Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Cheyenne, WY

June 13, 2021Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 2021, 4:53 PM MDT for Goshen County, Wyoming. It was in force for 32 min. 1 report 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: Jun 13, 2021, 4:53 PM MDT (22:53 UTC)
Expired: Jun 13, 2021, 5:25 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 104 km from the middle of the area, began a volume at 22:56 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
Jun 13, 4:57 PM MDT	HAIL 1.75	7 Sw Lingle, WY

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
Jun 13, 3:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.9 hours before the alert went out and 257 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: 10 J/kg
Mixed-layer CIN: -354 J/kg
Mixed-layer LCL: 2455 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

493 
WUUS55 KCYS 132253
SVRCYS
WYC015-132345-
/O.NEW.KCYS.SV.W.0048.210613T2253Z-210613T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
453 PM MDT Sun Jun 13 2021

The National Weather Service in Cheyenne has issued a

* Severe Thunderstorm Warning for...
  Central Goshen County in southeastern Wyoming...

* Until 545 PM MDT.

* At 453 PM MDT, a severe thunderstorm was located near Veteran, or
  13 miles west of Torrington, moving northeast at 10 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...
  Torrington, Lingle and Veteran. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

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

&&

LAT...LON 4194 10444 4202 10453 4223 10437 4202 10409
TIME...MOT...LOC 2253Z 232DEG 8KT 4203 10443 

HAIL...1.75IN
WIND...60MPH
 
$$

Hammer

2 follow-up statements

247 
WWUS55 KCYS 132315
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
515 PM MDT Sun Jun 13 2021

WYC015-132345-
/O.CON.KCYS.SV.W.0048.000000T0000Z-210613T2345Z/
Goshen WY-
515 PM MDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT
FOR EAST CENTRAL GOSHEN COUNTY...

At 515 PM MDT, a severe thunderstorm was located over Torrington,
moving east at 20 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Torrington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

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

&&

LAT...LON 4198 10431 4207 10433 4214 10425 4202 10409
TIME...MOT...LOC 2315Z 248DEG 18KT 4206 10423 

HAIL...1.00IN
WIND...<50MPH
 
$$

Hammer

736 
WWUS55 KCYS 132325
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
525 PM MDT Sun Jun 13 2021

WYC015-132335-
/O.CAN.KCYS.SV.W.0048.000000T0000Z-210613T2345Z/
Goshen WY-
525 PM MDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GOSHEN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
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 4198 10431 4207 10433 4214 10425 4202 10409
TIME...MOT...LOC 2323Z 232DEG 8KT 4207 10421 

$$

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 1:49 PM MDT	Special Weather Statement	CYS	Laramie	41 min
Jun 13, 2:44 PM MDT	Special Weather Statement	CYS	Albany	31 min
Jun 13, 3:12 PM MDT	Special Weather Statement	CYS	Albany	33 min
Jun 13, 3:31 PM MDT	Special Weather Statement	CYS	Platte	29 min
Jun 13, 3:57 PM MDT	Special Weather Statement	CYS	Goshen	33 min
Jun 13, 4:31 PM MDT	Special Weather Statement	CYS	Goshen	29 min
Jun 13, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	47 min
Jun 13, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	47 min
Jun 13, 5:16 PM MDT	Special Weather Statement	CYS	Laramie	44 min
Jun 13, 5:43 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	41 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 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.