Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 398, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 10, 2019, 1:59 PM MDT for 4 counties in Wyoming. It was in force for 31 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 10, 2019, 1:59 PM MDT (19:59 UTC)
- Expired
- Sep 10, 2019, 2:30 PM MDT
- In force
- 31 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Converse County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 157 km from the middle of the area, began a volume at 20:00 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 |
|---|---|---|---|
| Sep 10, 1:53 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.0 hours before the alert went out and 230 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1302 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 10, 1:00 PM MDT, 59 minutes earlier.
Area forecast discussion, Sep 10, 1:00 PM MDT, 59 minutes before
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</html>Hazardous weather outlook, Sep 10, 4:55 AM MDT, 9 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 455 AM MDT Tue Sep 10 2019 NEZ020-054-055-WYZ103>106-109>119-111100- 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- 455 AM MDT Tue Sep 10 2019 This hazardous weather outlook is for portions of western Nebraska...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Widely scattered afternoon and evening thunderstorms are forecast across most of southeast Wyoming Tuesday and Wednesday. Severe weather appears unlikely at this time, but some storms may contain small hail and gusty winds. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Scattered to numerous thunderstorms are expected on Wednesday. Some accumulating snow is possible in the higher mountains above 10,000 feet late Wednesday night and Thursday morning. .Spotter information statement... Spotter activation is unlikely today. NEZ002-003-019-021-095-096-WYZ101-102-107-108-111100- Dawes-Box Butte-Scotts Bluff-Morrill-North Sioux-South Sioux- Converse County Lower Elevations-Niobrara County- East Platte County-Goshen County- 455 AM MDT Tue Sep 10 2019 This hazardous weather outlook is for most of the western Nebraska panhandle north of Interstate 80 and east central Wyoming. .DAY ONE...TODAY AND TONIGHT There is a risk for scattered severe thunderstorms today across eastern Wyoming and most of western Nebraska. Thunderstorms will develop along Interstate 25 during the afternoon and track northeast. These thunderstorms may contain large hail, very heavy rainfall, and damaging winds. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Scattered to numerous thunderstorms are forecast for Wednesday. A few of these thunderstorms may become strong and contain small hail, frequent lightning, and gusty winds. .Spotter information statement... Spotters are urged to report severe weather to the National Weather Service.
In the hours before
Special weather statement, Sep 10, 10:18 AM MDT, 3 hours 41 minutes before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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Please try again in a few minutes.
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</html>Special weather statement, Sep 10, 11:42 AM MDT, 2 hours 17 minutes before
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<div class="status" id="status">Temporary Notice</div>
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</html>Special weather statement, Sep 10, 1:17 PM MDT, 42 minutes before
Special Weather Statement National Weather Service Cheyenne WY 117 PM MDT Tue Sep 10 2019 WYZ101>103-107-102000- East Platte County WY-Converse County Lower Elevations WY- North Laramie Range WY-Niobrara County WY- 117 PM MDT Tue Sep 10 2019 ...SPECIAL WEATHER STATEMENT... At 117 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles north of Esterbrook Campground, or 16 miles south of Douglas, moving northeast at 25 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Glendo, Keeline and Lost Springs. This includes Interstate 25 in Wyoming between mile markers 113 and 132. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 4240 10526 4250 10546 4294 10511 4273 10456 TIME...MOT...LOC 1917Z 213DEG 22KT 4253 10530 Worley
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 3:07 AM MDT | Special Weather Statement | CYS | Laramie | 38 min |
| Sep 10, 3:44 AM MDT | Special Weather Statement | CYS | Laramie | 46 min |
| Sep 10, 4:26 AM MDT | Special Weather Statement | CYS | Goshen | 49 min |
| Sep 10, 5:06 AM MDT | Severe Thunderstorm Warning | CYS | Goshen | 39 min |
| Sep 10, 11:42 AM MDT | Special Weather Statement | CYS | Converse | 48 min |
| Sep 10, 12:16 PM MDT | Freeze Watch | CYS | Albany, Carbon | 27 hr |
| Sep 10, 1:17 PM MDT | Special Weather Statement | CYS | Converse | 43 min |
| Sep 10, 2:09 PM MDT | Special Weather Statement | CYS | Niobrara | 51 min |
| Sep 10, 2:35 PM MDT | Special Weather Statement | CYS | Niobrara | 40 min |
| Sep 10, 2:54 PM MDT | Special Weather Statement | CYS | Goshen | 51 min |
| Sep 10, 3:01 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 29 min |
| Sep 10, 3:08 PM MDT | Tornado Warning | CYS | Goshen, Platte | 37 min |
| Sep 10, 3:37 PM MDT | Tornado Warning | CYS | Goshen | 23 min |
| Sep 10, 4:00 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 45 min |
| Sep 10, 4:11 PM MDT | Areal Flood Advisory | CYS | Goshen, Platte | 3 hr |
| Sep 10, 4:17 PM MDT | Tornado Warning | CYS | Goshen | 28 min |
| Sep 10, 4:36 PM MDT | Tornado Warning | CYS | Goshen | 39 min |
| Sep 10, 4:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 42 min |
| Sep 10, 4:58 PM MDT | Tornado Warning | CYS | Goshen, Platte | 32 min |
| Sep 10, 5:15 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 16 min |
| Sep 10, 5:24 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 66 min |
| Sep 10, 5:35 PM MDT | Flash Flood Warning | CYS | Goshen | 100 min |
| Sep 10, 5:41 PM MDT | Tornado Warning | CYS | Goshen | 19 min |
| Sep 10, 5:59 PM MDT | Tornado Warning | CYS | Goshen | 31 min |
| Sep 10, 4:01 AM MDT | Special Weather Statement | CYS | Scotts Bluff | 44 min |
| Sep 10, 10:18 AM MDT | Special Weather Statement | CYS | Sioux | 57 min |
| Sep 10, 5:59 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Scotts Bluff, Sioux | 46 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.