A strong upper-level wave across northeastern South Dakota ignited isolated afternoon thunderstorms near a cold front across south central South Dakota. Storms thrived and became briefly supercellular in a highly sheared and unstable environment while tracking eastward south of South Dakota Highway 46 into the early evening.
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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.
A strong upper-level wave across northeastern South Dakota ignited isolated afternoon thunderstorms near a cold front across south central South Dakota. Storms thrived and became briefly supercellular in a highly sheared and unstable environment while tracking eastward south of South Dakota Highway 46 into the early evening. After a brief decrease in intensity entering Iowa, storms strengthened once again mid to late evening moving east of Cherokee generally along and south of Iowa Highway 3 with a variety of severe weather types.
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, 5:53 PM CST, 3 hours 6 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 653 PM CDT Sat Jun 24 2023 .SHORT TERM...(This Evening through Sunday) Issued at 408 PM CDT Sat Jun 24 2023 THIS AFTERNOON: Initial attention is focused on severe weather threat in northwest Iowa. At 3 PM, a moisture boundary is draped from just east of Sioux City IA to Worthington MN. Nearby and to its east, a cumulus field with occasional orphan anvil puffs suggests lingering potential for isolated severe storms through around 5-6 PM. Big question is whether mid level dry air entraining in can destabilize the profile enough to initiate a few storms in this area, but CAMS aside from the NAM Nest suggest additional storm initiation is unlikely. THIS EVENING: Further west, a mid level shortwave will continue to trigger isolated strong and perhaps even severe Tstorms in south central SD until sunset. The environment is marginal for severe weather with large hail up to half dollar size and damaging wind gusts up to 65 mph. Despite 30 to 40 kts 0-6km shear, the strongest storms will struggle to maintain strong to severe strength with only 500-1000 J/kg MUCAPE, modest mid level lapse rates, and 500-1000 J/kg DCAPE. Late in the evening, the upper trough axis aloft swings in, turning winds northwest. With a trailing low level jet at 30 to 60 kts, the main impact turns to a pretty significant temperature drop into the 60s and 50s, as well as gusty winds kicking in. Expect gusts of 35 to 45 mph to spread in from the northwest overnight. Isolated showers spreading through could mix down an occasional gust up to 50 mph across portions of south central South Dakota. SUNDAY: Notably cooler Sunday in close proximity of the upper low, which meanders through southern Minnesota. Temperatures will generally rise into the 70s Sunday afternoon, perhaps with 80s in parts of northwest Iowa and northeast Nebraska where some sunshine is more likely to peek through. Maintained a low chance of lingering light rain showers or sprinkles collocated with the stratus through most of the day, especially in southwest Minnesota. Northwest winds gusting 20 to 30 mph will persist well into the day, weakening slowly heading into the evening. SUNDAY NIGHT: A low chance of light rain or sprinkles continues with stratus in parts of southwest Minnesota Sunday evening, but skies should gradually clear from the west as drier air entrains in via northerly flow. Expect a cool night with lows in the 50s, maybe even slightly cooler than we have currently forecast. .LONG TERM...(Sunday Night through Saturday) Issued at 408 PM CDT Sat Jun 24 2023 Monday-Wednesday: The previously mentioned upper level low continues to slowly circulate eastwards with a mid-level ridge moving into the region from the west. As heights begin to rise, an abundance of sunshine will lead to warmer temperatures through the midweek with the resulting highs being closer to upper 70s to mid 80s across the area. Looking into the precipitation side of things, a mid-level wave will likely track through the northern plains sometime Tuesday into Wednesday bringing our next precipitation chances. However, medium range guidance does start to diverges on the strength and timing of the wave. As a result, confidence is low in severe weather potential at this time. Nonetheless, scattered showers and thunderstorms will be possible mostly along and west of I-29. Otherwise, more breezy conditions are ahead. On Monday, the surface pressure gradient (SPG) tightens leading to strong northwesterly winds with gusts between 25-35 mph possible along and east of I-29. The afternoon breeziness