Alert archive / Nebraska / Special Weather Statements in 2020
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 6, 2020, 5:30 PM MDT for Sioux County, Nebraska. It was in force for 45 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, 5:30 PM MDT (23:30 UTC)
- Expired
- Aug 6, 2020, 6:15 PM MDT
- In force
- 45 min
- Issued by
- NWS Cheyenne, WY
County Sioux County, NE
The radar
The Cheyenne radar (KCYS), 177 km from the middle of the area, began a volume at 23:34 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, 11.5 hours before the alert went out and 311 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, 5:26 PM MDT, 4 minutes earlier.
Area forecast discussion, Aug 6, 5:26 PM MDT, 4 minutes before
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</html>Hazardous weather outlook, Aug 6, 4:09 AM MDT, 13 hours 21 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, 4:19 PM MDT, 1 hour 11 minutes before
Special Weather Statement National Weather Service Cheyenne WY 419 PM MDT Thu Aug 6 2020 WYZ107-108-062300- East Platte County WY-Goshen County WY- 419 PM MDT Thu Aug 6 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GOSHEN AND EAST CENTRAL PLATTE COUNTIES UNTIL 500 PM MDT... At 418 PM MDT, Doppler radar was tracking a strong thunderstorm near Fort Laramie National Historic Site, or 19 miles east of Wheatland, moving northeast at 25 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. This strong thunderstorm will be near... Fort Laramie National Historic Site around 430 PM MDT. Fort Laramie around 435 PM MDT. Lingle around 445 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 4199 10456 4211 10473 4241 10447 4217 10419 TIME...MOT...LOC 2218Z 228DEG 22KT 4213 10460 Trudel
Special weather statement, Aug 6, 4:33 PM MDT, 57 minutes before
Special Weather Statement National Weather Service Cheyenne WY 433 PM MDT Thu Aug 6 2020 NEZ002-095-096-062315- Dawes NE-North Sioux NE-South Sioux NE- 433 PM MDT Thu Aug 6 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DAWES AND CENTRAL SIOUX COUNTIES UNTIL 515 PM MDT... At 432 PM MDT, Doppler radar was tracking a strong thunderstorm 10 miles southwest of Harrison, or 28 miles southeast of Lusk, moving east at 30 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Agate Bed National Monument. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 4246 10404 4265 10405 4266 10341 4231 10349 TIME...MOT...LOC 2232Z 284DEG 24KT 4255 10397 Trudel
Local storm report, Aug 6, 4:41 PM MDT, 49 minutes before
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</html>Local storm report, Aug 6, 4:55 PM MDT, 35 minutes before
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</html>Special weather statement, Aug 6, 5:14 PM MDT, 16 minutes before
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</html>Special weather statement, Aug 6, 5:30 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, 2:42 PM MDT | Special Weather Statement | CYS | Niobrara | 48 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, 5:46 PM MDT | Special Weather Statement | CYS | Cheyenne | 44 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.