Tuesday August 2nd was already hot and muggy across much of southern and central Minnesota, but a brief surge in humidity during the very late afternoon and early evening pushed dew point temperatures 2-5 degrees F higher. As a result, even though the daily high temperature had already been reached across most of the area, heat index values continued rising and peaked between 5 and 8 PM at many locations. With air temperatures still in the lower to mid-90s F and dew point temperatures in the mid to upper 70s F, heat index values soared into the 105 to 115 F range, with the high value of 115 F recorded at Hutchinson.
Heat Index values of 100 F or higher can be expected most years in southern and central Minnesota, and sometimes occur multiple times per year . Values into the 110s F, however, are far less common, and generally occur only every few to several years. The last widespread occurrence of these values was in July of 2019, during an event that was a bit more intense than this one, with temperatures in the mid-90s and dew points around 80 F.
The National Weather Service in Chanhassen has provided the following summaries of maximum Heat Index values from Tuesday evening in southern and central Minnesota. The values are provided in ranked order, and also by county.
Public Information Statement National Weather Service Twin Cities/Chanhassen MN 854 PM CDT Tue Aug 2 2022 ...MAXIMUM HEAT INDEX REPORTS TUESDAY... Location Heat Idx. Time/Date Provider Hutchinson AP 115 F 0455 PM 08/02 AWOS Rockford 113 F 0630 PM 08/02 MESOWEST Madison AP 113 F 0615 PM 08/02 AWOS Redwood Falls AP 113 F 0653 PM 08/02 ASOS Glencoe AP 112 F 0535 PM 08/02 AWOS Buffalo AP 111 F 0655 PM 08/02 AWOS Granite Falls AP 111 F 0655 PM 08/02 AWOS 1 W Becker 110 F 0655 PM 08/02 NDAWN Hanover 110 F 0650 PM 08/02 MESOWEST Saint Bonifacius 110 F 0639 PM 08/02 MESOWEST Falcon Heights 110 F 0711 PM 08/02 MESOWEST Blaine 110 F 0710 PM 08/02 MESOWEST Princeton AP 110 F 0735 PM 08/02 AWOS Santiago 3E 109 F 0520 PM 08/02 RAWS Chanhassen NWS 109 F 0650 PM 08/02 MESOWEST Msp Airport 109 F 0710 PM 08/02 MESOWEST Minnetonka 109 F 0630 PM 08/02 MESOWEST Dayton 109 F 0639 PM 08/02 MESOWEST Cambridge AP 109 F 0435 PM 08/02 AWOS Medina 108 F 0650 PM 08/02 MESOWEST Minnetrista 108 F 0700 PM 08/02 MESOWEST Fridley 108 F 0710 PM 08/02 MESOWEST Edina 108 F 0700 PM 08/02 MESOWEST Bloomington 108 F 0640 PM 08/02 MESOWEST Corcoran 108 F 0700 PM 08/02 MESOWEST Fairmont AP 108 F 0356 PM 08/02 AWOS Mankato AP 108 F 0456 PM 08/02 AWOS 2 SE Royalton 107 F 0530 PM 08/02 NDAWN Plymouth 107 F 0710 PM 08/02 MESOWEST Hopkins 107 F 0640 PM 08/02 MESOWEST Blaine AP 107 F 0650 PM 08/02 AWOS Eden Prairie AP 107 F 0653 PM 08/02 ASOS Litchfield AP 107 F 0515 PM 08/02 AWOS Crystal AP 107 F 0653 PM 08/02 ASOS Montevideo AP 107 F 0415 PM 08/02 AWOS Osceola AP 107 F 0655 PM 08/02 AWOS New Ulm AP 107 F 0515 PM 08/02 AWOS Litchfield 3S 107 F 0511 PM 08/02 RAWS Olivia