Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jun 5, 2021, 5:41 PM MDT for Albany County, Wyoming. It was in force for 49 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
- Jun 5, 2021, 5:41 PM MDT (23:41 UTC)
- Expired
- Jun 5, 2021, 6:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Cheyenne, WY
County Albany County, WY
The radar
The Cheyenne radar (KCYS), 155 km from the middle of the area, began a volume at 23:40 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, 11.7 hours before the alert went out and 349 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3372 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 51 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 Jun 5, 5:23 PM MDT, 18 minutes earlier.
Area forecast discussion, Jun 5, 5:23 PM MDT, 18 minutes before
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</html>Hazardous weather outlook, Jun 5, 4:13 AM MDT, 13 hours 28 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 413 AM MDT Sat Jun 5 2021 WYZ101>119-061015- 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- 413 AM MDT Sat Jun 5 2021 This hazardous weather outlook is for south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Widely scattered thunderstorms are forecast to develop this afternoon and linger through the early evening hours. Severe thunderstorms are not expected. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Isolated thunderstorms are possible Monday and Tuesday afternoon. Overall, the probability of severe thunderstorms is low with a few strong thunderstorms possible along and east of Interstate 25. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-061015- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- 413 AM MDT Sat Jun 5 2021 This hazardous weather outlook is for portions of panhandle Nebraska. .DAY ONE...TODAY AND TONIGHT Isolated thunderstorms are possible late this afternoon and into the evening hours, mainly across the northern Nebraska Panhandle. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Isolated thunderstorms are forecast to develop Monday and Tuesday afternoon. Overall, the probability of severe thunderstorms is low with a few strong thunderstorms possible. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Jun 5, 3:15 PM MDT, 2 hours 26 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
315 PM MDT Sat Jun 5 2021
WYZ117-118-052200-
Central Laramie County WY-South Laramie Range Foothills WY-
315 PM MDT Sat Jun 5 2021
...SPECIAL WEATHER STATEMENT...
At 314 PM MDT, Doppler radar was tracking a strong thunderstorm over
Natural Fort, or 12 miles southwest of Cheyenne, moving east at 35
mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Cheyenne, South Greeley, Fox Farm-College and South Greeley High.
This includes the following highways...
Interstate 25 in Wyoming between mile markers 1 and 8.
Interstate 80 in Wyoming between mile markers 361 and 369.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4106 10510 4116 10463 4103 10449 4100 10460
4100 10505
TIME...MOT...LOC 2114Z 253DEG 30KT 4099 10491
WilkinsonSpecial weather statement, Jun 5, 4:29 PM MDT, 1 hour 12 minutes before
Special Weather Statement National Weather Service Cheyenne WY 429 PM MDT Sat Jun 5 2021 WYZ115-052315- Laramie Valley WY- 429 PM MDT Sat Jun 5 2021 ...SPECIAL WEATHER STATEMENT... At 427 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles northwest of Laramie. This storm is moving east at 5 MPH. Winds in excess of 30 mph and large amounts of rainfall will be possible with this storm. Locations impacted include... Laramie. This includes Interstate 80 in Wyoming between mile markers 295 and 302. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. 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 4133 10590 4150 10582 4142 10556 4125 10566 TIME...MOT...LOC 2227Z 289DEG 4KT 4139 10577 Wilkinson
Local storm report, Jun 5, 5:16 PM MDT, 25 minutes before
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</html>Special weather statement, Jun 5, 5:41 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 |
|---|---|---|---|---|
| Jun 5, 3:15 PM MDT | Special Weather Statement | CYS | Laramie | 45 min |
| Jun 5, 4:29 PM MDT | Special Weather Statement | CYS | Albany | 46 min |
Nearby
Special Weather Statements in Wyoming, 2021Every special weather statement in 2021
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.