Alert archive / South Dakota / River Flood Warnings in 2026

River Flood Warning 1, NWS Sioux Falls, SD

June 4, 2026Brookings County, Hamlin County, South Dakota

NWS Sioux Falls, SD issued this river flood warning at Jun 4, 2026, 12:20 PM CDT for Brookings County, Hamlin County, South Dakota. It was in force for 70 hr.

The area

The counties it named.

The facts

Issued: Jun 4, 2026, 12:20 PM CDT (17:20 UTC)
Expired: Jun 7, 2026, 10:01 AM CDT
In force: 70 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Brookings County, SD, Hamlin County, SD

The radar

The Sioux Falls radar (KFSD), 106 km from the middle of the area, began a volume at 17:22 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 river

Written for the forecast point Big Sioux River near Estelline (BSES2).

Action stage: 1642.5 ft
Minor stage: 1644 ft
Moderate stage: 1645.5 ft
Major stage: 1648 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood 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 river flood warning went out at Jun 4, 6:15 AM CDT, 6 hours 5 minutes earlier.

Area forecast discussion, Jun 4, 6:15 AM CDT, 6 hours 5 minutes before

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Hazardous weather outlook, Jun 4, 3:44 AM CDT, 8 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
344 AM CDT Thu Jun 4 2026

MNZ071-072-080-081-097-SDZ038>040-050-052>065-068-050845-
Lincoln-Lyon-Murray-Cottonwood-Pipestone-Beadle-Kingsbury-Brookings-
Gregory-Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-
McCook-Minnehaha-Charles Mix-Douglas-Hutchinson-Bon Homme-
344 AM CDT Thu Jun 4 2026

This Hazardous Weather Outlook is for southwest Minnesota, central
South Dakota, east central South Dakota, south central South Dakota
and southeast South Dakota.

.DAY ONE...Today and tonight.

Strong to severe thunderstorms will again be possible this afternoon
through the evening. The strongest storms may contain hail to ping
pong balls and wind gusts to 65 mph. While tornadoes are unlikely,
and isolated tornado is possible. Additionally, heavy rain will be
possible with smaller pockets of 2 to 4 inches of rain.

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

Hot conditions will be possible this weekend into the middle of next
week. Highs in the 90s are likely Sunday through Wednesday, with
Monday possibly remaining in the 80s.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ001>003-012>014-020>022-031-032-MNZ089-090-098-NEZ013-014-SDZ066-
067-069>071-050845-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Nobles-Jackson-Rock-Dixon-Dakota-Turner-
Lincoln-Yankton-Union-
344 AM CDT Thu Jun 4 2026

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska and southeast South
Dakota.

.DAY ONE...Today and tonight.

Scattered showers and thunderstorms will be possible throughout the
day into tonight. While severe weather is not expected, an isolated
storm could produce hail to the size of half dollars and wind gusts
to 60 mph.

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

While confidence is low a few severe storms will also be possible on
Friday.

Hot conditions will be possible this weekend into the middle of next
week. Highs in the 90s are likely Sunday through Wednesday, with
Monday possibly remaining in the 80s.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 4, 10:26 AM CDT, 1 hour 54 minutes before

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
1026 AM CDT Thu Jun 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0634 PM     Hail             4 NE Broadland          44.53N 98.28W
06/03/2026  M1.00 Inch       Beadle             SD   Public

&&

JC

Local storm report, Jun 4, 10:36 AM CDT, 1 hour 44 minutes before

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
1036 AM CDT Thu Jun 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0643 PM     Hail             8 ESE Hitchcock         44.59N 98.25W
06/03/2026  M0.88 Inch       Beadle             SD   Public

&&

JC

Local storm report, Jun 4, 10:48 AM CDT, 1 hour 32 minutes before

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
1048 AM CDT Thu Jun 4 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     Hail             7 NE Broadland          44.57N 98.27W
06/03/2026  M1.25 Inch       Beadle             SD   Public

&&

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 7:51 PM CDT	Severe Thunderstorm Warning	FSD	Brule	24 min
Jun 3, 7:56 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	49 min
Jun 3, 8:12 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury	32 min
Jun 3, 8:16 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	29 min
Jun 3, 8:34 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Gregory, Jerauld, Sanborn	41 min
Jun 3, 9:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Brule, Charles Mix, Davison, Douglas, Hanson and 3 more	49 min
Jun 3, 9:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Davison, Hanson, Lake, McCook, Miner, Sanborn	45 min
Jun 4, 2:08 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	52 min
Jun 4, 2:47 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury	24 min
Jun 4, 6:40 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	50 min

Nearby

River Flood Warnings in South Dakota, 2026 Every river flood 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.