As a powerful early season storm moves through the area today, showers and thunderstorms will be crossing the area this afternoon. The first round will not be severe in nature, but later this afternoon and evening, a cold front will come through that will bring more showers and stronger thunderstorms, some of which could be severe with large hail and strong winds being the main threat. It will be windy and mild with highs reaching the upper 50s this afternoon.
Showers and thunderstorms will continue overnight, but the severe threat will end with the passage of the cold front. It will remain breezy with lows in the lower 40s.
As the storm moves away from Wisconsin on Wednesday, it will be mostly cloudy, very windy, and cooler with scattered showers. High temperatures will be around 50. Winds may gust as high as 50 MPH at times.
Cooler weather will return for the end of the work week into the weekend. Thursday will be mostly cloudy, breezy, and colder with isolated rain showers, possibly mixing with snow briefly Thursday night before ending. Highs will reach the lower to middle 40s. Friday will be variably cloudy and seasonably cool with high temperatures in the lower 40s again.
For the weekend, a weak weather system will move through the Midwest on Saturday, with variably cloudy skies and a slight chance for some drizzle or flurries. High temperatures will be near 40 degrees. Skies will gradually become partly sunny on Sunday with highs remaining near 40. Monday will be partly sunny and seasonably cool with highs in the middle 40s.
Warmer air will return next week as another strong storm system develops to our west. Tuesday will be breezy and milder with a slight chance of showers and highs near 50. Wednesday will be breezy and quite mild with showers and thunderstorms developing later in the day and highs near 60.
***High Wind Watch for southern WI from early Wednesday morning through Wednesday evening***
THIS AFTERNOON:
Mostly cloudy, windy and mild with areas of fog and scattered showers and thunderstorms, some may be severe late in the afternoon and in the evening with large hail and strong winds.
High: 58
Wind: SE 15-25 MPH
TONIGHT:
Mostly cloudy, breezy and mild with scattered showers and thunderstorms, some may be severe early.
Low: 43
Wind: SE to SW 10-20 MPH
WEDNESDAY:
Mostly cloudy, very windy and cooler with scattered showers.
High: 49
Wind: W 20-35 MPH (gusts to 50 MPH)
WEDNESDAY NIGHT:
Mostly cloudy, breezy and not as mild with scattered rain showers (possibly mixed with snow north of Madison).
Low: 36
Wind: NW 10-20 MPH
THURSDAY:
Mostly cloudy, breezy and seasonably cool with isolated rain showers (possibly mixing with snow overnight before ending).
High: 43
Wind: NW 10-20 MPH
FRIDAY:
Variably cloudy and seasonably cool.
Low: 32
High: 43
SATURDAY:
Variably cloudy and seasonably cool with a slight chance of drizzle or flurries.
Low: 30
High: 41
SUNDAY:
Becoming partly sunny and seasonably cool.
Low: 26
High: 40
MONDAY:
Partly sunny and seasonably cool.
Low: 25
High: 45
TUESDAY:
Variably cloudy, breezy and milder with a slight chance of showers.
Low: 31
High: 49
WEDNESDAY:
Variably cloudy, breezy and quite mild with showers and thunderstorms developing late in the day.
Low: 41
High: 59
NOTES:
The Storm Prediction Center says that there is a SLIGHT RISK of severe thunderstorms today and tonight for northern and central Illinois, eastern Iowa, as well as far southern Wisconsin (south of a line from Prairie du Chien to Madison to West Bend), and a MARGINAL RISK of severe thunderstorms for the eastern third of Iowa, the rest of Illinois, and the southern third of Wisconsin (south of a La Crosse to Sheboygan line). Mild and somewhat humid air will cover the central Midwest today, as a cold front sweeps eastward through Wisconsin and Illinois during the afternoon. Thunderstorms are expected along and ahead of the cold front, and there is the potential for a few severe thunderstorms to develop. Strong wind fields above the cold front and colder air aloft may result in the severe thunderstorms producing high winds and hail. Isolated tornadoes cannot be ruled out as well, but higher wind shear indicates that the tornado threat will be highest in the SLIGHT RISK area farther to the south into eastern Illinois. The severe weather threat will end with passage of the cold front tonight.
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