Marginal mixed-layer instability and effective bulk shear around 30 knots led to weak organization of scattered storms during the late afternoon and evening hours from eastern South Dakota into southwest Minnesota. The strongest cells produced up to quarter size hail.
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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.
Marginal mixed-layer instability and effective bulk shear around 30 knots led to weak organization of scattered storms during the late afternoon and evening hours from eastern South Dakota into southwest Minnesota. The strongest cells produced up to quarter size hail. A deeper sub-cloud dry layer supported spotty stronger wind gusts.
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 Jul 6, 1:11 PM CST, 3 hours 37 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Sioux Falls SD 1245 PM CDT Sat Jul 6 2024 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-071745- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory- Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 1245 PM CDT Sat Jul 6 2024 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...This afternoon and tonight. Greater coverage of showers and thunderstorms is expected this afternoon and evening, with a Level 1 of 5 risk for severe storms. Isolated large hail up to ping pong ball size, along with damaging winds gusts to 65 mph are the primary threats. While unlikely, a landspout cannot be ruled out. Locally heavy rain is also possible with stronger storms. The strongest storms are expected between 3 pm and 10 pm. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Chances for mainly afternoon to early evening showers and storms continue early next week, Sunday through Tuesday. While isolated lightning is a threat with any storm, severe weather is not expected. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Any reports of severe weather are appreciated.
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
523 PM CDT Sat Jul 6 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 PM Tstm Wnd Gst Tracy 44.24N 95.62W
07/06/2024 M54 MPH Lyon MN AWOS
A 54 mph wind gust was recorded at the Tracy
Municipal Airport.
&&
IGThe Sioux Falls radar (KFSD), 107 km away, was scanning. The volume nearest the first event began at 22:46 UTC.
1 hail. Local standard time, as filed.
Crop damage monetary losses are an estimate using data from the U.S. Department of Agriculture.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2024Every state in 2024This day in weather historyWarnings in South Dakota, July 2024
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 2026-10-01. Each event’s entry at NCEI: 1200006.