Alert archive / Iowa / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 162, NWS Sioux Falls, SD

July 2, 20264 counties in Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 2, 2026, 8:48 AM CDT for 4 counties in Iowa. It was in force for 42 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: Jul 2, 2026, 8:48 AM CDT (13:48 UTC)
Expired: Jul 2, 2026, 9:30 AM CDT
In force: 42 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA

The radar

The Sioux Falls radar (KFSD), 77 km from the middle of the area, began a volume at 13:49 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 12:00Z, 1.8 hours before the alert went out and 258 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 152 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.0

Open this sounding in Storm Lab

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 Jul 2, 6:47 AM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Jul 2, 6:47 AM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Jul 2, 3:14 AM CDT, 5 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
314 AM CDT Thu Jul 2 2026

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-030815-
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-
314 AM CDT Thu Jul 2 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 thunderstorms will be possible this morning over parts of
northwest Iowa and southwest Minnesota. The main threats will be
quarter sized hail and wind gusts around 50 to 60 mph.

The bigger concern comes this evening into the overnight hours when a
complex of thunderstorms is expected to move into the area from
the northwest. These storms will be capable of producing wind gusts
to 75 mph and heavy rainfall. If a storm can develop this afternoon,
2 inch hail, an isolated tornado and wind gusts to 70 mph are
possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Another round of potential severe storms and heavy rainfall will
move into the area on Friday evening and Friday night. Details are
uncertain at this time. It's important to monitor the forecast over
the coming days heading into the holiday weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

In the hours before

Local storm report, Jul 2, 7:14 AM CDT, 1 hour 34 minutes before

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Local storm report, Jul 2, 7:42 AM CDT, 1 hour 6 minutes before

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Local storm report, Jul 2, 7:45 AM CDT, 1 hour 3 minutes before

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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 1:31 PM CDT	Severe Thunderstorm Warning	FSD	Brule	44 min
Jul 2, 2:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Brule, Jerauld	50 min
Jul 2, 2:56 PM CDT	Severe Thunderstorm Warning	FSD	Jerauld	49 min
Jul 2, 3:06 PM CDT	Tornado Warning	FSD	Jerauld	24 min
Jul 2, 3:23 PM CDT	Tornado Warning	FSD	Jerauld	37 min
Jul 2, 3:41 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	49 min
Jul 2, 3:42 PM CDT	Severe Thunderstorm Warning	FSD	Brule	48 min
Jul 2, 3:51 PM CDT	Tornado Warning	FSD	Beadle, Jerauld	39 min
Jul 2, 4:00 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	45 min
Jul 2, 4:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Beadle, Davison, Jerauld, Sanborn	46 min
Jul 2, 4:30 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	45 min
Jul 2, 4:30 PM CDT	Tornado Warning	FSD	Aurora, Jerauld, Sanborn	45 min
Jul 2, 4:42 PM CDT	Tornado Warning	FSD	Aurora, Jerauld, Sanborn	48 min
Jul 2, 4:46 PM CDT	Tornado Warning	FSD	Beadle, Jerauld, Sanborn	44 min
Jul 2, 4:47 PM CDT	Tornado Warning	FSD	Beadle	43 min
Jul 2, 5:04 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Beadle, Kingsbury	41 min
Jul 2, 5:05 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson, Miner, Sanborn	40 min
Jul 2, 5:10 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Beadle, Kingsbury, Lake, Miner, Sanborn	50 min
Jul 2, 5:37 PM CDT	Tornado Warning	FSD	Beadle, Kingsbury	23 min
Jul 2, 5:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Beadle, Brookings, Kingsbury	49 min
Jul 2, 5:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Hanson, Lake, Miner, Sanborn	46 min
Jul 2, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Hanson, Lake, McCook, Miner, Minnehaha	39 min
Jul 2, 6:13 PM CDT	Tornado Warning	FSD	Lake	32 min
Jul 2, 6:21 PM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Miner, Minnehaha, Moody	39 min
Jul 2, 6:26 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, McCook	49 min
Jul 2, 6:55 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Minnehaha, Moody	50 min
Jul 1, 8:05 PM CDT	Tornado Warning Tornado observed	FSD	Ida, Woodbury	40 min
Jul 1, 8:34 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida	30 min
Jul 2, 4:38 AM CDT	Severe Thunderstorm Warning	FSD	Woodbury	15 min
Jul 2, 7:26 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	21 min
Jul 2, 1:17 PM CDT	Flood Watch	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	16 hr
Jul 2, 3:05 AM CDT	Severe Thunderstorm Warning	FSD	Jackson, Nobles	40 min
Jul 2, 7:18 AM CDT	Severe Thunderstorm Warning	FSD	Jackson	25 min
Jul 2, 10:54 AM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	21 min
Jul 2, 11:13 AM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2026 Every severe thunderstorm 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.