Alert archive / Wyoming / Special Weather Statements in 2020
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 6, 2020, 2:42 PM MDT for Niobrara County, Wyoming. It was in force for 48 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 6, 2020, 2:42 PM MDT (20:42 UTC)
- Expired
- Aug 6, 2020, 3:30 PM MDT
- In force
- 48 min
- Issued by
- NWS Cheyenne, WY
County Niobrara County, WY
The radar
The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 20:45 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 (KDNR), launched 12:00Z, 8.7 hours before the alert went out and 319 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
- 116 J/kg
- Mixed-layer CIN
- -360 J/kg
- Mixed-layer LCL
- 2239 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 53 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 6, 11:35 AM MDT, 3 hours 7 minutes earlier.
Area forecast discussion, Aug 6, 11:35 AM MDT, 3 hours 7 minutes before
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</html>Hazardous weather outlook, Aug 6, 4:09 AM MDT, 10 hours 33 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 409 AM MDT Thu Aug 6 2020 WYZ104-105-109>115-071015- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- 409 AM MDT Thu Aug 6 2020 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Dry and breezy conditions expected with fire weather conditions the primary concern. A Red Flag Warning is in place today. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Red Flag Warning is in place Friday, with more warnings likely over the course of the next week. .Spotter information statement... Spotter activation will not be required. NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 071015- Dawes-Box Butte-Scotts Bluff County-Banner County-Morrill- Kimball County-Cheyenne-North Sioux-South Sioux- Converse County Lower Elevations-Niobrara County- North Laramie Range- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-South Laramie Range- South Laramie Range Foothills-Central Laramie County- East Laramie County- 409 AM MDT Thu Aug 6 2020 This hazardous weather outlook is for portions of panhandle Nebraska...western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Scattered afternoon and evening thunderstorms will develop Thursday; some may be strong to severe. Strong winds will be the primary threat, with large hail possible over east-central Wyoming and the western Nebraska Panhandle. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Storms become isolated and confined to the mountains Friday and Saturday. Fire weather concerns beginning Friday for areas along and near the Laramie Range. .Spotter information statement... Spotter activation will not be required.
In the hours before
Special weather statement, Aug 6, 1:28 PM MDT, 1 hour 14 minutes before
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</html>Special weather statement, Aug 6, 2:26 PM MDT, 16 minutes before
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</html>Special weather statement, Aug 6, 2:31 PM MDT, 11 minutes before
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</html>Special weather statement, Aug 6, 2:42 PM 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, 7:09 PM MDT | Special Weather Statement | CYS | Niobrara | 51 min |
| Aug 5, 7:55 PM MDT | Special Weather Statement | CYS | Niobrara | 50 min |
| Aug 5, 8:30 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 45 min |
| Aug 6, 3:08 AM MDT | Red Flag Warning | CYS | 41 hr | |
| Aug 6, 1:28 PM MDT | Special Weather Statement | CYS | Laramie | 47 min |
| Aug 6, 2:31 PM MDT | Special Weather Statement | CYS | Laramie | 44 min |
| Aug 6, 3:30 PM MDT | Special Weather Statement | CYS | Niobrara | 45 min |
| Aug 6, 4:19 PM MDT | Special Weather Statement | CYS | Goshen | 41 min |
| Aug 6, 4:29 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 26 min |
| Aug 6, 5:42 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 33 min |
| Aug 5, 6:11 PM MDT | Special Weather Statement | CYS | Morrill | 49 min |
| Aug 5, 6:13 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 18 min |
| Aug 5, 6:18 PM MDT | Special Weather Statement | CYS | Dawes | 42 min |
| Aug 5, 6:50 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 40 min |
| Aug 5, 7:37 PM MDT | Special Weather Statement | CYS | Cheyenne | 38 min |
| Aug 5, 7:52 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 27 min |
| Aug 5, 7:57 PM MDT | Special Weather Statement | CYS | Sioux | 48 min |
| Aug 5, 9:00 PM MDT | Special Weather Statement | CYS | Dawes | 45 min |
| Aug 5, 9:39 PM MDT | Special Weather Statement | CYS | Dawes | 51 min |
| Aug 5, 10:16 PM MDT | Special Weather Statement | CYS | Box Butte | 59 min |
| Aug 5, 10:19 PM MDT | Special Weather Statement | CYS | Dawes | 56 min |
| Aug 5, 11:15 PM MDT | Special Weather Statement | CYS | Morrill | 45 min |
| Aug 6, 2:26 PM MDT | Special Weather Statement | CYS | Kimball | 49 min |
| Aug 6, 2:35 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 40 min |
| Aug 6, 3:10 PM MDT | Special Weather Statement | CYS | Banner | 50 min |
| Aug 6, 3:16 PM MDT | Special Weather Statement | CYS | Kimball | 44 min |
| Aug 6, 3:36 PM MDT | Special Weather Statement | CYS | Sioux | 39 min |
| Aug 6, 3:51 PM MDT | Special Weather Statement | CYS | Banner | 39 min |
| Aug 6, 4:33 PM MDT | Special Weather Statement | CYS | Sioux | 42 min |
| Aug 6, 5:14 PM MDT | Special Weather Statement | CYS | Cheyenne | 46 min |
| Aug 6, 5:30 PM MDT | Special Weather Statement | CYS | Sioux | 45 min |
| Aug 6, 5:46 PM MDT | Special Weather Statement | CYS | Cheyenne | 44 min |
Nearby
Special Weather Statements in Wyoming, 2020Every special weather statement in 2020
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.