Alert archive / South Dakota / Freeze Warnings in 2026
Freeze Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this freeze warning at May 19, 2026, 2:43 AM CDT for 5 counties in South Dakota. It took effect at May 20, 2026, 1:00 AM CDT. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 19, 2026, 2:43 AM CDT (07:43 UTC)
- In effect from
- May 20, 2026, 1:00 AM CDT
- Expired
- May 20, 2026, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Sioux Falls, SD
Counties Beadle County, SD, Brookings County, SD, Jerauld County, SD, Kingsbury County, SD, Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 116 km from the middle of the area, began a volume at 07:45 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
Minneapolis, MN (KMPX), launched 00:00Z, 7.7 hours before the alert went out and 344 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 689 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
What forecasters said that day
The local office's own words before this freeze 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 freeze warning went out at May 18, 6:42 PM CDT, 8 hours 1 minute earlier.
Area forecast discussion, May 18, 6:42 PM CDT, 8 hours 1 minute before
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</html>Hazardous weather outlook, May 18, 3:31 AM CDT, 23 hours 12 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 331 AM CDT Mon May 18 2026 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-190845- 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- 331 AM CDT Mon May 18 2026 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...Today and tonight. Scattered showers and isolated thunderstorms return to the area this afternoon through tonight. A few strong to severe storms are possible along and southeast of a line from Wayne to Sheldon to Windom. If strong storms develop, ping pong ball sized hail and 60 mph wind gusts are the main threats. However, locally heavy rainfall and a tornado are possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Chances for showers and thunderstorms return Thursday through Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 2:43 AM CDT | Frost Advisory | FSD | Aurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 13 more | 29 hr |
Nearby
Freeze Warnings in South Dakota, 2026Every freeze warning in 2026
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.