⚠️ Severe Thunderstorm Warning – Adams, ND; Grant, ND; Sioux, ND – Tuesday, August 11, 2026

Severe Thunderstorm Warning issued August 11 at 8:55PM CDT until August 11 at 9:45PM CDT by NWS Bismarck ND

Details

SVRBIS

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for…
South Central Grant County in south central North Dakota…
Southwestern Sioux County in south central North Dakota…
Eastern Adams County in southwestern North Dakota…

* Until 845 PM MDT.

* At 755 PM MDT, a severe thunderstorm was located 13 miles northeast
of North Lemmon, or 34 miles east of Hettinger, moving southeast at
15 mph.

HAZARD…Tennis ball size hail and 60 mph wind gusts.

SOURCE…Radar indicated.

IMPACT…People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.

* Locations impacted include…
Standing Rock.

Instructions

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.