Scattered thunderstorms developed during the latter half of the afternoon along a slow moving cold front. Dry air poised off the surface allowed for outflow dominant storms to develop, with a brief period of damaging gusty wind.
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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.
Scattered thunderstorms developed during the latter half of the afternoon along a slow moving cold front. Dry air poised off the surface allowed for outflow dominant storms to develop, with a brief period of damaging gusty wind.
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 4, 2:07 PM CST, 2 hours 2 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 307 PM CDT Tue Jul 4 2023 .SHORT TERM...(This Evening through Wednesday) Issued at 254 PM CDT Tue Jul 4 2023 KEY MESSAGES: 1. A few strong to severe storms still possible this evening, though coverage may be decreased from earlier thoughts due to persistent clouds through the day. 2. Cool and dry Wednesday-Thursday. 3. Periodic showers/storms return Friday into the upcoming weekend, with near to slightly below normal temperatures into early next week. -------------------------------- As of 2 pm, the cold front has moved to near Highway 81 in eastern SD, with a plethora of weak outflow boundaries apparent beneath a broad area of residual cloud cover from earlier storms. The impact of these clouds is quite clear in the temperature fields, with 2pm temperatures still in the upper 60s to mid 70s over a large part of the forecast area. As such, available instability has decreased from earlier expectations over much of the forecast area, and the severe risk has decreased along with it. That's not to say we will not see any new storm development through the late afternoon/evening, as the cold front and its associated mid level wave could still trigger scattered to numerous storms as it pushes east. However, the potential for more robust development is waning, and generally confined to areas along/south of Highway 20 where the air mass has seen less impact from our persistent storms. Cold front and associated storms are expected to push southeast of the forecast area by 04Z-06Z, but could see some lingering shower activity in the post-frontal air mass into early Wednesday morning. The rest of Wednesday should be dry and cool, with well below normal temperatures only rebounding into the upper 60s to mid 70s as 850mb temperatures in the single digits drop into parts of the forecast area. .LONG TERM...(Wednesday Night through Tuesday) Issued at 254 PM CDT Tue Jul 4 2023 Cool high pressure remains over the area through Thursday, before retreating east and allowing a southerly flow of somewhat warmer and more moist area to build back into the region. Periodic waves flowing over the area in quasi-zonal flow will bring a few chances for showers/storms to the forecast area Friday through the weekend. These chances are currently focused on Friday/Friday night, and again later Sunday, but timing of the waves is uncertain and these chances will likely fluctuate a bit over the next few days. Temperatures for late this week into early next week do rebound from the cool mid-week stretch, but not seeing any signals that strong warming will take place, with temperatures more likely remaining near or even slightly below normal. && .AVIATION...(For the 18Z TAFS through 18Z Wednesday Afternoon) Issued at 254 PM CDT Tue Jul 4 2023 Scattered storms will remain possible along and ahead of a cold front as it pushes east through this evening. Exact timing of storms for KFSD/KSUX is a little uncertain, but did include a window of possible impact for both locations. Areas of MVFR-IFR conditions are possible into this evening, but as drier high pressure settles southward overnight, expect VFR conditions to prevail through the latter half of this TAF period. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && SHORT TERM...JH LONG TERM...JH AVIATION...Gumbs
Hazardous Weather Outlook National Weather Service Sioux Falls SD 507 AM CDT Tue Jul 4 2023 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ040-055-056-062-066-067-070-071-051015- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Brookings-Lake-Moody-Minnehaha-Turner- Union- 507 AM CDT Tue Jul 4 2023 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, east central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Multiple rounds of scattered showers and thunderstorms are expected to push through the area today. A few storms could become severe with large hail up to ping pong ball size and damaging winds up to 60 mph being possible. Locally heavy rainfall and backbuilding storms could promote some flooding concerns this afternoon. For those spending the 4th fo July holiday outdoors or attending firework shows, continue to stay aware of the forecast. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. More chances for isolated to scattered showers and thunderstorms return this weekend. While severe weather isn't expected locally heavy downpours and frequent lightning will be possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. SDZ038-039-050-052>054-057>061-063>065-068-069-051015- Beadle-Kingsbury-Gregory-Jerauld-Sanborn-Miner-Brule-Aurora-Davison- Hanson-McCook-Charles Mix-Douglas-Hutchinson-Bon Homme-Yankton- 507 AM CDT Tue Jul 4 2023 This Hazardous Weather Outlook is for central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Several clusters of showers and thunderstorms will continue to push through this area this morning. A few storms may become severe with large hail up to the size of quarters and damaging winds up to 60 mph being possible. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. More chances for isolated to scattered showers and thunderstorms return this weekend. While severe weather isn't expected locally heavy downpours and frequent lightning will be possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Sioux Falls radar (KFSD), 120 km away, was scanning. The volume nearest the first event began at 22:10 UTC.
2 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds removed several limbs up to two inches in diameter.
Thunderstorm winds downed several tree limbs up to 3 inches in diameter.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2023Every state in 2023This day in weather historyWarnings in Nebraska, July 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: 1122705, 1122707.