will continue on Tuesday and Wednesday with the winds expected to shift to the southeast with wind gusts between 20-30 mph possible. Thursday-Saturday: Looking in the later part of the week, the warm conditions continues with daily highs expected to be in the upper 70s to mid 80s across the area. More precipitation chances return Thursday and Friday as an upper level wave moves through the northern plains. However, long range guidance continues to struggle with the timing and location of the wave. As a result, low confidence POPs remain in the forecast with the possibility for isolated to scattered showers and thunderstorms across the area. Otherwise, marginally breezy conditions are expected into the weekend with gusts up to 20 mph possible in the afternoons. && .AVIATION...(For the 00Z TAFS through 00Z Sunday Evening) Issued at 646 PM CDT Sat Jun 24 2023 Isolated showers and Tstorms will continue to track east near Sioux City and Sioux Falls through 03z. The strongest storms may produce hail up to half dollar size, gusty erratic winds, and heavy downpours. Outside of precipitation, VFR conditions and westerly winds with gusts up to 20 kts should prevail until a front moves in late this evening. Expect winds to shift from west to northwest behind the front with gusts of 30 to 40 kts likely overnight. MVFR stratus and rain showers are likely to spread in behind the front overnight, impacting Huron starting 02-04z and Sioux Falls around 06-08z. Stratus should slowly clear out from west to east later on Sunday, lingering longest in southwest Minnesota. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && SHORT TERM...BP LONG TERM...Gumbs AVIATION...BP
Hazardous Weather Outlook National Weather Service Sioux Falls SD 457 PM CDT Sat Jun 24 2023 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-251200- 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- 457 PM CDT Sat Jun 24 2023 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...Tonight. Isolated thunderstorms are expected early this evening. A few of these storms may become strong to severe, producing hail up to golf ball size and wind gusts up to 65 mph. Overnight, northwest winds are expected to gust 35 to 50 mph. .DAYS TWO THROUGH SEVEN...Sunday through Friday. There is a chance for thunderstorms mid week and again Friday. Widespread hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed through 8 PM tonight.
Preliminary Local Storm Report
National Weather Service Sioux Falls SD
459 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0432 PM Hail 6 NE Dante 43.09N 98.09W
06/24/2023 M1.25 inch Bon Homme SD Public
&&
JCPreliminary Local Storm Report
National Weather Service Sioux Falls SD
509 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM Hail 6 SW Springfield 42.79N 97.96W
06/24/2023 M1.25 inch Bon Homme SD Public
&&
JCPreliminary Local Storm Report
National Weather Service Sioux Falls SD
510 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0454 PM Tstm Wnd Gst 5 NE Tyndall 43.04N 97.79W
06/24/2023 E50 MPH Bon Homme SD Trained Spotter
Winds estimated at 50 mph blowing twigs and
debris around. Heavy rain and no hail.
&&
TRMPreliminary Local Storm Report
National Weather Service Sioux Falls SD
531 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0410 PM Hail 2 N Wagner 43.11N 98.30W
06/24/2023 E1.25 inch Charles Mix SD Public
Photo of large hail in persons hand via
social media. Time estimated from radar.
&&
TRMPreliminary Local Storm Report
National Weather Service Sioux Falls SD
604 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0542 PM Hail 5 NW Mission Hill 42.97N 97.37W
06/24/2023 M0.88 inch Yankton SD Public
&&
JCPreliminary Local Storm Report
National Weather Service Sioux Falls SD
727 PM CDT Sat Jun 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0612 PM Hail 3 S Wakonda 42.96N 97.10W
06/24/2023 M0.88 inch Clay SD Public
Picture on social media.
&&
JCThe national radar mosaic for the moment the first event began.
3 hail, 2 thunderstorm wind. Local standard time, as filed.
Quarter size hail resulted in approximately 200 strikes to a deputy squad car. Hail also damaged a nearby deputy's house.
A power pole along 80th Avenue just south of Iowa Highway 3 was leaning, nearby corn was flattened, and large tree branches were broken due to thunderstorm winds.
Crop damage was done by strong winds.
Half-dollar size hail was accompanied by some strong winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2023Every state in 2023This day in weather historyWarnings in Iowa, June 2023
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: 1111727, 1111731, 1111735, 1111734, 1111732.