Alert archive / Wyoming / High Wind Warnings in 2020

High Wind Warning 51, NWS Cheyenne, WY

December 18, 20207 counties in Wyoming

NWS Cheyenne, WY issued this high wind warning at Dec 18, 2020, 1:08 PM MST for 7 counties in Wyoming. It took effect at Dec 18, 2020, 11:00 PM MST. It was in force for 63 hr. 60 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 18, 2020, 1:08 PM MST (20:08 UTC)
In effect from
Dec 18, 2020, 11:00 PM MST
Expired
Dec 21, 2020, 1:31 PM MST
In force
63 hr
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 114 km from the middle of the area, began a volume at 20:12 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.

What was reported inside it

TimeReportWhereRemark
Dec 19, 12:22 AM MSTNON-TSTM WND GST 583 Ese Elk Mountain, WYMESONET STATION WY20 2.5 SE ELK MOUNTAIN (WYDOT).
Dec 19, 12:24 AM MSTNON-TSTM WND GST 621 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 1:06 AM MSTNON-TSTM WND GST 651 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 1:56 AM MSTNON-TSTM WND GST 621 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 3:12 AM MSTNON-TSTM WND GST 621 Sse Bordeaux, WYMESONET STATION KBRX 1.4 S BORDEAUX (WYDOT).
Dec 19, 3:52 AM MSTNON-TSTM WND GST 661 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 4:06 AM MSTNON-TSTM WND GST 583 Ese Elk Mountain, WYMESONET STATION WY20 2.5 SE ELK MOUNTAIN (WYDOT).
Dec 19, 4:06 AM MSTNON-TSTM WND GST 741 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 4:15 AM MSTNON-TSTM WND GST 5811 Wsw Warren Af Base, WYMESONET STATION UP226 10.5 NW NATURAL FORT (UPR).
Dec 19, 4:30 AM MSTNON-TSTM WND GST 6011 Wsw Warren Af Base, WYMESONET STATION UP226 10.5 NW NATURAL FORT (UPR).
Dec 19, 4:42 AM MSTNON-TSTM WND GST 582 E Arlington, WYMESONET STATION WY23 1.6 E ARLINGTON (WYDOT).
Dec 19, 5:08 AM MSTNON-TSTM WND GST 681 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 5:26 AM MSTNON-TSTM WND GST 622 E Arlington, WYMESONET STATION WY23 1.6 E ARLINGTON (WYDOT).
Dec 19, 5:32 AM MSTNON-TSTM WND GST 595 Nw Arlington, WYMESONET STATION WY21 5.5 NW ARLINGTON (WYDOT).
Dec 19, 5:45 AM MSTNON-TSTM WND GST 6111 Wsw Warren Af Base, WYMESONET STATION UP226 10.5 NW NATURAL FORT (UPR).
Dec 19, 6:02 AM MSTNON-TSTM WND GST 761 Nnw Arlington, WYMESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).
Dec 19, 6:22 AM MSTNON-TSTM WND GST 6012 Wsw Warren Af Base, WYMESONET STATION WY38 11.8 S FEDERAL (WYDOT).
Dec 19, 6:25 AM MSTNON-TSTM WND GST 8010 Ese Crystal Lake Cam, WYEMKAY UPR SITE. SUSTAINED WINDS 61 MPH. GUST TO 71 MPH AT 655 AM.
Dec 19, 6:32 AM MSTNON-TSTM WND GST 643 Ese Elk Mountain, WYMESONET STATION WY20 2.5 SE ELK MOUNTAIN (WYDOT).
Dec 19, 6:40 AM MSTNON-TSTM WND GST 619 Sse Crystal Lake Camp, WYLYNCH UPR SITE.
Dec 19, 7:06 AM MSTNON-TSTM WND GST 627 Ese Arlington, WYCOOPER COVE WYDOT SITE. SUSTAINED WINDS 35 MPH.
Dec 19, 7:12 AM MSTNON-TSTM WND GST 671 Nnw Arlington, WYARLINGTON WYDOT SITE. SUSTAINED WINDS 56 MPH.
Dec 19, 7:14 AM MSTNON-TSTM WND GST 593 Nw Arlington, WYFOOTE CREEK WYDOT SITE. SUSTAINED WINDS 47 MPH.
Dec 19, 7:22 AM MSTNON-TSTM WND GST 598 Ese Crystal Lake Camp, WYOTTO WYDOT SITE. SUSTAINED WINDS 45 MPH.
Dec 19, 7:38 AM MSTNON-TSTM WND GST 658 Ese Crystal Lake Camp, WYOTTO WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 7:42 AM MSTNON-TSTM WND GST 592 Ne Granite Springs Re, WYWILDCAT TRAIL WYDOT SITE. SUSTAINED WINDS 39 MPH.
Dec 19, 7:42 AM MSTNON-TSTM WND GST 661 Sse Bordeaux, WYBORDEAUX WYDOT SITE ON INTERSTATE 25. SUSTAINED WINDS 48 MPH.
Dec 19, 7:54 AM MSTNON-TSTM WND GST 6210 Wsw Cheyenne, WYMILE POST 353 WYDOT SITE. SUSTAINED WINDS 49 MPH.
Dec 19, 8:10 AM MSTNON-TSTM WND GST 599 Sse Crystal Lake Camp, WYLYNCH UPR SITE. SUSTAINED WINDS 49 MPH. WIND GUST 65 MPH AT 740 AM.
