Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 375, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 21, 2019, 4:49 PM MDT for Albany County, Carbon County, Wyoming. It was in force for 26 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 21, 2019, 4:49 PM MDT (22:49 UTC)
- Expired
- Aug 21, 2019, 5:15 PM MDT
- In force
- 26 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 22:52 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 21, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.8 hours before the alert went out and 329 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
- 406 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 35 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 Aug 21, 2:49 PM MDT, 2 hours earlier.
Area forecast discussion, Aug 21, 2:49 PM MDT, 2 hours before
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</html>Hazardous weather outlook, Aug 21, 3:06 PM MDT, 1 hour 43 minutes before
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Special weather statement, Aug 21, 3:28 PM MDT, 1 hour 21 minutes before
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</html>Special weather statement, Aug 21, 4:05 PM MDT, 44 minutes before
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</html>Special weather statement, Aug 21, 4:15 PM MDT, 34 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 |
|---|---|---|---|---|
| Aug 20, 6:02 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 7 min |
| Aug 20, 6:04 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 25 min |
| Aug 20, 6:12 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 33 min |
| Aug 20, 6:20 PM MDT | Flash Flood Warning | CYS | Platte | 13 hr |
| Aug 20, 6:27 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 33 min |
| Aug 20, 6:43 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 17 min |
| Aug 20, 6:57 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 48 min |
| Aug 20, 7:14 PM MDT | Special Weather Statement | CYS | Converse | 61 min |
| Aug 20, 7:25 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse | 18 min |
| Aug 20, 8:04 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse | 26 min |
| Aug 20, 8:41 PM MDT | Flash Flood Warning | CYS | Platte | 11 hr |
| Aug 20, 9:25 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 50 min |
| Aug 20, 9:42 PM MDT | Special Weather Statement | CYS | Platte | 63 min |
| Aug 20, 9:49 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 41 min |
| Aug 20, 10:07 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 53 min |
| Aug 20, 10:50 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 55 min |
| Aug 20, 11:37 PM MDT | Areal Flood Advisory | CYS | Laramie | 3 hr |
| Aug 21, 12:02 AM MDT | Special Weather Statement | CYS | Laramie | 43 min |
| Aug 21, 3:31 AM MDT | Fire Weather Watch | CYS | 10 hr | |
| Aug 21, 7:45 AM MDT | Areal Flood Warning | CYS | Platte | 3 hr |
| Aug 21, 7:59 AM MDT | Areal Flood Advisory | CYS | Laramie | 8 hr |
| Aug 21, 1:54 PM MDT | Fire Weather Watch | CYS | 47 hr | |
| Aug 21, 1:54 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Aug 21, 3:28 PM MDT | Special Weather Statement | CYS | 32 min | |
| Aug 21, 4:05 PM MDT | Special Weather Statement | CYS | 25 min | |
| Aug 21, 4:15 PM MDT | Special Weather Statement | CYS | Albany | 30 min |
| Aug 21, 4:20 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon, Converse | 55 min |
| Aug 21, 4:36 PM MDT | Areal Flood Advisory | CYS | Albany, Carbon | 3 hr |
| Aug 21, 5:14 PM MDT | Special Weather Statement | CYS | Albany | 31 min |
| Aug 21, 5:32 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 43 min |
| Aug 21, 5:35 PM MDT | Areal Flood Advisory | CYS | Albany, Carbon | 3 hr |
| Aug 20, 11:18 PM MDT | Areal Flood Advisory | CYS | Scotts Bluff | 5 hr |
| Aug 20, 11:39 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Box Butte, Cheyenne, Kimball, Morrill | 66 min |
| Aug 21, 12:32 AM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Cheyenne, Morrill | 28 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.