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Home Return to list Severe Thunderstorm Warning 0268 Issued by the Bismarck Forecast Office
Action: New Issued At: 2026-08-11 20:21:59
278
WUUS53 KBIS 120121
SVRBIS
NDC001-037-085-120200-
/O.NEW.KBIS.SV.W.0268.260812T0121Z-260812T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
821 PM CDT Tue Aug 11 2026
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Southwestern Grant County in south central North Dakota...
Western Sioux County in south central North Dakota...
East Central Adams County in southwestern North Dakota...
* Until 800 PM MDT.
* At 721 PM MDT, a severe thunderstorm was located 15 miles north of
North Lemmon, or 28 miles east of Hettinger, moving southeast at 20
mph.
HAZARD...Ping pong 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...
Mainly rural areas of Southwestern Grant, Western Sioux and East
Central Adams Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 4618 10230 4621 10221 4621 10200 4613 10164
4595 10199
TIME...MOT...LOC 0121Z 301DEG 17KT 4615 10208
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Adam
Action: Continued Issued At: 2026-08-11 20:33:59
624
WWUS53 KBIS 120133
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
833 PM CDT Tue Aug 11 2026
NDC001-037-085-120200-
/O.CON.KBIS.SV.W.0268.000000T0000Z-260812T0200Z/
Adams ND-Grant ND-Sioux ND-
733 PM MDT Tue Aug 11 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 8 PM MDT FOR
SOUTHWESTERN GRANT, WESTERN SIOUX AND EAST CENTRAL ADAMS COUNTIES...
At 733 PM MDT, a severe thunderstorm was located 14 miles northeast
of North Lemmon, or 32 miles east of Hettinger, moving southeast at
30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Mainly rural areas of Southwestern Grant, Western Sioux and East
Central Adams Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 4614 10218 4621 10200 4621 10199 4619 10193
4612 10166 4595 10199
TIME...MOT...LOC 0121Z 303DEG 23KT 4614 10207
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Adam
Action: Continued Issued At: 2026-08-11 20:46:29
997
WWUS53 KBIS 120146
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
846 PM CDT Tue Aug 11 2026
NDC001-037-085-120200-
/O.CON.KBIS.SV.W.0268.000000T0000Z-260812T0200Z/
Adams ND-Grant ND-Sioux ND-
746 PM MDT Tue Aug 11 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 8 PM MDT FOR
SOUTHWESTERN GRANT, WESTERN SIOUX AND EAST CENTRAL ADAMS COUNTIES...
At 746 PM MDT, a severe thunderstorm was located 14 miles northeast
of North Lemmon, or 34 miles east of Hettinger, moving southeast at
20 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...
Mainly rural areas of Southwestern Grant, Western Sioux and East
Central Adams Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 4612 10216 4620 10196 4619 10193 4612 10166
4595 10199
TIME...MOT...LOC 0133Z 306DEG 17KT 4612 10200
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Adam
Action: Continued Issued At: 2026-08-11 20:53:00
077
WWUS53 KBIS 120152
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
852 PM CDT Tue Aug 11 2026
NDC001-037-085-120200-
/O.CON.KBIS.SV.W.0268.000000T0000Z-260812T0200Z/
Adams ND-Grant ND-Sioux ND-
752 PM MDT Tue Aug 11 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 8 PM MDT FOR
SOUTHWESTERN GRANT, WESTERN SIOUX AND EAST CENTRAL ADAMS COUNTIES...
At 752 PM MDT, a severe thunderstorm was located 14 miles northeast
of North Lemmon, or 34 miles east of Hettinger, moving southeast at
20 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Mainly rural areas of Southwestern Grant, Western Sioux and East
Central Adams Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 4606 10210 4616 10191 4609 10173 4595 10199
TIME...MOT...LOC 0146Z 318DEG 15KT 4608 10195
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Adam
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