Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Cheyenne, WY

May 26, 2021Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 26, 2021, 4:39 PM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 51 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 26, 2021, 4:39 PM MDT (22:39 UTC)
Expired: May 26, 2021, 5:30 PM MDT
In force: 51 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Box Butte County, NE, Dawes County, NE

The radar

The Rapid City radar (KUDX), 179 km from the middle of the area, began a volume at 22:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 26, 4:58 PM MDT	HAIL 1	2 S Chadron State Park, NE
May 26, 5:28 PM MDT	HAIL 2	10 West Hemingford, NE	PHOTO ON SOCIAL MEDIA READING 2.14 INCHES FOR DIAMETER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 26, 1:27 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.7 hours before the alert went out and 173 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 366 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

325 
WUUS55 KCYS 262239
SVRCYS
NEC013-045-262330-
/O.NEW.KCYS.SV.W.0019.210526T2239Z-210526T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
439 PM MDT Wed May 26 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Northern Box Butte County in the Panhandle of Nebraska...
  Southern Dawes County in the Panhandle of Nebraska...

* Until 530 PM MDT.

* At 439 PM MDT, severe thunderstorms were located along a line
  extending from 7 miles east of Chadron to 9 miles north of
  Flahertys Corner, moving southeast at 15 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...
  Hemingford, Chadron Campground, Box Butte Campground, Red Cloud
  Campground, Box Butte Dam, Marsland and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 10285 4229 10327 4252 10347 4289 10280
      4279 10279 4278 10277 4245 10277 4244 10275
      4241 10275
TIME...MOT...LOC 2239Z 348DEG 13KT 4280 10285 4246 10342 

HAIL...1.50IN
WIND...60MPH
 
$$

Trudel

3 follow-up statements

173 
WWUS55 KCYS 262302
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
502 PM MDT Wed May 26 2021

NEC013-045-262330-
/O.CON.KCYS.SV.W.0019.000000T0000Z-210526T2330Z/
Box Butte NE-Dawes NE-
502 PM MDT Wed May 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR NORTHERN BOX BUTTE AND SOUTHERN DAWES COUNTIES...

At 502 PM MDT, severe thunderstorms were located along a line
extending from 7 miles northwest of Hay Springs to near Flahertys
Corner, moving south at 15 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...
Hemingford, Chadron Campground, Box Butte Campground, Red Cloud
Campground, Box Butte Dam, Marsland and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 10285 4229 10327 4252 10347 4289 10280
      4279 10279 4278 10277 4245 10277 4244 10275
      4241 10275
TIME...MOT...LOC 2302Z 348DEG 13KT 4273 10283 4239 10340 

HAIL...1.50IN
WIND...60MPH
 
$$

Trudel

275 
WWUS55 KCYS 262315
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
515 PM MDT Wed May 26 2021

NEC013-045-262330-
/O.CON.KCYS.SV.W.0019.000000T0000Z-210526T2330Z/
Box Butte NE-Dawes NE-
515 PM MDT Wed May 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR NORTHERN BOX BUTTE AND SOUTHERN DAWES COUNTIES...

At 514 PM MDT, severe thunderstorms were located along a line
extending from 6 miles west of Hay Springs to near Flahertys Corner,
moving south at 15 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated. At 500 PM, a storm spotter reported 
         quarter sized hail 12 miles of Chadron. 

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...
Hemingford, Chadron Campground, Box Butte Campground, Red Cloud
Campground, Box Butte Dam, Marsland and Chadron St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4230 10285 4229 10327 4252 10347 4289 10280
      4279 10279 4278 10277 4245 10277 4244 10275
      4241 10275
TIME...MOT...LOC 2314Z 348DEG 13KT 4269 10282 4235 10339 

HAIL...1.50IN
WIND...60MPH
 
$$

Trudel

816 
WWUS55 KCYS 262324
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
524 PM MDT Wed May 26 2021

NEC013-045-262333-
/O.EXP.KCYS.SV.W.0019.000000T0000Z-210526T2330Z/
Box Butte NE-Dawes NE-
524 PM MDT Wed May 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BOX BUTTE AND
SOUTHERN DAWES COUNTIES WILL EXPIRE AT 530 PM MDT...
    
The storms which prompted the warning will move out of the area in 
the next 10 minutes. Therefore, the warning will be allowed to 
expire.  However gusty winds are still possible with these 
thunderstorms.

A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4230 10285 4229 10327 4252 10347 4289 10280
      4279 10279 4278 10277 4245 10277 4244 10275
      4241 10275
TIME...MOT...LOC 2323Z 348DEG 13KT 4259 10279 4225 10336 

$$

Trudel

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 2:25 PM MDT	Special Weather Statement	CYS	Dawes	50 min
May 26, 2:50 PM MDT	Special Weather Statement	CYS	Sioux	40 min
May 26, 3:08 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	37 min
May 26, 3:17 PM MDT	Special Weather Statement	CYS	Dawes	43 min
May 26, 3:20 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	40 min
May 26, 3:45 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	45 min
May 26, 4:15 PM MDT	Special Weather Statement	CYS	Sioux	45 min
May 26, 4:29 PM MDT	Special Weather Statement	CYS	Dawes	46 min
May 26, 4:36 PM MDT	Special Weather Statement	CYS	Cheyenne, Kimball	39 min
May 26, 4:47 PM MDT	Tornado Warning	CYS	Sioux	28 min
May 26, 5:18 PM MDT	Special Weather Statement	CYS	Morrill	42 min
May 26, 5:27 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	33 min
May 26, 5:30 PM MDT	Severe Thunderstorm Warning	CYS	Banner	34 min
May 26, 5:32 PM MDT	Special Weather Statement	CYS	Box Butte	43 min
May 26, 5:41 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Sioux	34 min
May 26, 5:42 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	30 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.