Alert archive / Nebraska / Special Weather Statements in 2020
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 8, 2020, 6:12 PM MDT for Scotts Bluff County, Nebraska. It was in force for 33 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 8, 2020, 6:12 PM MDT (00:12 UTC)
- Expired
- Aug 8, 2020, 6:45 PM MDT
- In force
- 33 min
- Issued by
- NWS Cheyenne, WY
County Scotts Bluff County, NE
The radar
The Cheyenne radar (KCYS), 148 km from the middle of the area, began a volume at 00:12 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
Rapid City, SD (KUNR), launched 00:00Z, 0.2 hours before the alert went out and 235 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
- 1865 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1835 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.6
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 8, 5:57 PM MDT, 15 minutes earlier.
Area forecast discussion, Aug 8, 5:57 PM MDT, 15 minutes before
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</html>Hazardous weather outlook, Aug 8, 3:43 PM MDT, 2 hours 29 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 343 PM MDT Sat Aug 8 2020 WYZ104-105-109>115-092145- 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- 343 PM MDT Sat Aug 8 2020 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Gusty winds and low afternoon humidity will lead to increased fire danger across parts of Carbon County. A Red Flag Warning remains in effect until 8 PM this evening. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Critical fire weather conditions can be expected on a daily basis through next week. A Red Flag Warning is in effect from 9 AM through 8 PM Sunday. .Spotter information statement... Spotter activation will not be required. NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 092145- 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- 343 PM MDT Sat Aug 8 2020 This hazardous weather outlook is for the western Nebraska Panhandle...east central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Isolated to scattered thunderstorms will develop east of the Laramie Range this afternoon and move east into the Nebraska Panhandle through early evening. Some of these storms could become severe with large hail and damaging downburst winds. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Isolated to widely scattered thunderstorms will be possible each day east of the Laramie Range Monday through Wednesday. .Spotter information statement... Spotter activation may be required across the eastern Wyoming plains and western Nebraska Panhandle between 4 PM and 8 PM this evening.
In the hours before
Local storm report, Aug 8, 5:14 PM MDT, 58 minutes before
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</html>Local storm report, Aug 8, 5:57 PM MDT, 15 minutes before
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</html>Local storm report, Aug 8, 6:11 PM MDT, 1 minute before
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</html>Local storm report, Aug 8, 6:12 PM MDT, 0 minutes before
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</html>Special weather statement, Aug 8, 6:12 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 9, 1:33 AM MDT | Fire Weather Watch | CYS | 13 hr | |
| Aug 9, 2:32 PM MDT | Red Flag Warning | CYS | 29 hr | |
| Aug 8, 6:02 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 28 min |
| Aug 8, 6:27 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 18 min |
| Aug 8, 6:29 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 19 min |
Nearby
Special Weather Statements in Nebraska, 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.