Alert archive / South Dakota / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 111, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 2025, 10:30 PM CDT for Gregory County, South Dakota. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 28, 2025, 10:30 PM CDT (03:30 UTC)
- Expired
- Jun 28, 2025, 11:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Gregory County, SD
The radar
The North Platte radar (KLNX), 178 km from the middle of the area, began a volume at 03:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 3.5 hours before the alert went out and 200 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2696 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1383 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 7.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jun 28, 3:19 PM CDT, 7 hours 11 minutes earlier.
Area forecast discussion, Jun 28, 3:19 PM CDT, 7 hours 11 minutes before
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</html>Hazardous weather outlook, Jun 28, 4:18 AM CDT, 18 hours 12 minutes before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 10:33 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 42 min |
| Jun 28, 10:53 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 37 min |
| Jun 28, 11:26 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury, Lake, Moody | 49 min |
| Jun 28, 11:31 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury, Lake, Miner | 44 min |
| Jun 29, 12:14 AM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 46 min |
| Jun 29, 12:50 AM CDT | Severe Thunderstorm Warning | FSD | Hanson, Miner | 25 min |
| Jun 29, 1:23 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Turner, Yankton | 52 min |
| Jun 29, 1:57 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner, Yankton | 33 min |
| Jun 29, 2:09 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 36 min |
| Jun 29, 2:42 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Union, Yankton | 34 min |
| Jun 29, 6:07 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Jerauld | 23 min |
| Jun 29, 6:17 AM CDT | River Flood Warning | FSD | Brookings, Hamlin | 6 days |
| Jun 29, 6:29 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Jerauld, Sanborn | 31 min |
| Jun 29, 7:58 AM CDT | River Flood Warning | FSD | Brookings | 21 days |
| Jun 29, 9:30 AM CDT | River Flood Warning | FSD | Brookings, Moody | 11 days |
| Jun 29, 10:20 AM CDT | River Flood Warning | FSD | Brookings | 60 hr |
| Jun 29, 3:38 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Plymouth, Sioux | 37 min |
| Jun 29, 4:02 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 43 min |
| Jun 29, 4:06 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien, Plymouth, Sioux | 39 min |
| Jun 29, 4:42 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida, Plymouth, Woodbury | 48 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.