Severe Thunderstorm Warning — Sioux County, North Dakota
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Current Status
⛈️ Active: Severe Thunderstorm Warning
Severe Thunderstorm Warning issued August 10 at 11:18PM MDT until August 11 at 12:00AM MDT by NWS Bismarck ND
SVRBIS The National Weather Service in Bismarck has issued a * Severe Thunderstorm Warning for... Southwestern Sioux County in south central North Dakota... Southeastern Hettinger County in southwestern North Dakota... Southwestern Grant County in south central North Dakota... Southeastern Adams County in southwestern North Dakota... * Until midnight MDT. * At 1117 PM MDT, a severe thunderstorm was located 8 miles south of Bentley, or 19 miles north of Lemmon, moving southeast at 30 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Lemmon and North Lemmon.
Effective August 11, 2026 at 1:18 AM ET · Expires August 11, 2026 at 2:00 AM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Bismarck ND
Expires
August 11, 2026 at 2:00 AM ET
Last Checked
2 hours ago
What To Do
📋 Official NWS Guidance
For your protection move to an interior room on the lowest floor of a building.
Also In Effect For
This same Severe Thunderstorm Warning also covers:
Other Active Alerts in North Dakota
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Get Severe Thunderstorm Warning Alerts for Sioux County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Severe Thunderstorm Warning mean for Sioux County, North Dakota?
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Is this Severe Thunderstorm Warning currently active?
Yes — this alert is active as of our last check (2 hours ago). It's set to expire August 11, 2026 at 2:00 AM ET.
How do I get notified about Severe Thunderstorm Warning alerts for Sioux County?
Download StormCast free on Google Play and set Sioux County, North Dakota as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Severe Thunderstorm Warning is also in effect for Grant County.