Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 29, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 5, 2021, 7:16 PM MDT for Goshen County, Niobrara County, Platte County, Wyoming. It was in force for 28 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
- Jun 5, 2021, 7:16 PM MDT (01:16 UTC)
- Expired
- Jun 5, 2021, 7:44 PM MDT
- In force
- 28 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Goshen County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 138 km from the middle of the area, began a volume at 01:17 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
Rapid City, SD (KUNR), launched 00:00Z, 1.3 hours before the alert went out and 238 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
- 1645 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 2622 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
510 WUUS55 KCYS 060116 SVRCYS WYC015-027-031-060200- /O.NEW.KCYS.SV.W.0029.210606T0116Z-210606T0200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Cheyenne WY 716 PM MDT Sat Jun 5 2021 The National Weather Service in Cheyenne has issued a * Severe Thunderstorm Warning for... South central Niobrara County in east central Wyoming... Northern Goshen County in southeastern Wyoming... Northeastern Platte County in southeastern Wyoming... * Until 800 PM MDT. * At 716 PM MDT, a severe thunderstorm was located 7 miles southeast of Two Moon Campground, or 27 miles north of Wheatland, moving northeast at 35 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Guernsey, Jay Em, Guernsey Campground, Rawhide Buttes, Glendo Reservoir, Two Moon Campground and Hartville. 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. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4226 10491 4245 10501 4267 10461 4233 10410 TIME...MOT...LOC 0116Z 240DEG 29KT 4243 10482 HAIL...0.88IN WIND...60MPH $$ Claycomb
2 follow-up statements
627 WWUS55 KCYS 060129 SVSCYS Severe Weather Statement National Weather Service Cheyenne WY 729 PM MDT Sat Jun 5 2021 WYC015-027-031-060200- /O.CON.KCYS.SV.W.0029.000000T0000Z-210606T0200Z/ Niobrara WY-Goshen WY-Platte WY- 729 PM MDT Sat Jun 5 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT FOR SOUTH CENTRAL NIOBRARA...NORTHERN GOSHEN AND NORTHEASTERN PLATTE COUNTIES... At 728 PM MDT, a severe thunderstorm was located 8 miles southwest of Rawhide Buttes, or 20 miles southwest of Lusk, moving northeast at 35 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Guernsey, Guernsey Campground, Rawhide Buttes, Jay Em and Hartville. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Cheyenne. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4226 10485 4245 10495 4265 10461 4233 10410 TIME...MOT...LOC 0128Z 247DEG 38KT 4248 10461 HAIL...0.88IN WIND...60MPH $$ Claycomb
740
WWUS55 KCYS 060144
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
744 PM MDT Sat Jun 5 2021
WYC015-027-031-060154-
/O.CAN.KCYS.SV.W.0029.000000T0000Z-210606T0200Z/
Niobrara WY-Goshen WY-Platte WY-
744 PM MDT Sat Jun 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL NIOBRARA...
NORTHERN GOSHEN AND NORTHEASTERN PLATTE COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled. However heavy rain is still possible with this
thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Cheyenne.
LAT...LON 4226 10485 4245 10495 4265 10461 4233 10410
TIME...MOT...LOC 0141Z 240DEG 29KT 4255 10446
$$
ClaycombThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 7:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 22 min |
| Jun 6, 3:24 PM MDT | Special Weather Statement | CYS | Laramie | 36 min |
| Jun 6, 5:21 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jun 6, 5:32 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 43 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 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.