Alert archive / Wyoming / Snow Squall Warnings in 2021
Snow Squall Warning 15, NWS Cheyenne, WY
NWS Cheyenne, WY issued this snow squall warning at Dec 15, 2021, 7:38 AM MST for Albany County, Carbon County, Wyoming. It was in force for 52 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
- Dec 15, 2021, 7:38 AM MST (14:38 UTC)
- Expired
- Dec 15, 2021, 8:30 AM MST
- In force
- 52 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 134 km from the middle of the area, began a volume at 14:40 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
Riverton, WY (KRIW), launched 12:00Z, 2.6 hours before the alert went out and 237 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
- 1486 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 256 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
927
WWUS55 KCYS 151438
SQWCYS
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Cheyenne WY
738 AM MST Wed Dec 15 2021
WYC001-007-151530-
/O.NEW.KCYS.SQ.W.0015.211215T1438Z-211215T1530Z/
Carbon WY-Albany WY-
738 AM MST Wed Dec 15 2021
The National Weather Service in Cheyenne has issued a
* Snow Squall Warning for...
East central Carbon County in south central Wyoming...
Central Albany County in southeastern Wyoming...
* Until 830 AM MST.
* At 736 AM MST, a dangerous snow squall was located near Elk
Mountain, or 42 miles east of Rawlins, moving northeast at 15 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 50 mph.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
*
This includes Interstate 80 in Wyoming between mile markers 248 and
287.
Locations impacted include...
Hanna, Elk Mountain and Arlington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
If traveling on a highway, find the nearest exit or rest area and
park safely away from traffic. Allow snow squalls to pass before
attempting to resume travel.
&&
LAT...LON 4141 10605 4153 10618 4171 10659 4183 10665
4191 10654 4151 10595
TIME...MOT...LOC 1436Z 212DEG 14KT 4179 10641
$$
Brothers2 follow-up statements
520
WWUS55 KCYS 151507
SQWCYS
Snow Squall Warning
National Weather Service Cheyenne WY
807 AM MST Wed Dec 15 2021
WYC001-007-151530-
/O.CON.KCYS.SQ.W.0015.000000T0000Z-211215T1530Z/
Carbon WY-Albany WY-
807 AM MST Wed Dec 15 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 830 AM MST FOR EAST
CENTRAL CARBON AND CENTRAL ALBANY COUNTIES...
At 804 AM MST, a dangerous snow squall was located over Elk
Mountain, or 43 miles east of Rawlins, moving northeast at 10 mph.
WYDOT webcams have shown whiteout conditions near Arlington and Elk
Mountain along Interstate 80 for the past 30 minutes with
measured wind gusts 50 to 65 MPH.
HAZARD...Extremely poor visibility heavy snow and blowing snow. Wind
gusts greater than 50 mph.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
This includes Interstate 80 in Wyoming between mile markers 248 and
287.
Locations impacted include...
Hanna, Elk Mountain and Arlington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
If traveling on a highway, find the nearest exit or rest area and
park safely away from traffic. Allow snow squalls to pass before
attempting to resume travel.
&&
LAT...LON 4141 10605 4153 10618 4171 10659 4183 10665
4191 10654 4151 10595
TIME...MOT...LOC 1504Z 222DEG 10KT 4170 10640
$$
Brothers275
WWUS55 KCYS 151528
SQWCYS
Snow Squall Warning
National Weather Service Cheyenne WY
828 AM MST Wed Dec 15 2021
WYC001-007-151537-
/O.EXP.KCYS.SQ.W.0015.000000T0000Z-211215T1530Z/
Carbon WY-Albany WY-
828 AM MST Wed Dec 15 2021
...THE SNOW SQUALL WARNING FOR EAST CENTRAL CARBON AND CENTRAL ALBANY
COUNTIES WILL EXPIRE AT 830 AM MST...
The snow squall which prompted the warning has exited the area.
Therefore, the snow squall warning will be allowed to expire. Areas
of blowing snow will continue to make travel difficult along with 50
to 65 MPH winds.
LAT...LON 4141 10605 4153 10618 4171 10659 4183 10665
4191 10654 4151 10595
TIME...MOT...LOC 1527Z 212DEG 14KT 4176 10635
$$
BrothersNearby
Snow Squall Warnings in Wyoming, 2021Every snow squall warning 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.