Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 107, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 15, 2021, 6:22 PM MDT for Goshen County, Laramie County, Wyoming; Banner County, Nebraska. It was in force for 23 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
- Jul 15, 2021, 6:22 PM MDT (00:22 UTC)
- Expired
- Jul 15, 2021, 6:45 PM MDT
- In force
- 23 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Banner County, NE, Goshen County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 72 km from the middle of the area, began a volume at 00:24 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 nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.4 hours before the alert went out and 194 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.
- Mixed-layer CAPE
- 97 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 2986 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
847
WUUS55 KCYS 160022
SVRCYS
NEC007-WYC015-021-160045-
/O.NEW.KCYS.SV.W.0107.210716T0022Z-210716T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
622 PM MDT Thu Jul 15 2021
The National Weather Service in Cheyenne has issued a
* Severe Thunderstorm Warning for...
Western Banner County in the Panhandle of Nebraska...
Southeastern Goshen County in southeastern Wyoming...
East central Laramie County in southeastern Wyoming...
* Until 645 PM MDT.
* At 622 PM MDT, a severe thunderstorm was located near Albin, or 31
miles northwest of Kimball, moving east at 15 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...
Albin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4140 10413 4145 10423 4152 10424 4159 10419
4165 10389 4153 10383 4140 10391
TIME...MOT...LOC 0022Z 263DEG 12KT 4150 10414
HAIL...1.00IN
WIND...60MPH
$$
Mokry1 follow-up statement
891
WWUS55 KCYS 160042
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
642 PM MDT Thu Jul 15 2021
NEC007-WYC015-021-160047-
/O.EXP.KCYS.SV.W.0107.000000T0000Z-210716T0045Z/
Banner NE-Goshen WY-Laramie WY-
642 PM MDT Thu Jul 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BANNER...SOUTHEASTERN
GOSHEN AND EAST CENTRAL LARAMIE COUNTIES WILL EXPIRE AT 645 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4140 10413 4145 10423 4152 10424 4159 10419
4165 10389 4153 10383 4140 10391
TIME...MOT...LOC 0037Z 263DEG 12KT 4151 10408
$$
MokryThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 7:03 PM MDT | Special Weather Statement | CYS | Laramie | 27 min |
| Jul 15, 8:07 PM MDT | Special Weather Statement | CYS | Albany | 38 min |
| Jul 15, 8:42 PM MDT | Special Weather Statement | CYS | Albany | 33 min |
| Jul 15, 9:13 PM MDT | Special Weather Statement | CYS | Albany | 32 min |
| Jul 15, 6:09 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 36 min |
| Jul 15, 6:13 PM MDT | Special Weather Statement | CYS | Banner | 32 min |
| Jul 15, 6:50 PM MDT | Special Weather Statement | CYS | Banner | 40 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2021Severe Thunderstorm Warnings in Nebraska, 2021Every 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.