Mostly clear skies this evening will become mostly cloudy overnight. There will be a chance of showers and thunderstorms late tonight. Temperatures will only drop to around 70 degrees by late evening; overnight low temperatures will fall to the lower 60s by morning.
The overall weather pattern will become more active for the rest of the week, leading to daily chances for rain, although most days will also have plenty of rain-free hours as well. Tuesday will be variably cloudy, and it will be warm and more humid with scattered showers and thunderstorms, mainly in the afternoon. High temperatures will be in the lower 80s. Tuesday night will be variably cloudy and humid with a chance of showers and thunderstorms in the evening, followed by areas of fog developing overnight. Temperatures will fall to near 60 degrees by early Wednesday morning.
On Wednesday, a weak cold front will move into central Wisconsin, before returning northward as a warm front on Thursday. It will be mostly cloudy, very mild and humid with scattered showers and thunderstorms. High temperatures will reach the upper 70s. On Thursday, skies will be variably cloudy and it will remain warm and humid with just a chance of showers and thunderstorms. High temperatures will be in the lower 80s.
As we head toward the Memorial Day weekend, a storm system will pass to the west of Wisconsin on Friday and Saturday. Friday will be mostly cloudy, breezy, warm and humid with scattered showers and thunderstorms. High temperatures will reach the lower 80s. Saturday will be mostly cloudy, breezy, warm and humid with scattered showers and thunderstorms. High temperatures will be in the lower 80s. Sunday will be variably cloudy and it will be warm and humid with a chance of showers and thunderstorms. High temperatures will reach the lower 80s.
An area of high pressure will develop to the north of Wisconsin on Memorial Day. Skies will be partly sunny, and it will be warm and humid with just a slight chance of showers and thunderstorms. High temperatures will be in the lower 80s.
TONIGHT:
Mostly clear this evening, then becoming mostly cloudy and very mild with a chance of showers and thunderstorms late.
Low: 61
Wind: S 8-15 MPH
TUESDAY:
Variable cloudiness, warm, and more humid with scattered showers and thunderstorms, mainly in the afternoon.
High: 81
Wind: S/SW 8-15 MPH
TUESDAY NIGHT:
Variable cloudiness and very mild with scattered showers and thunderstorms, mainly in the evening; areas of fog forming overnight.
Low: 60
Wind: Light SE
WEDNESDAY:
Mostly cloudy, very mild, and humid with scattered showers and thunderstorms.
High: 77
Wind: S/SE 8-15 MPH
THURSDAY:
Variable cloudiness, warmer, and humid with a chance of showers and thunderstorms.
Low: 62
High: 83
FRIDAY:
Mostly cloudy, breezy, warm, and humid with scattered showers and thunderstorms.
Low: 63
High: 82
SATURDAY:
Mostly cloudy, breezy, warm, and humid with scattered showers and thunderstorms.
Low: 64
High: 82
SUNDAY:
Variable cloudiness, warm, and humid with a chance of showers and thunderstorms.
Low: 60
High: 81
MEMORIAL DAY (MONDAY):
Partly sunny, warm, and humid with a slight chance of showers and thunderstorms.
Low: 59
High: 82
NOTES:
The Storm Prediction Center says that there is a SLIGHT RISK of severe thunderstorms for Tuesday and Tuesday night across southwestern Iowa, and a MARGINAL RISK of severe thunderstorms for the southern half of Minnesota, the rest of Iowa, all but far eastern Illinois, and all but far northern Wisconsin (south of a Hayward to Marinette, MI line). A warm and increasingly humid air mass will cover much of the Midwest beginning on Tuesday and lasting through Memorial Day. A weakening line of thunderstorms from Monday night moving through Wisconsin on Tuesday afternoon may develop a little more, with an isolated strong to severe thunderstorms possible; hail and high winds would be the main threats. The severe weather threat should lessen as the thunderstorms weaken and move eastward on Tuesday evening.
There is a SLIGHT RISK of severe thunderstorms for Wednesday and Wednesday night for the southern half of Iowa, and the southern two-thirds of Illinois, and a MARGINAL RISK of severe thunderstorms for most of Minnesota (except for the far northeast), the rest of Iowa, the rest of Illinois, and the southwestern two-thirds of Wisconsin (south of a Superior to Rice Lake to Manitowoc line). Very mild to warm and humid air will continue across the Midwest on Wednesday. A storm system developing in Kansas will move to northwestern Minnesota by Wednesday night. Thunderstorms from Tuesday night in the Plains may continue into the central Midwest on Wednesday. Isolated severe thunderstorms are possible from Minnesota through much of Wisconsin into northern Illinois, with hail and high winds being the main threats. Little more widespread severe thunderstorm activity is expected into southern Iowa and central and southern Illinois, where warmer temperatures should lead to more instability, and where there may be the threat for a few tornadoes.
It is possible there will be a daily threat for at least isolated severe thunderstorms into the weekend. The actual threat may be refined more when it becomes apparent where the best chance of thunderstorms development will be on a given day.
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