Heat and humidity built up over southern Wisconsin under a persistent ridge of high pressure during the day on June 28th. Actual air temperatures ranged between 91 at Sheboygan, and 100 degrees recorded at both Kenosha Airport and Paddock Lake in Kenosha County, with most locations in the middle to upper 90s for daytime highs. Madison tied a record high for the date with a maximum temperature of 97 degrees, equaling the mark set in 1931. These hot temperatures combined with dew points in the lower to middle 70s to produce maximum heat index values between 100 and 113. The heat broke later that evening as a cold front passed through southern Wisconsin.

Heat in WALWORTH, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 108 in Walworth County during the day on June 28th.

Heat in RACINE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 108 in Racine County during the day on June 28th.

Heat in KENOSHA, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 110 in Kenosha County during the day on June 28th.

Heat in FOND DU LAC, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 101 in Fond Du Lac County during the day on June 28th.

Heat in GREEN LAKE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 102 in Green Lake County during the day on June 28th.

Heat in MARQUETTE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 102 in Marquette County during the day on June 28th.

Heat in SHEBOYGAN, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 103 in Sheboygan County during the day on June 28th.

Heat in SAUK, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 102 in Sauk County during the day on June 28th.

Heat in COLUMBIA, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 103 in Columbia County during the day on June 28th.

Heat in DODGE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: AWOS

Heat index values climbed to 110 in Dodge County during the day on June 28th.

Heat in WASHINGTON, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 111 in Washington County during the day on June 28th.

Heat in OZAUKEE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 110 in Ozaukee County during the day on June 28th.

Heat in IOWA, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: Park/Forest Service

Heat index values climbed to 101 in Iowa County during the day on June 28th.

Heat in DANE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 106 in Dane County during the day on June 28th.

Heat in JEFFERSON, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: Official NWS Observations

Heat index values climbed to 113 in Jefferson County during the day on June 28th.

Heat in WAUKESHA, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 105 in Waukesha County during the day on June 28th.

Heat in MILWAUKEE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: ASOS

Heat index values climbed to 103 in MIlwaukee County during the day on June 28th.

Heat in LAFAYETTE, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: COOP Observer

Heat index values climbed to 105 in Lafayette County during the day on June 28th.

Heat in GREEN, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: AWOS

Heat index values climbed to 103 in Green County during the day on June 28th.

Heat in ROCK, WISCONSIN
From 28-JUN-12 11:00:00 to 28-JUN-12 18:00:00 (CST-6)
Reported by: AWOS

Heat index values climbed to 108 in Rock County during the day on June 28th.