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Severe Thunderstorm Warning 0263
Issued by the Bismarck Forecast Office

Action Issued Starts Expiration
New 2026-08-11 19:26:57 2026-08-11 19:26:00 2026-08-11 20:15:00
Continued 2026-08-11 19:43:57 2026-08-11 20:15:00
Cancelled 2026-08-11 19:43:57 2026-08-11 20:15:00
Continued 2026-08-11 19:55:28 2026-08-11 20:15:00
Expired 2026-08-11 20:15:58 2026-08-11 20:15:00


Action: New
Issued At: 2026-08-11 19:26:57

457 
WUUS53 KBIS 120026
SVRBIS
NDC001-011-087-120115-
/O.NEW.KBIS.SV.W.0263.260812T0026Z-260812T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
726 PM CDT Tue Aug 11 2026

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Western Adams County in southwestern North Dakota...
  Northeastern Bowman County in southwestern North Dakota...
  Southern Slope County in southwestern North Dakota...

* Until 715 PM MDT.

* At 626 PM MDT, a severe thunderstorm was located 6 miles north of
  Scranton, or 13 miles east of Bowman, moving southeast at 25 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...
  Scranton, Reeder, Bucyrus, Gascoyne and Buffalo Springs.

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 4623 10336 4634 10325 4622 10258 4596 10283
TIME...MOT...LOC 0026Z 294DEG 22KT 4623 10313

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 19:43:57

178 
WWUS53 KBIS 120043
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
743 PM CDT Tue Aug 11 2026

NDC087-120053-
/O.CAN.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Slope ND-
643 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHERN SLOPE
COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. A Severe Thunderstorm
Warning still remains in effect for northeastern Slope County.

&&

LAT...LON 4618 10326 4628 10316 4628 10299 4620 10260
      4596 10283
TIME...MOT...LOC 0026Z 294DEG 22KT 4623 10313

$$


NDC001-011-120115-
/O.CON.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Adams ND-Bowman ND-
643 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
WESTERN ADAMS AND NORTHEASTERN BOWMAN COUNTIES...

At 643 PM MDT, a severe thunderstorm was located 6 miles northeast of
Scranton, or 15 miles east of Bowman, 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...
  Scranton, Reeder, Bucyrus, Gascoyne and Buffalo Springs.

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 4618 10326 4628 10316 4628 10299 4620 10260
      4596 10283
TIME...MOT...LOC 0026Z 301DEG 17KT 4626 10318

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: Cancelled
Issued At: 2026-08-11 19:43:57

178 
WWUS53 KBIS 120043
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
743 PM CDT Tue Aug 11 2026

NDC087-120053-
/O.CAN.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Slope ND-
643 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHERN SLOPE
COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. A Severe Thunderstorm
Warning still remains in effect for northeastern Slope County.

&&

LAT...LON 4618 10326 4628 10316 4628 10299 4620 10260
      4596 10283
TIME...MOT...LOC 0026Z 294DEG 22KT 4623 10313

$$


NDC001-011-120115-
/O.CON.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Adams ND-Bowman ND-
643 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
WESTERN ADAMS AND NORTHEASTERN BOWMAN COUNTIES...

At 643 PM MDT, a severe thunderstorm was located 6 miles northeast of
Scranton, or 15 miles east of Bowman, 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...
  Scranton, Reeder, Bucyrus, Gascoyne and Buffalo Springs.

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 4618 10326 4628 10316 4628 10299 4620 10260
      4596 10283
TIME...MOT...LOC 0026Z 301DEG 17KT 4626 10318

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 19:55:28

430 
WWUS53 KBIS 120055
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
755 PM CDT Tue Aug 11 2026

NDC001-011-120115-
/O.CON.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Adams ND-Bowman ND-
655 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR
WESTERN ADAMS AND EAST CENTRAL BOWMAN COUNTIES...

At 655 PM MDT, a severe thunderstorm was located 6 miles northwest of
Reeder, or 19 miles east of Bowman, moving southeast at 20 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...
  Scranton, Reeder, Bucyrus and Gascoyne.

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 4628 10300 4628 10299 4620 10260 4596 10283
      4616 10322 4628 10305
TIME...MOT...LOC 0043Z 301DEG 17KT 4621 10308

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Adam


Action: Expired
Issued At: 2026-08-11 20:15:58

195 
WWUS53 KBIS 120115
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
815 PM CDT Tue Aug 11 2026

NDC001-011-120125-
/O.EXP.KBIS.SV.W.0263.000000T0000Z-260812T0115Z/
Adams ND-Bowman ND-
715 PM MDT Tue Aug 11 2026

...SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR WESTERN ADAMS AND EAST
CENTRAL BOWMAN COUNTIES...

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 has been allowed to expire. However, small
hail is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1200 AM MDT for a
portion of southwest North Dakota.

&&

LAT...LON 4628 10300 4628 10299 4620 10260 4596 10283
      4616 10322 4628 10305
TIME...MOT...LOC 0055Z 301DEG 17KT 4618 10301

$$

Adam



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