Clouds will increase tonight as showers and thunderstorms move into the area from the northwest. It will be warm and humid with lows near 70. These storms have the potential to be severe as they move through, with high winds being the main threat.
Showers and thunderstorms will end early on Monday, but will then redevelop in the afternoon or evening. The early showers and thunderstorms will be weakening in the morning, but the ones that develop in the afternoon will once again have the potential to be severe. Skies will be variably cloudy, and it will remain very warm and humid with high temperatures reaching the upper 80s to near 90 and heat index values into the mid 90s. On Tuesday, a weak cold front will move through Wisconsin. Expect variably cloudy skies, warm and humid conditions, and a slight chance of isolated showers and thunderstorms again. High temperatures will be in the middle 80s and heat index values in the upper 80s to lower 90s.
Wednesday will be partly sunny, warm, and humid with high temperatures in the middle 80s. On Thursday, another low pressure system will develop to our west leading to variably cloudy skies and another chance of showers and thunderstorms late in the day. High temperatures will remain in the middle 80s. Friday will be partly sunny, hot and humid with another slight chance of isolated showers and thunderstorms. High temperatures will be near 90, with heat index readings in the mid 90s.
Hot and humid weather will continue into next weekend. Saturday will be partly sunny, hot, and humid with a slight chance of isolated showers and thunderstorms; high temperatures will be in the lower 90s; heat index values will be in the upper 90s to 100. A cold front will move through Wisconsin on Saturday night into Sunday. Skies on Sunday will be mostly cloudy, and it will be warm and humid with scattered showers and thunderstorms, mainly early; high temperatures will be in the middle 80s.
THIS EVENING:
Variably cloudy, warm and humid with a chance of showers and thunderstorms late.
Temps: 82 to 77
Wind: SE 6-12 MPH
TONIGHT:
Mostly cloudy, warm and humid with scattered showers and thunderstorms, some may be severe with high winds being the main threat.
Low: 70
Wind: SE 5-10 MPH
MONDAY:
Variably cloudy, hot and humid with showers and thunderstorms ending in the morning, then redeveloping in the afternoon. Some may be severe during both periods.
High: 89; Heat Index: 92 to 97
Wind: SW 8-15 MPH
MONDAY NIGHT:
Variably cloudy, warm and humid with any showers and thunderstorms ending early.
Low: 68
Wind: NW 5-10 MPH
TUESDAY:
Variably cloudy, warm and humid with a slight chance of isolated showers and thunderstorms.
High: 86; Heat Index: 88 to 92
Wind: N 6-12 MPH
WEDNESDAY:
Partly sunny, warm and humid.
Low: 64
High: 84
THURSDAY:
Variably cloudy, warm and humid with scattered showers and thunderstorms developing late in the day.
Low: 62
High: 84
FRIDAY:
Partly sunny, hot and humid with a slight chance of isolated showers and thunderstorms.
Low: 68
High: 90; Heat Index: 93 to 98
SATURDAY:
Partly sunny, hot and humid with a slight chance of isolated showers and thunderstorms (scattered showers and thunderstorms developing overnight).
Low: 71
High: 93; Heat Index: 96 to 101
SUNDAY:
Variably cloudy, very warm and humid with scattered showers and thunderstorms, mainly early.
Low: 71
High: 88; Heat Index: 90 to 94
MONDAY:
Variably cloudy, cooler and less humid with a slight chance of showers and thunderstorms.
Low: 64
High: 83
NOTES:
There is a MODERATE RISK for a few intense severe thunderstorms this evening and tonight in far west-central Wisconsin, southeast Minnesota and far northeastern Iowa. There is an ENHANCED RISK for a few severe thunderstorms, along with isolated intense severe thunderstorms this evening and tonight for the rest of western Wisconsin (west of Madison), the rest of eastern Iowa and far northwestern Iliinois. There is a SLIGHT RISK for a few severe thunderstorms over the rest of northern Illinois and southern Wisconsin. A cluster of severe thunderstorms is expected to develop in Minnesota and move toward southern Wisconsin Sunday night. High winds, hail, and heavy rainfall are the main threats, although an isolated tornado threat exists as well, mainly in the late evening. These storms will weaken as they exit the area Monday morning.
There is a MODERATE RISK for a few intense severe thunderstorms tomorrow afternoon and evening for northeastern Illinois. There is an ENHANCED RISK for a few severe thunderstorms along with isolated intense severe thunderstorms for Monday and Monday night for the southern quarter of Wisconsin, far eastern Iowa and western Illinois. There is a SLIGHT RISK for a few severe thunderstorms over the rest of the eastern third of Iowa, and the rest of the southern half of Wisconsin (south of a La Crosse to Wisconsin Dells to Appleton line). There is a MARGINAL RISK for isolated severe thunderstorms for extreme southeastern Minnesota, the rest of the eastern half of Iowa, and most of the northern half of Wisconsin. Severe thunderstorms may be present in extreme southeastern Minnesota, eastern Iowa, southern Wisconsin, and northern Illinois early on Monday morning, with high winds, hail, and heavy rainfall as the main threats. As these storms weaken, they may leave an outflow boundary over the area. As clouds thin and very warm and humid conditions develop, additional severe thunderstorms may develop along this boundary during the afternoon, heading southeastward into eastern Illinois by evening. High winds, hail, and heavy rainfall are the main threats. In addition, a few tornadoes may develop where afternoon severe thunderstorm development takes place, with an isolated strong tornado possible. Also, an intense cluster of severe thunderstorms may then form, resulting in widespread damaging winds as the storms move southeastward through Illinois and Indiana. The ultimate severe weather threat areas for Monday may have to be shifted somewhat north or south, depending on tonight's thunderstorm activity and the position of outflow boundaries on Monday.
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