Alert archive / Wyoming / Special Weather Statements in 2018
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 5, 2018, 2:50 AM MDT for Carbon County, Wyoming. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2018, 2:50 AM MDT (08:50 UTC)
- Expired
- Aug 5, 2018, 3:30 AM MDT
- In force
- 40 min
- Issued by
- NWS Cheyenne, WY
County Carbon County, WY
The radar
The Cheyenne radar (KCYS), 197 km from the middle of the area, began a volume at 08:56 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 (KDEN), launched 00:00Z, 8.8 hours before the alert went out and 379 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
- 191 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 3300 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 10:55 PM MDT, 3 hours 55 minutes earlier.
Area forecast discussion, Aug 4, 10:55 PM MDT, 3 hours 55 minutes before
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</html>Hazardous weather outlook, Aug 4, 6:16 AM MDT, 20 hours 34 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 616 AM MDT Sat Aug 4 2018 WYZ104-109>111-051230- Ferris/Seminoe/Shirley Mountains-Central Carbon County- North Snowy Range Foothills-Southwest Carbon County- 616 AM MDT Sat Aug 4 2018 This hazardous weather outlook is for portions of south central Wyoming. .DAY ONE...TODAY AND TONIGHT A Red Flag Warning is in effect this afternoon and early evening for western Carbon county. Warm, dry and breezy conditions will create dangerous fire weather conditions. Any fires that develop could spread quickly. Scattered showers and thunderstorms are expected this afternoon and tonight. Severe weather is not expected. However, a few storms may produce gusty winds. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Scattered showers and thunderstorms will develop again on Sunday across portions of southeast Wyoming. Some storms could be strong, with small hail and gusty winds the primary hazards. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ101>103-105>108-112>119- 051230- 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- 616 AM MDT Sat Aug 4 2018 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Scattered showers and thunderstorms are expected this afternoon and tonight across southeast Wyoming and the western Nebraska Panhandle. Severe weather is not expected. However, a few strong storms are possible with small hail and gusty winds the primary hazards. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Scattered showers and thunderstorms will develop again on Sunday across southeast Wyoming and the western Nebraska Panhandle. Severe weather is not expected. However, a few strong storms are possible with small hail and gusty winds the primary hazards. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Aug 5, 2:50 AM MDT, 0 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 5, 9:29 AM MDT | Special Weather Statement | CYS | Carbon | 46 min |
| Aug 5, 9:59 AM MDT | Special Weather Statement | CYS | Carbon | 46 min |
| Aug 5, 10:45 AM MDT | Special Weather Statement | CYS | Carbon | 45 min |
| Aug 5, 11:16 AM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 44 min |
| Aug 5, 11:52 AM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 38 min |
| Aug 5, 12:24 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 36 min |
| Aug 5, 1:01 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 29 min |
| Aug 5, 1:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 30 min |
| Aug 5, 2:25 PM MDT | Special Weather Statement | CYS | Carbon | 50 min |
| Aug 5, 3:22 PM MDT | Special Weather Statement | CYS | Carbon | 38 min |
| Aug 5, 4:54 PM MDT | Special Weather Statement | CYS | Laramie | 51 min |
| Aug 5, 5:07 PM MDT | Special Weather Statement | CYS | Converse | 53 min |
| Aug 5, 5:11 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 33 min |
| Aug 5, 5:20 PM MDT | Special Weather Statement | CYS | Laramie | 25 min |
| Aug 5, 5:28 PM MDT | Special Weather Statement | CYS | Converse | 32 min |
| Aug 5, 5:40 PM MDT | Special Weather Statement | CYS | Laramie | 35 min |
| Aug 5, 5:43 PM MDT | Special Weather Statement | CYS | Carbon | 47 min |
| Aug 5, 5:59 PM MDT | Special Weather Statement | CYS | Niobrara | 31 min |
| Aug 5, 1:58 PM MDT | Special Weather Statement | CYS | Kimball | 47 min |
| Aug 5, 2:48 PM MDT | Special Weather Statement | CYS | Cheyenne | 42 min |
| Aug 5, 3:19 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 26 min |
Nearby
Special Weather Statements in Wyoming, 2018Every special weather statement in 2018
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.