Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 392, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 3, 2019, 7:45 PM MDT for Laramie County, Platte County, Wyoming. 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 counties it named.
The facts
- Issued
- Sep 3, 2019, 7:45 PM MDT (01:45 UTC)
- Expired
- Sep 3, 2019, 8:08 PM MDT
- In force
- 23 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 63 km from the middle of the area, began a volume at 01:48 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, 1.8 hours before the alert went out and 246 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
- 933 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 1815 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 3, 2:25 PM MDT, 5 hours 20 minutes earlier.
Area forecast discussion, Sep 3, 2:25 PM MDT, 5 hours 20 minutes before
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</html>Hazardous weather outlook, Sep 3, 3:19 AM MDT, 16 hours 26 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 319 AM MDT Tue Sep 3 2019 NEZ002-003-019>021-054-055-095-096-WYZ101>103-105>108-112>119- 040930- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-Converse County Lower Elevations- Niobrara County-North Laramie Range-Shirley Basin- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- South Laramie Range-South Laramie Range Foothills- Central Laramie County-East Laramie County- 319 AM MDT Tue Sep 3 2019 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated afternoon and evening thunderstorms will be possible, mainly from Douglas to Laramie to Cheyenne. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Isolated to scattered afternoon and evening thunderstorms will be possible each day. .Spotter information statement... Spotter activation will not be needed. WYZ104-109>111-040930- Ferris/Seminoe/Shirley Mountains-Central Carbon County- North Snowy Range Foothills-Southwest Carbon County- 319 AM MDT Tue Sep 3 2019 This hazardous weather outlook is for portions of south central Wyoming. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A Fire Weather Watch is in effect from noon to 7 PM on Wednesday for gusty winds and low humidity. Isolated to scattered afternoon and evening thunderstorms will be possible each day. .Spotter information statement... Spotter activation will not be needed. Rubin
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 6:26 PM MDT | Special Weather Statement | CYS | Albany | 49 min |
| Sep 3, 6:42 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 33 min |
| Sep 3, 7:13 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 32 min |
| Sep 3, 7:53 PM MDT | Special Weather Statement | CYS | Albany | 52 min |
| Sep 3, 8:41 PM MDT | Special Weather Statement | CYS | Albany | 49 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2019Every severe thunderstorm warning in 2019
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.