The severe drought that began in June across parts of southeast Minnesota came to end following a period of rain in the middle of August.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
The severe drought that began in June across parts of southeast Minnesota came to end following a period of rain in the middle of August.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Jul 31, 5:56 PM CST, 6 hours 4 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 656 PM CDT Sat Jul 31 2021 .SHORT TERM...(This evening through Sunday) Issued at 133 PM CDT Sat Jul 31 2021 A cold front is dropping into our northern forecast area early this afternoon with scattered convection developing along and ahead of it. Under mostly sunny skies for most of the morning, this area has built around 500-1000 J/kg of MLCAPE so far, perhaps up to 1200 J/kg at its peak this afternoon. Isolated convection has been sparking along this boundary since late morning with modest low to mid-level lapse rates. Convective initiation has been slightly suppressed by a bit of CIN in the 800-700mb layer, but this is quickly eroding with continued strong afternoon heating ahead of the boundary. Indeed, coverage along the boundary is quickly increasing, evidenced by a line of growing towering cu on satellite. CAPE profiles in RAP forecast soundings fall into the tall/skinny category, so with limited updraft momentum (and meager deep layer shear for that matter) do expect storm longevity will be limited overall. That said, there could be a few stronger, more prolonged updrafts within this broken line of convection this afternoon that may pose an isolated damaging wind and/or large hail threat into early evening as the front drops south through the area. This fits in line with SPC's marginal risk for our area into early evening. Waning instability past 7PM should lead to a rapid diminishing trend in lingering convection across our south, with dry conditions heading into the overnight. As for hazy/smoky conditions, the HRRR shows near-surface smoke concentrations at their peak through this afternoon, diminishing a bit in the northerly flow behind the front tonight. There then looks to be marked improvement in both near-surface and vertically- integrated smoke through midday Sunday...at least momentarily. A quieter day on tap for Sunday as surface high pressure builds into the region with cooler conditions / highs in the 70s. Turning even less humid with dewpoints falling into the 50s. With a return to bluer skies, it should make for a very pleasant Sunday afternoon. .LONG TERM...(Sunday night through Saturday) Issued at 133 PM CDT Sat Jul 31 2021 Sunday night through Monday night will feature quiet and seasonably cool conditions, as high pressure migrates from the Northern Plains to the Upper Great Lakes. Will likely continue to deal with smoke with northerly flow aloft, and will have to monitor for more areas seeing impacts to visibilities and air quality with increasing subsidence and lighter winds. The Air Quality Alert continues for MN into Tuesday afternoon. Tuesday there remains a signal in some of the guidance for a backdoor cold front nearing in the wake of passing mid level shortwave. Considerable uncertainty though on extent/location, thus have maintained the slight chance PoPs for some of our northeast service area. Wednesday through Saturday the general theme is a warming trend to around normal, with generally 60s for lows and 80s for highs. Moisture will gradually increase in time with a broad trough developing in the Plains. This along with some ejecting impulses will bring periodic chances for showers and storms, mainly heading into the weekend. && .AVIATION...(For the 00Z TAFS through 00Z Sunday evening) Issued at 657 PM CDT Sat Jul 31 2021 Currently monitoring a broken line of showers and storms north of KLSE. Timing at KLSE would be about 0130Z. However, at this time the SHRA/TSRA look to be just east of KLSE and for now have left it out of the TAF. The activity should also wane with sunset hours. Will monitor for an update as needed. Northerly flow should scour most/all of the wildfire smoke out of the area by Sunday afternoon, thus MVFR smoke vsbys will be improved at sunrise to VFR. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...Kurz LONG TERM...McClure AVIATION...Baumgardt
Hazardous Weather Outlook National Weather Service La Crosse WI 351 AM CDT Sat Jul 31 2021 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-011000- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau- Adams-Vernon-Crawford-Richland-Grant- 351 AM CDT Sat Jul 31 2021 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight A few thunderstorms are possible this afternoon and evening. Severe weather is not expected. Smoke will reduce air quality today. .DAYS TWO THROUGH SEVEN...Sunday through Friday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. Rieck
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
The severe drought that began in June across Mower County came to an end in the middle of August following a period of rain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2021Every state in 2021This day in weather historyWarnings in Minnesota, August 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 981406.