Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 26, 2021, 6:21 PM MDT for Laramie County, Wyoming. It was in force for 39 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 26, 2021, 6:21 PM MDT (00:21 UTC)
- Expired
- Aug 26, 2021, 7:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Cheyenne, WY
- Hail
- 0.25 in
- Wind
- 40
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 6 km from the middle of the area, began a volume at 00:22 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 00:00Z, 0.4 hours before the alert went out and 200 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
- 191 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 2585 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
928
WWUS85 KCYS 270021
SPSCYS
Special Weather Statement
National Weather Service Cheyenne WY
621 PM MDT Thu Aug 26 2021
WYZ116>119-270100-
South Laramie Range WY-Central Laramie County WY-
South Laramie Range Foothills WY-East Laramie County WY-
621 PM MDT Thu Aug 26 2021
...A strong thunderstorm will impact portions of southwestern Laramie
County through 700 PM MDT...
At 621 PM MDT, Doppler radar was tracking a strong thunderstorm over
North Cheyenne, or near Cheyenne, moving east at 30 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Cheyenne, South Greeley, Hillsdale, Ranchettes, Warren AFB, Frontier
Park, Whitaker, North Cheyenne, Warren Af Base, Fox Farm-College and
South Greeley High.
This includes the following highways...
Interstate 25 in Wyoming between mile markers 1 and 30.
Interstate 80 in Wyoming between mile markers 342 and 382.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4100 10509 4109 10520 4130 10507 4148 10479
4132 10432 4100 10454
TIME...MOT...LOC 0021Z 284DEG 28KT 4124 10483
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
MokryThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 6:05 PM MDT | Special Weather Statement | CYS | Laramie | 25 min |
| Aug 26, 9:11 PM MDT | Special Weather Statement | CYS | Box Butte | 34 min |
| Aug 26, 9:42 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 48 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.