Skies will become increasingly cloudy tonight. There is a chance for a shower or thunderstorm toward morning, mainly well west of Madison. Temperatures will fall to the middle 60s by late evening; overnight low temperatures will fall to the upper 50s by morning.
Thursday will be mostly cloudy, and it will become breezy with scattered showers and thunderstorms. High temperatures will be in the upper 70s to around 80 degrees.
As a warm front moves northward from Thursday night into early Friday morning, rain chances will go down, and temperatures and humidity will go up. Friday will be partly sunny, hot, and humid with just a slight chance for showers and thunderstorms. High temperatures will be near 90 degrees, with heat index readings in the lower to middle 90s. Saturday will also be partly sunny, hot, and humid with a chance for showers and thunderstorms; high temperatures will be in the lower 90s, with heat index values in the upper 90s to lower 100s. On Sunday, a low pressure system and weak cold front will move into Wisconsin. Skies will be variably cloudy, and it will be very warm, and humid with scattered showers and thunderstorms likely. High temperatures will be in the mid to upper 80s, with heat indices in the lower to middle 90s.
The weak cold front will then sink to the south for Monday, which will bring an end to any showers and thunderstorms early in the day. It will then become very warm and a bit less humid with high temperatures in the middle 80s and heat indices in the upper 80s. Tuesday will be partly sunny and very warm with high temperatures in the middle 80s and heat index values near 90 degrees.
Wednesday will be partly sunny, breezy, hot and more humid with high temperatures near 90 degrees and heat indices in the middle 90s.
TONIGHT:
Increasing cloudiness with a chance for showers and thunderstorms west of Madison toward morning.
Low: 58
Wind: SE 5-10 MPH
THURSDAY:
Mostly cloudy and becoming breezy with scattered showers and thunderstorms.
High: 78
Wind: S/SE increasing to 10-20 MPH
THURSDAY NIGHT:
Mostly cloudy, breezy, milder, and more humid with scattered showers and thunderstorms, mainly in the evening.
Low: 68
Wind: S/SW 10-20 MPH
FRIDAY:
Partly sunny, hot, and humid with a slight chance for showers and thunderstorms.
High: 90; Heat Index: 92 to 97
Wind: SW 8-15 MPH
SATURDAY:
Partly sunny, hot, and humid with a slight chance for showers and thunderstorms.
Low: 71
High: 92; Heat Index: 96 to 101
SUNDAY:
Variable cloudiness, very warm, and humid with scattered showers and thunderstorms.
Low: 74
High: 86; Heat Index: 91 to 96
MONDAY:
Mostly cloudy with any showers and thunderstorms ending early, then becoming partly sunny and very warm, but turning less humid.
Low: 68
High: 85; Heat Index: 85 to 90
TUESDAY:
Partly sunny, and continued very warm.
Low: 64
High: 86; Heat Index: 86 to 91
WEDNESDAY:
Partly sunny, breezy, hot, and more humid.
Low: 65
High: 90; Heat Index: 93 to 98
NOTES:
The Storm Prediction Center says that there is MARGINAL RISK for severe thunderstorms on Thursday and Thursday night for southeastern Minnesota, much of Iowa, the northern half of Illinois, and the southwestern third of Wisconsin (south and west of an Eau Claire to Stevens Point to Sheboygan line). A warm front will be lifting northeastward from Iowa and Missouri on Thursday morning into southern Wisconsin on Thursday night. Showers and thunderstorms are likely along and ahead of the front. Drier air across Wisconsin and cool temperatures because of widespread cloud cover north of the front will limit atmospheric instability. Isolated severe thunderstorms may be possible, with hail and high winds the main threats. An isolated tornado may be possible in a storm near the warm front in the late afternoon or evening. The severe weather threat will end as the warm front lifts into Michigan later Thursday night.
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