An arc of thunderstorms developed along the nose of the low-level jet across northwest Iowa during the very early hours of June 25. The thunderstorms became nearly stationary for a couple hours, and produced a very narrow band of heavy rainfall with spotty flash flooding.
Every event with a place to put it. 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 FSD wrote it up.
An arc of thunderstorms developed along the nose of the low-level jet across northwest Iowa during the very early hours of June 25. The thunderstorms became nearly stationary for a couple hours, and produced a very narrow band of heavy rainfall with spotty flash flooding.
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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jun 24, 10:36 PM CST, 3 hours 24 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1136 PM CDT Fri Jun 24 2022 .SHORT TERM...(This Evening through Saturday) Issued at 253 PM CDT Fri Jun 24 2022 Quiet conditions continue across the region, with latest observations showing mostly sunny skies and highs in the upper 80s to low 90s. As alluded to in the previous discussion, expect a sfc cold front to advance eastward this afternoon, causing showers and storms, a few of which could become severe, to be possible this evening and into the overnight period. With southerly flow in place, certainly have enough warm/moist air in place to fuel instability - as most guidance has roughly 2500-3500 J/kg of CAPE. That being said, still remain relatively lacking when it comes to shear, with soundings consistently showing winds ~20kts from the sfc to near 500 mb. As a result, will likely see storms struggle to organize. Nonetheless, with enough instability in place, still believe the atmosphere remains primed enough to support the development of a few single or multicell storms west of I-29 after sunset, which will be capable of producing ping pong ball sized hail and gusts as high as 70 mph. As the front continues to propagate eastward, may see these storms try to develop into a line. At this time, believe the chances for seeing a strong linear feature or bowing segment will remain just north of our area along the ND/MN border. However, if things were to organize enough across our area, do think it's worth noting that the primary hazard would then become more focused on damaging winds. Thus, with the greatest severe threat expected to occur during the overnight period (9 PM to 5 AM), we strongly encourage you to have multiple ways to receive warnings, in the event that storms do become severe! Otherwise, look for dry conditions to gradually return from west to east near daybreak Saturday as the aforementioned cold front departs the region. Northwesterly winds behind the front will also become quite breezy, with gusts between 25 to 35 mph possible through the afternoon. As a result, should see notably cooler temperatures prevail across the region - with highs currently forecast to only rise into the 70s to low 80s. .LONG TERM...(Saturday Night through Friday) Issued at 253 PM CDT Fri Jun 24 2022 Look for cooler conditions to continue Sunday, as highs remain in the 70s. Dewpoints will also be quite pleasant, with values largely in the 40s, which coupled with breezy northwesterly winds will be a welcomed reprieve from the heat and humidity experienced earlier this week. Heading into the new week, expect temperatures to slowly moderate back into the 80s to low 90s with the aid of southerly flow. Upper level ridging over the western CONUS will slowly drift eastward during this time, causing highs to once again rise into the upper 80s to upper 90s by mid week. Otherwise, look for unsettled weather to return by the end of the period as an upper level trough ejects eastward across the central CONUS. Still have quite a bit of time to narrow in on the specific details though, so have opted to leave model blend of PoPs as is until higher confidence can be achieved. && .AVIATION...(For the 06Z TAFS through 06Z Saturday night) Issued at 1137 PM CDT Fri Jun 24 2022 Areas of thunderstorms will move across the forecast area through 12Z-14Z, bringing a potential for isolated stronger wind gusts, along with MVFR-IFR ceilings and visibility. MVFR ceilings may linger behind the storms into the mid-late morning, gradually lifting/decreasing in coverage as northwest winds increase and bring drier air into the region by Saturday afternoon. Northwest wind gusts should reach 25-30kt through the afternoon, with gusts quickly diminishing toward sunset. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...SST LONG TERM...SST AVIATION...JH
Hazardous Weather Outlook National Weather Service Sioux Falls SD 334 AM CDT Fri Jun 24 2022 MNZ071-SDZ038>040-050-052>054-057>059-063-064-250845- Lincoln-Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner- Brule-Aurora-Davison-Charles Mix-Douglas- 334 AM CDT Fri Jun 24 2022 This Hazardous Weather Outlook is for portions of southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Scattered strong to severe storms will be possible late this afternoon into the evening. The main threats with these storms will be hail to ping pong ball and wind gusts to 70 mph. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ001>003-012>014-020>022-031-032-MNZ072-080-081-089-090-097-098- NEZ013-014-SDZ055-056-060>062-065>071-250845- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Lake-Moody-Hanson-McCook-Minnehaha- Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Union- 334 AM CDT Fri Jun 24 2022 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, east central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Isolated strong to severe storms will be possible this evening through late tonight. The main threats with these storms will be hail to the size of half dollars and wind gusts to 65 mph. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
124 AM CDT SAT JUN 25 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0112 AM HAIL BONESTEEL 43.08N 98.95W
06/25/2022 E1.00 INCH GREGORY SD TRAINED SPOTTER
&&
ATThe national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Rainfall of 2.1 inches in a little over an hour resulted in water flowing over 440th Street.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2022Every state in 2022This day in weather historyWarnings in Iowa, June 2022
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: 1037758.