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

Severe Thunderstorm Warning issued August 11 at 8:07PM CDT until August 11 at 9:00PM CDT by NWS Bismarck ND

Details

SVRBIS

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for…
East Central Grant County in south central North Dakota…
Southeastern Morton County in south central North Dakota…
Northeastern Sioux County in south central North Dakota…

* Until 900 PM CDT /800 PM MDT/.

* At 807 PM CDT /707 PM MDT/, a severe thunderstorm was located 7
miles northeast of Flasher, or 25 miles south of Mandan, moving
southeast at 30 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…
Flasher, Solen, Cannon Ball, Prairie Knights Resort, Breien and
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.