Alert archive / North Dakota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 250, NWS Bismarck, ND

August 17, 20254 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 17, 2025, 3:56 AM CDT for 4 counties in North Dakota. It was in force for 64 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
Aug 17, 2025, 3:56 AM CDT (08:56 UTC)
Expired
Aug 17, 2025, 5:00 AM CDT
In force
64 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon
Damage threat
Considerable
Hail
0.75 in
Wind
70.0 mph

Counties Emmons County, ND, Grant County, ND, Morton County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 50 km from the middle of the area, began a volume at 08:58 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 16, 10:59 PM CDTSevere Thunderstorm WatchSPC8 hr

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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 3:05 AM CDT, 51 minutes earlier.

Area forecast discussion, Aug 17, 3:05 AM CDT, 51 minutes before
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Hazardous weather outlook, Aug 17, 1:06 AM CDT, 2 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Bismarck ND
106 AM CDT Sun Aug 17 2025

NDZ001-009-017>020-031>037-040>048-050-051-180615-
Divide-Williams-McKenzie-Dunn-Mercer-Oliver-Golden Valley-
Billings-Stark-Morton-Burleigh-Kidder-Stutsman-Slope-Hettinger-
Grant-Bowman-Adams-Sioux-Emmons-Logan-La Moure-McIntosh-Dickey-
106 AM CDT Sun Aug 17 2025 /1206 AM MDT Sun Aug 17 2025/

This Hazardous Weather Outlook is for portions of northwest North
Dakota, south central North Dakota, southeast North Dakota, and
southwest North Dakota.

.DAY ONE...Tonight

Isolated strong to severe thunderstorms are possible tonight.
Expected hazards include hail up to the size of quarters, damaging
winds as high as 60 mph, and torrential rainfall.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Isolated strong to severe thunderstorms are possible across
western North Dakota Sunday evening and night.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report severe weather and excessive
rain amounts to the National Weather Service at 800-247-0212 or
on social media pages.

NDZ002>005-010>013-021>023-025-180615-
Burke-Renville-Bottineau-Rolette-Mountrail-Ward-McHenry-Pierce-
McLean-Sheridan-Wells-Foster-
106 AM CDT Sun Aug 17 2025

This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
and southeast North Dakota.

.DAY ONE...Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report excessive rain amounts to the
National Weather Service at 800-247-0212 or on social media pages.

NH

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 2:59 AM CDTSevere Thunderstorm WarningBISGrant, Sioux61 min
Aug 17, 4:31 AM CDTSevere Thunderstorm WarningBISEmmons, Sioux29 min
Aug 17, 4:57 AM CDTSevere Thunderstorm WarningBISEmmons, Logan, McIntosh48 min
Aug 17, 5:43 AM CDTSpecial Weather StatementBISKidder, Logan, McIntosh32 min
Aug 17, 5:55 AM CDTSpecial Weather StatementBISBurleigh35 min
Aug 17, 6:17 AM CDTSpecial Weather StatementBISDickey43 min
Aug 17, 10:29 AM CDTSpecial Weather StatementBISDickey31 min
Aug 17, 10:57 AM CDTSpecial Weather StatementBISDickey33 min

Nearby

Severe Thunderstorm Warnings in North 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; radar from the NEXRAD Level II archive.