Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 237, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 15, 2019, 4:15 PM MDT for Converse County, Wyoming. It was in force for 30 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
- Jul 15, 2019, 4:15 PM MDT (22:15 UTC)
- Expired
- Jul 15, 2019, 4:45 PM MDT
- In force
- 30 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Converse County, WY
The radar
The Cheyenne radar (KCYS), 210 km from the middle of the area, began a volume at 22:18 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 |
|---|---|---|---|
| Jul 15, 2:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 10.3 hours before the alert went out and 244 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
- 411 J/kg
- Mixed-layer CIN
- -354 J/kg
- Mixed-layer LCL
- 1339 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 Jul 15, 1:07 PM MDT, 3 hours 8 minutes earlier.
Area forecast discussion, Jul 15, 1:07 PM MDT, 3 hours 8 minutes before
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</html>Hazardous weather outlook, Jul 15, 12:51 PM MDT, 3 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 1251 PM MDT Mon Jul 15 2019 NEZ002-003-019>021-054-055-095-096-WYZ101>119-161900- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-Converse County Lower Elevations- Niobrara County-North Laramie Range- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Central Carbon County- North Snowy Range Foothills-Southwest Carbon 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- 1251 PM MDT Mon Jul 15 2019 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT There is a marginal risk of severe thunderstorms this afternoon and evening east of a Laramie to Cheyenne line, with a slight risk of severe thunderstorms east of a Douglas to Kimball line. Isolated to scattered thunderstorms will develop this afternoon and evening. Some of the thunderstorms, especially in the slight risk area, will likely become strong to severe, producing either large hail or damaging winds. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A few thunderstorms may become strong to severe Tuesday afternoon and evening north of a Lusk to Alliance line. Thunderstorms will be possible again Wednesday, Saturday and Sunday afternoons and evenings. .Spotter information statement... Spotter activation will not be needed. Rubin
In the hours before
Special weather statement, Jul 15, 1:29 PM MDT, 2 hours 46 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 8:02 PM MDT | Special Weather Statement | CYS | Goshen | 43 min |
| Jul 15, 1:29 PM MDT | Special Weather Statement | CYS | Laramie | 46 min |
| Jul 15, 3:26 PM MDT | Special Weather Statement | CYS | Converse | 49 min |
| Jul 15, 4:20 PM MDT | Special Weather Statement | CYS | Platte | 25 min |
| Jul 15, 4:42 PM MDT | Special Weather Statement | CYS | Converse | 48 min |
| Jul 15, 4:47 PM MDT | Special Weather Statement | CYS | Platte | 28 min |
| Jul 15, 4:49 PM MDT | Special Weather Statement | CYS | Niobrara | 26 min |
| Jul 15, 5:07 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 23 min |
| Jul 15, 5:16 PM MDT | Special Weather Statement | CYS | Goshen | 29 min |
| Jul 15, 5:30 PM MDT | Special Weather Statement | CYS | Niobrara | 30 min |
| Jul 15, 5:35 PM MDT | Special Weather Statement | CYS | Goshen | 40 min |
| Jul 15, 5:57 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 33 min |
| Jul 14, 7:42 PM MDT | Special Weather Statement | CYS | Sioux | 48 min |
| Jul 14, 8:25 PM MDT | Special Weather Statement | CYS | Sioux | 50 min |
| Jul 14, 8:30 PM MDT | Special Weather Statement | CYS | Sioux | 45 min |
| Jul 14, 8:37 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 23 min |
| Jul 14, 8:58 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 47 min |
| Jul 14, 9:33 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 42 min |
| Jul 15, 5:55 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 35 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.