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Severe Thunderstorm Warning 0126
Issued by the Cheyenne Forecast Office

Action Issued Starts Expiration
New 2026-06-22 19:21:47 2026-06-22 19:21:00 2026-06-22 20:15:00
Continued 2026-06-22 19:32:47 2026-06-22 20:15:00
Cancelled 2026-06-22 19:32:47 2026-06-22 20:15:00
Continued 2026-06-22 19:52:48 2026-06-22 20:15:00
Expired 2026-06-22 20:05:48 2026-06-22 20:15:00


Action: New
Issued At: 2026-06-22 19:21:47

342 
WUUS55 KCYS 230021
SVRCYS
NEC013-045-165-WYC015-027-230115-
/O.NEW.KCYS.SV.W.0126.260623T0021Z-260623T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
621 PM MDT Mon Jun 22 2026

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northwestern Box Butte County in the Panhandle of Nebraska...
  Southwestern Dawes County in the Panhandle of Nebraska...
  Central Sioux County in the Panhandle of Nebraska...
  Southeastern Niobrara County in east central Wyoming...
  Northeastern Goshen County in southeastern Wyoming...

* Until 715 PM MDT.

* At 621 PM MDT, a severe thunderstorm was located near Van Tassell,
  or 23 miles east of Lusk, moving southeast at 45 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...
  Harrison, Van Tassell, Agate Fossil Beds National Monument, Soldier
  Creek Campground, Flahertys Corner, Fort Robinson State Park, Box
  Butte Reservoir, Marsland, and Belmont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter such as an interior room, a
bathroom, closet or basement.

&&

LAT...LON 4273 10429 4286 10404 4255 10302 4208 10365
TIME...MOT...LOC 0021Z 309DEG 41KT 4269 10400 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Natoli


Action: Continued
Issued At: 2026-06-22 19:32:47

727 
WWUS55 KCYS 230032
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
632 PM MDT Mon Jun 22 2026

WYC015-027-230042-
/O.CAN.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Niobrara WY-Goshen WY-
632 PM MDT Mon Jun 22 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NIOBRARA AND
NORTHEASTERN GOSHEN COUNTIES IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
the Panhandle of Nebraska.

&&

LAT...LON 4266 10405 4280 10387 4255 10302 4212 10359
TIME...MOT...LOC 0032Z 308DEG 36KT 4263 10390 

$$

NEC013-045-165-230115-
/O.CON.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Box Butte NE-Dawes NE-Sioux NE-
632 PM MDT Mon Jun 22 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR NORTHWESTERN BOX BUTTE...SOUTHWESTERN DAWES AND CENTRAL SIOUX
COUNTIES...

At 632 PM MDT, a severe thunderstorm was located near Harrison, or 29
miles east of Lusk, moving southeast at 40 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...
Harrison, Agate Fossil Beds National Monument, Soldier Creek
Campground, Flahertys Corner, Fort Robinson State Park, Box Butte
Reservoir, Marsland, and Belmont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4266 10405 4280 10387 4255 10302 4212 10359
TIME...MOT...LOC 0032Z 308DEG 36KT 4263 10390 

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

$$

Natoli


Action: Cancelled
Issued At: 2026-06-22 19:32:47

727 
WWUS55 KCYS 230032
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
632 PM MDT Mon Jun 22 2026

WYC015-027-230042-
/O.CAN.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Niobrara WY-Goshen WY-
632 PM MDT Mon Jun 22 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NIOBRARA AND
NORTHEASTERN GOSHEN COUNTIES IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
the Panhandle of Nebraska.

&&

LAT...LON 4266 10405 4280 10387 4255 10302 4212 10359
TIME...MOT...LOC 0032Z 308DEG 36KT 4263 10390 

$$

NEC013-045-165-230115-
/O.CON.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Box Butte NE-Dawes NE-Sioux NE-
632 PM MDT Mon Jun 22 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR NORTHWESTERN BOX BUTTE...SOUTHWESTERN DAWES AND CENTRAL SIOUX
COUNTIES...

At 632 PM MDT, a severe thunderstorm was located near Harrison, or 29
miles east of Lusk, moving southeast at 40 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...
Harrison, Agate Fossil Beds National Monument, Soldier Creek
Campground, Flahertys Corner, Fort Robinson State Park, Box Butte
Reservoir, Marsland, and Belmont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4266 10405 4280 10387 4255 10302 4212 10359
TIME...MOT...LOC 0032Z 308DEG 36KT 4263 10390 

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

$$

Natoli


Action: Continued
Issued At: 2026-06-22 19:52:48

283 
WWUS55 KCYS 230052
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
652 PM MDT Mon Jun 22 2026

NEC013-045-165-230115-
/O.CON.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Box Butte NE-Dawes NE-Sioux NE-
652 PM MDT Mon Jun 22 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR NORTHWESTERN BOX BUTTE...SOUTHWESTERN DAWES AND EAST CENTRAL
SIOUX COUNTIES...

At 652 PM MDT, a severe thunderstorm was located 9 miles south of
Fort Robinson State Park, or 34 miles southwest of Chadron, moving
southeast at 65 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...
Fort Robinson State Park, Box Butte Reservoir, Belmont, and Marsland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4255 10377 4268 10361 4255 10302 4228 10338
TIME...MOT...LOC 0052Z 293DEG 57KT 4253 10354 

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

$$

Natoli


Action: Expired
Issued At: 2026-06-22 20:05:48

667 
WWUS55 KCYS 230105
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
705 PM MDT Mon Jun 22 2026

NEC013-045-165-230115-
/O.EXP.KCYS.SV.W.0126.000000T0000Z-260623T0115Z/
Box Butte NE-Dawes NE-Sioux NE-
705 PM MDT Mon Jun 22 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BOX BUTTE...
SOUTHWESTERN DAWES AND EAST CENTRAL SIOUX COUNTIES WILL EXPIRE AT 715
PM 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.  However, small
hail and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
the Panhandle of Nebraska.

&&

LAT...LON 4255 10377 4268 10361 4255 10302 4228 10338
TIME...MOT...LOC 0105Z 309DEG 41KT 4244 10340 

$$

Natoli



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