A warm and humid airmass is continuing to shift across the region, along with chances for showers and thunderstorms. Some storms may be strong to severe and may produce gusty winds, heavy downpours of rain, large hail, frequent lightning, and isolated tornadoes. This system will move very slowly through the Midwest, bringing severe weather chances to the area on Monday and Tuesday as well. Temperatures overnight will fall into the middle and upper 60s. Highs will reach the lower 80s on Monday and the upper 70s on Tuesday. Wet weather will stick around Wednesday, but it will be cooler with highs near 70.
Showers will finally come to an end on Thursday, but it will be cooler with highs in the lower to middle 60s. We'll see plenty of sunshine on Friday, but continued cool temperatures in the upper 60s. Memorial Day weekend will start out quiet with some sunshine Saturday and highs around 70. Shower and thunderstorm chances will be with us from Saturday night through Memorial Day.
***Tornado Watch for southern Wisconsin until 3 AM Monday.***
OVERNIGHT: Mostly cloudy and muggy with scattered showers and thunderstorms Low: 68 Wind: SE 8-15 MPH
MONDAY: Mostly cloudy, breezy, warm, and humid with scattered showers and thunderstorms High: 82 Wind: S 10-20 MPH
MONDAY NIGHT: Mostly cloudy and muggy with scattered showers and thunderstorms Low: 62 Wind: SSW 8-15 MPH
TUESDAY: Mostly cloudy, breezy, very mild, and humid with scattered showers and thunderstorms High: 78 Wind: SSW 10-20 MPH
WEDNESDAY: Mostly cloudy and a little cooler with scattered showers and isolated thunderstorms Low: 56 High: 70
THURSDAY: Variable cloudiness and cool with scattered showers, mainly in the morning Low: 53 High: 63
FRIDAY: Mostly sunny and cool Low: 43 High: 67
SATURDAY: Partly sunny and milder; becoming mostly cloudy at night with a chance for showers and thunderstorms Low: 45 High: 70
SUNDAY: Variable cloudiness with a chance for showers and thunderstorms Low: 50 High: 68
MONDAY (MEMORIAL DAY): Partly sunny, breezy, and milder with scattered showers and thunderstorms developing, mainly late in the day or at night Low: 56 High: 74
NOTES: The Storm Prediction Center says that there is a SLIGHT RISK for severe thunderstorms Sunday night for the southern two-thirds of Minnesota, all of Iowa, the western half of Illinois, and western and southern Wisconsin. A warm and humid air mass will continue to shift into the region. A developing storm system in the Plains and an approaching cold front will cause thunderstorms to develop in Iowa and Illinois before moving into Wisconsin. Severe thunderstorms are possible with hail, high winds, heavy rainfall, and isolated tornadoes possible. The severe weather threat could linger through much of Sunday night.
Because of the slow movement of the system, additional severe thunderstorms may be possible Monday and Tuesday. Hail, high winds, heavy rain, and isolated tornadoes are possible with the severe thunderstorms. Stay tuned to the forecast for severe weather updates.