effect until 7 PM Monday for north-central and northwestern Illinois, including the counties of JO DAVIESS, STEPHENSON, WINNEBAGO, BOONE and McHENRY (this includes the Rockford metropolitan area). In Iowa, this includes the counties of DELAWARE and DUBUQUE.

Severe weather outlook for today: MARGINAL RISK for nearly all of Iowa, the northern third of Illinois, and the southern third of Wisconsin (south of a La Crosse to Stevens Point to Sheboygan line). Threats: high winds, hail, heavy rainfall. Timing: Monday afternoon/Monday night. Coverage: isolated to a few severe thunderstorms are possible.

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