Alert archive / Nebraska / Special Weather Statements in 2017
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 24, 2017, 6:36 PM MDT for Cheyenne County, Nebraska. It was in force for 24 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 24, 2017, 6:36 PM MDT (00:36 UTC)
- Expired
- Aug 24, 2017, 7:00 PM MDT
- In force
- 24 min
- Issued by
- NWS Cheyenne, WY
County Cheyenne County, NE
The radar
The Cheyenne radar (KCYS), 166 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 139 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
- 3 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 2791 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 159 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 24, 3:07 PM MDT, 3 hours 29 minutes earlier.
Area forecast discussion, Aug 24, 3:07 PM MDT, 3 hours 29 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>Hazardous weather outlook, Aug 24, 6:59 AM MDT, 11 hours 37 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 659 AM MDT Thu Aug 24 2017 WYZ101>119-251300- Converse County Lower Elevations-Niobrara County- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-Central Carbon County- North Snowy Range Foothills-Southwest Carbon 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- 659 AM MDT Thu Aug 24 2017 This hazardous weather outlook is for portions of east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated to widely scattered thunderstorms are expected today across southeast Wyoming. Severe weather is not expected at this time. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be required at this time. NEZ002-003-019>021-054-055-095-096-251300- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux- 659 AM MDT Thu Aug 24 2017 This hazardous weather outlook is for portions of western Nebraska. .DAY ONE...TODAY AND TONIGHT Widely scattered thunderstorms are expected across western Nebraska today. A few thunderstorms may become strong with hail and strong gusty winds possible. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be required at this time.
In the hours before
Special weather statement, Aug 24, 5:36 PM MDT, 1 hour before
Special Weather Statement National Weather Service Cheyenne WY 536 PM MDT THU AUG 24 2017 WYZ102-250000- Niobrara County WY- 536 PM MDT THU AUG 24 2017 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL NIOBRARA COUNTY UNTIL 600 PM MDT... At 534 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles northeast of Lusk. This storm was nearly stationary. Half inch hail and winds in excess of 40 mph will be possible with this storm. This storm has been stationary over the past hour and has produced an estimated 1.5 to 2 inches of rain just east of Highway 85 in the vicinity of Hat Creek. This storm will remain over mainly rural areas of southeastern Niobrara County. 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. && LAT...LON 4295 10442 4298 10424 4281 10410 4280 10434 TIME...MOT...LOC 2334Z 339DEG 2KT 4288 10431 Hahn
Special weather statement, Aug 24, 6:18 PM MDT, 18 minutes before
Special Weather Statement National Weather Service Cheyenne WY 618 PM MDT THU AUG 24 2017 NEZ002-250045- Dawes NE- 618 PM MDT THU AUG 24 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DAWES COUNTY UNTIL 645 PM MDT... At 616 PM MDT, Doppler radar was tracking a strong thunderstorm located just north of Highway 20 between Crawford and Whitney, or 18 miles west of Chadron, moving northwest at 5 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Mainly rural areas northeast of Crawford and southwest of Whitney. LAT...LON 4274 10322 4270 10337 4286 10349 4292 10329 TIME...MOT...LOC 0016Z 156DEG 11KT 4275 10334 Hahn
Special weather statement, Aug 24, 6:36 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Cheyenne WY 636 PM MDT THU AUG 24 2017 NEZ055-250100- Cheyenne NE- 636 PM MDT THU AUG 24 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHEYENNE COUNTY UNTIL 700 PM MDT... At 635 PM MDT, Doppler radar was tracking a strong thunderstorm near Colton, or 7 miles southeast of Sidney, moving east at 5 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of southeastern Cheyenne County. This includes Interstate 80 in Nebraska between mile markers 61 and 74. LAT...LON 4114 10293 4113 10267 4100 10266 4100 10294 TIME...MOT...LOC 0035Z 257DEG 6KT 4108 10285 Hahn
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 6:18 PM MDT | Special Weather Statement | CYS | Dawes | 27 min |
| Aug 24, 6:59 PM MDT | Special Weather Statement | CYS | Cheyenne | 31 min |
| Aug 24, 7:29 PM MDT | Special Weather Statement | CYS | Cheyenne | 31 min |
| Aug 24, 7:32 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 28 min |
Nearby
Special Weather Statements in Nebraska, 2017Every special weather statement in 2017
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.