Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 337, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 15, 2019, 11:32 PM MDT for Goshen County, Platte County, Wyoming. It was in force for 43 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
- Aug 15, 2019, 11:32 PM MDT (05:32 UTC)
- Expired
- Aug 16, 2019, 12:15 AM MDT
- In force
- 43 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Goshen County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 107 km from the middle of the area, began a volume at 05:33 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 15, 10:45 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 5.5 hours before the alert went out and 261 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
- 2 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 1848 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
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 Aug 15, 10:09 PM MDT, 1 hour 23 minutes earlier.
Area forecast discussion, Aug 15, 10:09 PM MDT, 1 hour 23 minutes before
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</html>Hazardous weather outlook, Aug 15, 10:43 AM MDT, 12 hours 49 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 1043 AM MDT Thu Aug 15 2019 NEZ002-003-019-021-095-096-WYZ101-102-107-108-161000- Dawes-Box Butte-Scotts Bluff-Morrill-North Sioux-South Sioux- Converse County Lower Elevations-Niobrara County- East Platte County-Goshen County- 1043 AM MDT Thu Aug 15 2019 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated thunderstorms will be possible this afternoon with a few strong storms possible. A somewhat greater threat for scattered strong to severe storms is expected later tonight with large hail the main threat. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Widely scattered showers and storms are expected mainly on Friday, with a few of the storms possibly becoming severe, mainly over the Nebraska Panhandle. .Spotter information statement... Spotter activation is not expected at this time. NEZ020-054-055-WYZ103>106-109>119-161000- Banner-Kimball-Cheyenne-North Laramie Range- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Laramie Range and Southwest Platte 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- 1043 AM MDT Thu Aug 15 2019 This hazardous weather outlook is for portions of western Nebraska...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated showers and thunderstorms are possible into this evening but the severe threat is low. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Local storm report, Aug 15, 5:36 PM MDT, 5 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
536 PM MDT THU AUG 15 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0532 PM HAIL 10 NE SIDNEY 41.24N 102.83W
08/15/2019 M1.00 INCH CHEYENNE NE TRAINED SPOTTER
GROUND PARTIALLY COVERED WITH HAIL
&&
WILLSSpecial weather statement, Aug 15, 8:36 PM MDT, 2 hours 56 minutes before
Special Weather Statement National Weather Service Cheyenne WY 836 PM MDT Thu Aug 15 2019 WYZ101-160300- Converse County Lower Elevations WY- 836 PM MDT Thu Aug 15 2019 ...SPECIAL WEATHER STATEMENT... At 836 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles east of Teapot Rock, or 29 miles northeast of Casper, moving east at 45 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. This storm will remain over mainly rural areas of northwestern Converse County. LAT...LON 4325 10555 4299 10566 4310 10607 4331 10607 TIME...MOT...LOC 0236Z 282DEG 43KT 4322 10608 Brothers
Local storm report, Aug 15, 10:41 PM MDT, 51 minutes before
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</html>Special weather statement, Aug 15, 10:49 PM MDT, 43 minutes before
Special Weather Statement National Weather Service Cheyenne WY 1049 PM MDT Thu Aug 15 2019 WYZ101-103-107-160515- East Platte County WY-Converse County Lower Elevations WY- North Laramie Range WY- 1049 PM MDT Thu Aug 15 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ALBANY... NORTHWESTERN PLATTE AND SOUTHEASTERN CONVERSE COUNTIES UNTIL 1115 PM MDT... At 1049 PM MDT, Doppler radar was tracking a strong thunderstorm near Laprele Reservoir, or 11 miles southwest of Douglas, moving southeast at 40 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Esterbrook Campground and Laprele Reservoir. This includes Interstate 25 in Wyoming between mile markers 122 and 127. A Severe Thunderstorm Watch remains in effect until 500 AM MDT for southeastern and east central Wyoming. LAT...LON 4260 10571 4277 10560 4264 10510 4240 10530 TIME...MOT...LOC 0449Z 295DEG 33KT 4266 10557 Brothers
Local storm report, Aug 15, 11:18 PM MDT, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1118 PM MDT THU AUG 15 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1113 PM HAIL 4 SSW RAWHIDE BUTTES 42.52N 104.53W
08/15/2019 M1.25 INCH GOSHEN WY TRAINED SPOTTER
BROKEN WINDOW
&&
WILLSLocal storm report, Aug 15, 11:24 PM MDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1124 PM MDT THU AUG 15 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1123 PM HAIL 4 S LUSK 42.70N 104.45W
08/15/2019 M1.00 INCH NIOBRARA WY TRAINED SPOTTER
TORRENTIAL RAINFALL OBSERVED IN ADDITION TO QUARTER HAIL
SIZE.
&&
WILLSThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 8:36 PM MDT | Special Weather Statement | CYS | Converse | 24 min |
| Aug 15, 8:50 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 40 min |
| Aug 15, 9:21 PM MDT | Red Flag Warning | CYS | 23 hr | |
| Aug 15, 9:29 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 76 min |
| Aug 15, 10:03 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 42 min |
| Aug 15, 10:24 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 51 min |
| Aug 15, 10:44 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 31 min |
| Aug 15, 10:49 PM MDT | Special Weather Statement | CYS | Converse | 26 min |
| Aug 15, 10:59 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Platte | 46 min |
| Aug 15, 11:12 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 48 min |
| Aug 15, 11:45 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 30 min |
| Aug 15, 11:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 72 min |
| Aug 16, 12:13 AM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 62 min |
| Aug 16, 3:08 AM MDT | Fire Weather Watch | CYS | 24 hr | |
| Aug 16, 3:08 AM MDT | Fire Weather Watch | CYS | 24 hr | |
| Aug 16, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 32 min |
| Aug 16, 4:34 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 26 min |
| Aug 16, 4:38 PM MDT | Special Weather Statement | CYS | Laramie | 52 min |
| Aug 16, 4:57 PM MDT | Special Weather Statement | CYS | Niobrara | 48 min |
| Aug 16, 4:57 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 33 min |
| Aug 16, 5:23 PM MDT | Special Weather Statement | CYS | Laramie | 52 min |
| Aug 16, 5:24 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 17 min |
| Aug 16, 12:40 AM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 80 min |
| Aug 16, 12:42 AM MDT | Special Weather Statement | CYS | Sioux | 48 min |
| Aug 16, 12:56 AM MDT | Severe Thunderstorm Warning | CYS | Banner, Scotts Bluff, Sioux | 79 min |
| Aug 16, 1:48 AM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 72 min |
| Aug 16, 3:49 AM MDT | Special Weather Statement | CYS | Morrill | 41 min |
| Aug 16, 2:56 PM MDT | Special Weather Statement | CYS | Banner | 49 min |
| Aug 16, 3:44 PM MDT | Special Weather Statement | CYS | Kimball | 46 min |
| Aug 16, 5:38 PM MDT | Special Weather Statement | CYS | Kimball | 52 min |
| Aug 16, 5:40 PM MDT | Special Weather Statement | CYS | Banner | 50 min |
| Aug 16, 5:49 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 26 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.