AP 106 F 0715 PM 08/02 AWOS St. Cloud AP 106 F 0453 PM 08/02 ASOS Carver 3S 106 F 0649 PM 08/02 RAWS 5 WSW Genola 105 F 0545 PM 08/02 NDAWN Maple Grove 105 F 0740 PM 08/02 MESOWEST Orono 105 F 0650 PM 08/02 MESOWEST Greenfield 105 F 0700 PM 08/02 MESOWEST Rosemount 105 F 0630 PM 08/02 MESOWEST Willmar AP 105 F 0715 PM 08/02 AWOS St. James AP 105 F 0415 PM 08/02 AWOS Maple Lake AP 105 F 0542 PM 08/02 ASOS St. Paul Dwtn AP 105 F 0653 PM 08/02 ASOS 7 SE Onamia Mns No. 1 105 F 0636 PM 08/02 RAWS Wyoming 6WSW 104 F 0506 PM 08/02 RAWS Appleton AP 104 F 0513 PM 08/02 AWOS Albert Lea AP 103 F 0535 PM 08/02 AWOS Canby AP 103 F 0302 PM 08/02 AWOS Glenwood AP 103 F 0535 PM 08/02 AWOS Mora AP 103 F 0655 PM 08/02 AWOS Owatonna AP 103 F 0453 PM 08/02 AWOS Paynesville AP 103 F 0255 PM 08/02 AWOS Little Falls 2SSE 103 F 0507 PM 08/02 RAWS Benson AP 102 F 0617 PM 08/02 AWOS Sauk Centre AP 102 F 0515 PM 08/02 AWOS Faribault AP 102 F 0535 PM 08/02 AWOS Little Falls AP 102 F 0535 PM 08/02 AWOS South St. Paul AP 102 F 0535 PM 08/02 AWOS Stanton AP 102 F 0535 PM 08/02 AWOS 2 NW Browerville 101 F 0515 PM 08/02 NDAWN Westport 100 F 0500 PM 08/02 NDAWN Mora 1ENE 100 F 0808 PM 08/02 RAWS Long Prairie AP 100 F 0435 PM 08/02 AWOS Waseca AP 100 F 0635 PM 08/02 AWOS Alexandria MN ASOS 100 F 0453 PM 08/02 ASOS Lakeville AP 100 F 0615 PM 08/02 AWOS Red Wing AP 99 F 0535 PM 08/02 AWOS Camp Ripley 99 F 0656 PM 08/02 AWOS Lake Elmo AP 98 F 0755 PM 08/02 AWOS Eau Claire AP 98 F 0456 PM 08/02 ASOS Menomonie AP 98 F 0535 PM 08/02 AWOS Morris AP 98 F 0715 PM 08/02 AWOS Rush City AP 98 F 0635 PM 08/02 ASOS Star Prairie 98 F 0508 PM 08/02 RAWS New Richmond AP 96 F 0655 PM 08/02 AWOS Camp Ripley 96 F 0256 PM 08/02 AWOS Chetek AP 95 F 0515 PM 08/02 AWOS Ganoe Hill 95 F 0507 PM 08/02 RAWS Rice Lake AP 94 F 0715 PM 08/02 AWOS Augusta 1NW 93 F 0505 PM 08/02 RAWS Cumberland AP 90 F 0655 PM 08/02 AWOS Tony AP 88 F 0755 PM 08/02 AWOS Ladysmith 2SW 87 F 0805 PM 08/02 RAWS ...MAXIMUM HEAT INDEX REPORTS BY COUNTY... Location Heat Idx. Time/Date Provider ...Minnesota... ...Anoka County... Blaine 110 F 0710 PM 08/02 MESOWEST Fridley 108 F 0710 PM 08/02 MESOWEST Blaine AP 107 F 0650 PM 08/02 AWOS Wyoming 6WSW 104 F 0506 PM 08/02 RAWS ...Benton County... 2 SE Royalton 107 F 0530 PM 08/02 NDAWN ...Blue Earth County... Mankato AP 108 F 0456 PM 08/02 AWOS ...Brown County... New Ulm AP 107 F 0515 PM 08/02 AWOS ...Carver County... Chanhassen NWS 109 F 0650 PM 08/02 MESOWEST Carver 3S 106 F 0649 PM 08/02 RAWS ...Chippewa County... Montevideo AP 107 F 0415 PM 08/02 AWOS ...Chisago County... Rush City AP 98 F 0635 PM 08/02 ASOS ...Dakota County... Rosemount 105 F 0630 PM 08/02 MESOWEST South St. Paul AP 102 F 0535 PM 08/02 AWOS Lakeville AP 100 F 0615 PM 08/02 AWOS ...Douglas County... Alexandria MN ASOS 100 F 0453 PM 08/02 ASOS ...Freeborn County... Albert Lea AP 103 F 0535 PM 08/02 AWOS ...Goodhue County... Stanton AP 102 F 0535 PM 08/02 AWOS ...Hennepin