Alert archive / Wyoming / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 310, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 26, 2026, 6:39 PM MDT for Goshen County, Laramie County, Wyoming. It was in force for 19 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
- Aug 26, 2026, 6:39 PM MDT (00:39 UTC)
- Expired
- Aug 26, 2026, 6:58 PM MDT
- In force
- 19 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Goshen County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 39 km from the middle of the area, began a volume at 00:39 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 |
|---|---|---|---|
| Aug 26, 3:53 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 0.7 hours before the alert went out and 324 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
- 482 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 2334 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
663
WUUS55 KCYS 270039
SVRCYS
WYC015-021-270130-
/O.NEW.KCYS.SV.W.0310.260827T0039Z-260827T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cheyenne WY
639 PM MDT Wed Aug 26 2026
The National Weather Service in Cheyenne has issued a
* Severe Thunderstorm Warning for...
Southwestern Goshen County in southeastern Wyoming...
Northwestern Laramie County in southeastern Wyoming...
* Until 730 PM MDT.
* At 638 PM MDT, a severe thunderstorm was located near Whitaker, or
21 miles north of Cheyenne, moving northeast at 25 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...
Whitaker.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4145 10503 4165 10465 4164 10464 4157 10465
4156 10461 4137 10450 4134 10497
TIME...MOT...LOC 0038Z 246DEG 22KT 4145 10492
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Brauer2 follow-up statements
873
WWUS55 KCYS 270048
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
648 PM MDT Wed Aug 26 2026
WYC015-021-270130-
/O.CON.KCYS.SV.W.0310.000000T0000Z-260827T0130Z/
Goshen WY-Laramie WY-
648 PM MDT Wed Aug 26 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR SOUTHWESTERN GOSHEN AND NORTH CENTRAL LARAMIE COUNTIES...
At 647 PM MDT, a severe thunderstorm was located near Whitaker, or 22
miles north of Cheyenne, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Whitaker.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4147 10493 4165 10465 4164 10464 4157 10465
4156 10461 4137 10450 4136 10489
TIME...MOT...LOC 0047Z 246DEG 22KT 4147 10485
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Brauer805
WWUS55 KCYS 270058
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
658 PM MDT Wed Aug 26 2026
WYC015-021-270108-
/O.CAN.KCYS.SV.W.0310.000000T0000Z-260827T0130Z/
Goshen WY-Laramie WY-
658 PM MDT Wed Aug 26 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GOSHEN AND NORTH
CENTRAL 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,
gusty winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
southeastern Wyoming.
&&
LAT...LON 4147 10493 4165 10465 4164 10464 4157 10465
4156 10461 4137 10450 4136 10489
TIME...MOT...LOC 0056Z 246DEG 22KT 4150 10476
$$
BrauerThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 6:08 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 40 min |
| Aug 26, 6:15 PM MDT | Special Weather Statement | CYS | Laramie | 30 min |
| Aug 26, 6:16 PM MDT | Special Weather Statement | CYS | Niobrara | 29 min |
| Aug 26, 6:31 PM MDT | Special Weather Statement | CYS | Niobrara | 29 min |
| Aug 26, 6:40 PM MDT | Special Weather Statement | CYS | Platte | 35 min |
| Aug 26, 7:00 PM MDT | Special Weather Statement | CYS | Converse | 30 min |
| Aug 26, 7:34 PM MDT | Special Weather Statement | CYS | Converse | 26 min |
| Aug 27, 4:25 PM MDT | Special Weather Statement | CYS | Laramie | 35 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2026Every severe thunderstorm warning in 2026
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.