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Severe Thunderstorm Warning 0251
Issued by the Bismarck Forecast Office

Action Issued Starts Expiration
New 2026-08-11 00:18:12 2026-08-11 00:18:00 2026-08-11 01:00:00
Expired 2026-08-11 00:58:13 2026-08-11 01:00:00

Action: New
Issued At: 2026-08-11 00:18:12 

440 
WUUS53 KBIS 110518
SVRBIS
NDC001-037-041-085-110600-
/O.NEW.KBIS.SV.W.0251.260811T0518Z-260811T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
Issued by National Weather Service Grand Forks ND
1118 PM MDT Mon Aug 10 2026

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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4594 10229 4617 10252 4635 10197 4595 10162
TIME...MOT...LOC 0517Z 326DEG 28KT 4622 10211 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Riddle
Action: Expired
Issued At: 2026-08-11 00:58:13 

460 
WWUS53 KBIS 110558
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
Issued by National Weather Service Grand Forks ND
1158 PM MDT Mon Aug 10 2026

NDC001-037-041-085-110607-
/O.EXP.KBIS.SV.W.0251.000000T0000Z-260811T0600Z/
Sioux ND-Hettinger ND-Grant ND-Adams ND-
1158 PM MDT Mon Aug 10 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SIOUX...
SOUTHEASTERN HETTINGER...SOUTHWESTERN GRANT AND SOUTHEASTERN ADAMS
COUNTIES WILL EXPIRE AT MIDNIGHT MDT...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

&&

LAT...LON 4594 10229 4617 10252 4635 10197 4595 10162
TIME...MOT...LOC 0557Z 326DEG 28KT 4598 10187 

$$

Riddle

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