County... Hanover 110 F 0650 PM 08/02 MESOWEST Saint Bonifacius 110 F 0639 PM 08/02 MESOWEST Msp Airport 109 F 0710 PM 08/02 MESOWEST Minnetonka 109 F 0630 PM 08/02 MESOWEST Dayton 109 F 0639 PM 08/02 MESOWEST Medina 108 F 0650 PM 08/02 MESOWEST Minnetrista 108 F 0700 PM 08/02 MESOWEST Edina 108 F 0700 PM 08/02 MESOWEST Bloomington 108 F 0640 PM 08/02 MESOWEST Corcoran 108 F 0700 PM 08/02 MESOWEST Plymouth 107 F 0710 PM 08/02 MESOWEST Hopkins 107 F 0640 PM 08/02 MESOWEST Eden Prairie AP 107 F 0653 PM 08/02 ASOS Crystal AP 107 F 0653 PM 08/02 ASOS Maple Grove 105 F 0740 PM 08/02 MESOWEST Orono 105 F 0650 PM 08/02 MESOWEST ...Isanti County... Cambridge AP 109 F 0435 PM 08/02 AWOS ...Kanabec County... Mora AP 103 F 0655 PM 08/02 AWOS Mora 1ENE 100 F 0808 PM 08/02 RAWS ...Kandiyohi County... Willmar AP 105 F 0715 PM 08/02 AWOS ...Lac qui Parle County... Madison AP 113 F 0615 PM 08/02 AWOS ...Martin County... Fairmont AP 108 F 0356 PM 08/02 AWOS ...McLeod County... Hutchinson AP 115 F 0455 PM 08/02 AWOS Glencoe AP 112 F 0535 PM 08/02 AWOS ...Meeker County... Litchfield AP 107 F 0515 PM 08/02 AWOS Litchfield 3S 107 F 0511 PM 08/02 RAWS ...Mille Lacs County... Princeton AP 110 F 0735 PM 08/02 AWOS 7 SE Onamia Mns No. 1 105 F 0636 PM 08/02 RAWS ...Morrison County... 5 WSW Genola 105 F 0545 PM 08/02 NDAWN Little Falls 2SSE 103 F 0507 PM 08/02 RAWS Little Falls AP 102 F 0535 PM 08/02 AWOS Camp Ripley 99 F 0656 PM 08/02 AWOS Camp Ripley 96 F 0256 PM 08/02 AWOS ...Pope County... Glenwood AP 103 F 0535 PM 08/02 AWOS Westport 100 F 0500 PM 08/02 NDAWN ...Ramsey County... Falcon Heights 110 F 0711 PM 08/02 MESOWEST St. Paul Dwtn AP 105 F 0653 PM 08/02 ASOS ...Redwood County... Redwood Falls AP 113 F 0653 PM 08/02 ASOS ...Renville County... Olivia AP 106 F 0715 PM 08/02 AWOS ...Rice County... Faribault AP 102 F 0535 PM 08/02 AWOS ...Sherburne County... 1 W Becker 110 F 0655 PM 08/02 NDAWN Santiago 3E 109 F 0520 PM 08/02 RAWS St. Cloud AP 106 F 0453 PM 08/02 ASOS ...Stearns County... Paynesville AP 103 F 0255 PM 08/02 AWOS Sauk Centre AP 102 F 0515 PM 08/02 AWOS ...Steele County... Owatonna AP 103 F 0453 PM 08/02 AWOS ...Stevens County... Morris AP 98 F 0715 PM 08/02 AWOS ...Swift County... Appleton AP 104 F 0513 PM 08/02 AWOS Benson AP 102 F 0617 PM 08/02 AWOS ...Todd County... 2 NW Browerville 101 F 0515 PM 08/02 NDAWN Long Prairie AP 100 F 0435 PM 08/02 AWOS ...Waseca County... Waseca AP 100 F 0635 PM 08/02 AWOS ...Washington County... Lake Elmo AP 98 F 0755 PM 08/02 AWOS ...Watonwan County... St. James AP 105 F 0415 PM 08/02 AWOS ...Wright County... Rockford 113 F 0630 PM 08/02 MESOWEST Buffalo AP 111 F 0655 PM 08/02 AWOS Greenfield 105 F 0700 PM 08/02 MESOWEST Maple Lake AP 105 F 0542 PM 08/02 ASOS ...Yellow Medicine County... Granite Falls AP 111 F 0655 PM 08/02 AWOS Canby AP 103 F 0302 PM 08/02 AWOS Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official. $$ Borghoff
Updated August 4, 2022