Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Cheyenne, WY

May 26, 2021Laramie County, Wyoming; Banner County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 26, 2021, 5:30 PM MDT for Laramie County, Wyoming; Banner County, Nebraska. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 26, 2021, 5:30 PM MDT (23:30 UTC)
Expired: May 26, 2021, 6:04 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Banner County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 66 km from the middle of the area, began a volume at 23:33 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.

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

Denver, CO (KDNR), launched 12:00Z, 11.5 hours before the alert went out and 193 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: 138 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1456 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

220 
WUUS55 KCYS 262330
SVRCYS
NEC007-WYC021-270015-
/O.NEW.KCYS.SV.W.0021.210526T2330Z-210527T0015Z/

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

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Southwestern Banner County in the Panhandle of Nebraska...
  East central Laramie County in southeastern Wyoming...

* Until 615 PM MDT.

* At 530 PM MDT, a severe thunderstorm was located near Albin, or 31
  miles northwest of Kimball, moving east 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.

* This severe thunderstorm will be near...
  Albin around 545 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4141 10424 4152 10423 4157 10398 4141 10397
TIME...MOT...LOC 2330Z 270DEG 14KT 4147 10418 

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

Jamski

2 follow-up statements

165 
WWUS55 KCYS 262349
SVSCYS

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

NEC007-WYC021-270015-
/O.CON.KCYS.SV.W.0021.000000T0000Z-210527T0015Z/
Banner NE-Laramie WY-
549 PM MDT Wed May 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR SOUTHWESTERN BANNER AND NORTHEASTERN LARAMIE COUNTIES...

At 549 PM MDT, a severe thunderstorm was located near Albin, or 26
miles northwest of Kimball, moving east at 15 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southwestern Banner and northeastern Laramie Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Cheyenne.

Frequent cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4142 10415 4150 10415 4157 10398 4141 10397
TIME...MOT...LOC 2349Z 278DEG 12KT 4146 10407 

HAIL...1.25IN
WIND...60MPH
 
$$

Jamski

669 
WWUS55 KCYS 270004
SVSCYS

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

NEC007-WYC021-270013-
/O.CAN.KCYS.SV.W.0021.000000T0000Z-210527T0015Z/
Banner NE-Laramie WY-
604 PM MDT Wed May 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BANNER AND
NORTHEASTERN LARAMIE COUNTIES IS CANCELLED...
                
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 cancelled.  However small hail and
heavy rain are still possible with this thunderstorm.

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

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Cheyenne.

LAT...LON 4142 10415 4150 10415 4157 10398 4141 10397
TIME...MOT...LOC 0002Z 270DEG 14KT 4146 10399 

$$

Jamski

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 3:28 PM MDT	Special Weather Statement	CYS	Goshen	47 min
May 26, 3:51 PM MDT	Special Weather Statement	CYS	Goshen	24 min
May 26, 4:07 PM MDT	Special Weather Statement	CYS	Goshen	23 min
May 26, 4:14 PM MDT	Special Weather Statement	CYS	Niobrara	46 min
May 26, 4:30 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	25 min
May 26, 5:02 PM MDT	Special Weather Statement	CYS	Niobrara	28 min
May 26, 5:10 PM MDT	Special Weather Statement	CYS	Laramie	35 min
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, 4:39 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes	51 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, 5:32 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 Wyoming, 2021 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.