Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 6, 2021, 2:33 PM MDT for Laramie County, Wyoming. It was in force for 42 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, 2021, 2:33 PM MDT (20:33 UTC)
- Expired
- Aug 6, 2021, 3:15 PM MDT
- In force
- 42 min
- Issued by
- NWS Cheyenne, WY
- Hail
- 0.50 in
- Wind
- 55
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 19 km from the middle of the area, began a volume at 20:36 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, 8.6 hours before the alert went out and 211 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
- 3319 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
373
WWUS85 KCYS 062033
SPSCYS
Special Weather Statement
National Weather Service Cheyenne WY
233 PM MDT Fri Aug 6 2021
WYZ116>118-062115-
South Laramie Range WY-Central Laramie County WY-
South Laramie Range Foothills WY-
233 PM MDT Fri Aug 6 2021
...A strong thunderstorm will impact portions of southwestern Laramie
County through 315 PM MDT...
At 232 PM MDT, Doppler radar was tracking a strong thunderstorm over
Crystal Lake Campground, or 19 miles west of Cheyenne, moving
northeast at 35 mph.
HAZARD...Wind gusts of 50 to 55 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This strong thunderstorm will be near...
Federal around 245 PM MDT.
North Cheyenne around 305 PM MDT.
Whitaker around 315 PM MDT.
This includes the following highways...
Interstate 25 in Wyoming between mile markers 12 and 33.
Interstate 80 in Wyoming between mile markers 338 and 350.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4105 10519 4111 10527 4149 10492 4123 10459
TIME...MOT...LOC 2032Z 231DEG 31KT 4113 10516
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH
$$
RubinThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 1:40 PM MDT | Special Weather Statement | CYS | Laramie | 50 min |
| Aug 6, 2:13 PM MDT | Special Weather Statement | CYS | Converse | 47 min |
| Aug 6, 3:12 PM MDT | Special Weather Statement | CYS | Converse | 48 min |
| Aug 6, 3:18 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 42 min |
| Aug 6, 3:29 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Goshen, Niobrara, Platte | 61 min |
| Aug 6, 4:08 PM MDT | Special Weather Statement | CYS | Niobrara | 52 min |
| Aug 6, 3:09 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 51 min |
| Aug 6, 3:31 PM MDT | Special Weather Statement | CYS | Banner | 44 min |
| Aug 6, 3:53 PM MDT | Special Weather Statement | CYS | Banner, Cheyenne, Morrill, Scotts Bluff | 52 min |
| Aug 6, 5:15 PM MDT | Special Weather Statement | CYS | Dawes | 45 min |
| Aug 6, 5:57 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 18 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.