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Monday, Aug 10, 2026 02:14:27

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Severe Thunderstorm Warning 0293
Issued by the Denver / Boulder Forecast Office

Action Issued Starts Expiration
New 2026-08-09 21:28:35 2026-08-09 21:28:00 2026-08-09 22:15:00
Continued 2026-08-09 21:38:36 2026-08-09 22:15:00
Cancelled 2026-08-09 21:47:36 2026-08-09 22:15:00
Continued 2026-08-09 21:47:36 2026-08-09 22:15:00
Continued 2026-08-09 22:00:36 2026-08-09 22:15:00
Expired 2026-08-09 22:14:37 2026-08-09 22:15:00


Action: New
Issued At: 2026-08-09 21:28:35

093 
WUUS55 KBOU 100228
SVRBOU
COC075-115-100315-
/O.NEW.KBOU.SV.W.0293.260810T0228Z-260810T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
828 PM MDT Sun Aug 9 2026

The National Weather Service in Denver has issued a

* Severe Thunderstorm Warning for...
  Northeastern Logan County in northeastern Colorado...
  Western Sedgwick County in northeastern Colorado...

* Until 915 PM MDT.

* At 828 PM MDT, a severe thunderstorm was located 4 miles southeast
  of Twin Buttes, or 23 miles west of Julesburg, moving east 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...
  Ovid, Sedgwick and Marks Butte.

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 4075 10276 4100 10275 4100 10237 4075 10235
TIME...MOT...LOC 0228Z 271DEG 17KT 4088 10269

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

$$

63


Action: Continued
Issued At: 2026-08-09 21:38:36

228 
WWUS55 KBOU 100238
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
838 PM MDT Sun Aug 9 2026

COC075-115-100315-
/O.CON.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Logan CO-Sedgwick CO-
838 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
NORTHEASTERN LOGAN AND WESTERN SEDGWICK COUNTIES...

At 838 PM MDT, a severe thunderstorm was located 6 miles southwest of
Sedgwick, or 20 miles west of Julesburg, moving east at 20 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Ovid, Sedgwick and Marks Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds.

&&

LAT...LON 4075 10271 4100 10270 4100 10237 4075 10235
TIME...MOT...LOC 0228Z 271DEG 17KT 4088 10269

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

$$

63


Action: Cancelled
Issued At: 2026-08-09 21:47:36

529 
WWUS55 KBOU 100247
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
847 PM MDT Sun Aug 9 2026

COC075-100257-
/O.CAN.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Logan CO-
847 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN LOGAN
COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1200 AM MDT for a
portion of northeast Colorado.

&&

LAT...LON 4075 10265 4100 10265 4100 10237 4075 10235
TIME...MOT...LOC 0238Z 271DEG 17KT 4088 10263

$$


COC115-100315-
/O.CON.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Sedgwick CO-
847 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
WESTERN SEDGWICK COUNTY...

At 847 PM MDT, a severe thunderstorm was located over Sedgwick, or 15
miles west of Julesburg, moving east at 25 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Ovid, Sedgwick and Marks Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds.

&&

LAT...LON 4075 10265 4100 10265 4100 10237 4075 10235
TIME...MOT...LOC 0238Z 285DEG 22KT 4094 10261

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

$$

63


Action: Continued
Issued At: 2026-08-09 21:47:36

529 
WWUS55 KBOU 100247
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
847 PM MDT Sun Aug 9 2026

COC075-100257-
/O.CAN.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Logan CO-
847 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN LOGAN
COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1200 AM MDT for a
portion of northeast Colorado.

&&

LAT...LON 4075 10265 4100 10265 4100 10237 4075 10235
TIME...MOT...LOC 0238Z 271DEG 17KT 4088 10263

$$


COC115-100315-
/O.CON.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Sedgwick CO-
847 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
WESTERN SEDGWICK COUNTY...

At 847 PM MDT, a severe thunderstorm was located over Sedgwick, or 15
miles west of Julesburg, moving east at 25 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Ovid, Sedgwick and Marks Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds.

&&

LAT...LON 4075 10265 4100 10265 4100 10237 4075 10235
TIME...MOT...LOC 0238Z 285DEG 22KT 4094 10261

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

$$

63


Action: Continued
Issued At: 2026-08-09 22:00:36

842 
WWUS55 KBOU 100300
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
900 PM MDT Sun Aug 9 2026

COC115-100315-
/O.CON.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Sedgwick CO-
900 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR
WESTERN SEDGWICK COUNTY...

At 900 PM MDT, a severe thunderstorm was located 5 miles southwest of
Ovid, or 11 miles southwest of Julesburg, moving east at 25 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...
  Ovid, Sedgwick and Marks Butte.

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 4075 10259 4100 10259 4100 10237 4075 10235
TIME...MOT...LOC 0247Z 289DEG 21KT 4091 10253

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

$$

63


Action: Expired
Issued At: 2026-08-09 22:14:37

302 
WWUS55 KBOU 100314
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
914 PM MDT Sun Aug 9 2026

COC115-100324-
/O.EXP.KBOU.SV.W.0293.000000T0000Z-260810T0315Z/
Sedgwick CO-
914 PM MDT Sun Aug 9 2026

...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 915 PM MDT FOR WESTERN
SEDGWICK COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1200 AM MDT for a
portion of northeast Colorado.

&&

LAT...LON 4075 10259 4100 10259 4100 10237 4075 10235
TIME...MOT...LOC 0300Z 289DEG 21KT 4089 10243

$$

63



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