Dec 19, 8:26 AM MSTNON-TSTM WND GST 581 Sse Bordeaux, WYBORDEAUX WYDOT SITE. SUSTAINED WINDS 42 MPH.
Dec 19, 8:26 AM MSTNON-TSTM WND GST 602 Ne Granite Springs Re, WYWILDCAT TRAIL WYDOT SITE. SUSTAINED WINDS 44 MPH.
Dec 19, 8:32 AM MSTNON-TSTM WND GST 621 Nnw Arlington, WYARLINGTON WYDOT SITE. SUSTAINED WINDS 46 MPH.
Dec 19, 8:36 AM MSTNON-TSTM WND GST 638 Ese Crystal Lake Camp, WYOTTO WYDOT SITE. SUSTAINED WINDS 44 MPH.
Dec 19, 8:45 AM MSTNON-TSTM WND GST 8510 Ese Crystal Lake Cam, WYEMKAY UPR SITE. WIND GUST TO 79 MPH AT 910 AM.
Dec 19, 9:22 AM MSTNON-TSTM WND GST 651 Sse Bordeaux, WYBORDEAUX WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 9:24 AM MSTNON-TSTM WND GST 637 Nw Elk Mountain, WYHALLECK RIDGE WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 9:26 AM MSTNON-TSTM WND GST 5911 Se Arlington, WYSTROUSS HILL WYDOT SITE. SUSTAINED WINDS 38 MPH.
Dec 19, 9:26 AM MSTNON-TSTM WND GST 607 Ese Arlington, WYCOOPER COVE WYDOT SITE. SUSTAINED WINDS 37 MPH.
Dec 19, 9:30 AM MSTNON-TSTM WND GST 6210 Wsw Cheyenne, WYMILE POST 353 WYDOT SITE. SUSTAINED WINDS 49 MPH.
Dec 19, 9:36 AM MSTNON-TSTM WND GST 668 Ese Crystal Lake Camp, WYOTTO WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 10:10 AM MSTNON-TSTM WND GST 583 Wsw Winchester Hills, WYWARREN MESONET SITE. SUSTAINED WINDS 42 MPH.
Dec 19, 10:30 AM MSTHIGH SUST WINDS 4612 Ene North Fork Campg, WYQUEALY DOME WYDOT SITE. SUSTAINED WINDS OVER 40 MPH FOR PAST HOUR. PEAK WIND GUST 57 MPH.
Dec 19, 10:32 AM MSTNON-TSTM WND GST 651 Nnw Arlington, WYARLINGTON WYDOT SITE. SUSTAINED WINDS 48 MPH.
Dec 19, 10:32 AM MSTNON-TSTM WND GST 671 Sse Bordeaux, WYBORDEAUX WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 10:46 AM MSTNON-TSTM WND GST 59Cheyenne, WY
Dec 19, 10:53 AM MSTNON-TSTM WND GST 59Cheyenne, WYSUSTAINED 41 MPH.
Dec 19, 11:00 AM MSTNON-TSTM WND GST 7610 Ese Crystal Lake Cam, WYEMKAY UPR SITE. SUSTAINED WINDS 63 MPH.
Dec 19, 11:28 AM MSTNON-TSTM WND GST 641 Nnw Arlington, WYARLINGTON WYDOT SITE. SUSTAINED WINDS 49 MPH.
Dec 19, 11:32 AM MSTNON-TSTM WND GST 681 Sse Bordeaux, WYBORDEAUX WYDOT SITE. SUSTAINED WINDS 50 MPH.
Dec 19, 11:36 AM MSTNON-TSTM WND GST 643 Nw Elk Mountain, WYELK MOUNTAIN WYDOT SITE. SUSTAINED WINDS 39 MPH.
Dec 19, 11:36 AM MSTNON-TSTM WND GST 707 Ese Arlington, WYCOOPER COVE WYDOT SITE. SUSTAINED WINDS 44 MPH.
Dec 19, 11:50 AM MSTNON-TSTM WND GST 624 W Muddy Gap, WYSUSTAINED WINDS 30 MPH.
Dec 19, 11:54 AM MSTNON-TSTM WND GST 61Cheyenne, WYSUSTAINED WINDS 40 MPH.
Dec 19, 12:02 PM MSTNON-TSTM WND GST 64Nnw Vedauwoo, WYVEDAUWOO WYDOT SITE. SUSTAINED WINDS 42 MPH.
Dec 19, 12:06 PM MSTNON-TSTM WND GST 601 Ene Buford, WYBUFORD EAST WYDOT SITE. SUSTAINED WINS 51 MPH.
Dec 19, 12:06 PM MSTNON-TSTM WND GST 662 Wnw Buford, WYLONE TREE WYDOT SITE. SUSTAINED WINDS 49 MPH.
Dec 19, 12:10 PM MSTNON-TSTM WND GST 671 Sse Bordeaux, WYBORDEAUX WYDOT SITE. SUSTAINED WINDS 56 MPH.
Dec 19, 12:12 PM MSTNON-TSTM WND GST 6210 Wsw Cheyenne, WYMILE POST 353 WYDOT SITE. SUSTAINED WINDS 42 MPH.
Dec 19, 12:16 PM MSTNON-TSTM WND GST 658 S Chugwater, WYBEAR CREEK WYDOT SITE. SUSTAINED WINDS 55 MPH.
Dec 19, 12:16 PM MSTNON-TSTM WND GST 6611 Se Arlington, WYSTROUSS HILL WYDOT SITE. SUSTAINED WINDS 44 MPH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 8.1 hours before the alert went out and 279 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.

Skew-T log-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2020-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2020-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1230 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

846 
WWUS75 KCYS 182008
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
108 PM MST Fri Dec 18 2020

WYZ110-191200-
/O.UPG.KCYS.HW.A.0038.201219T0600Z-201221T0000Z/
/O.NEW.KCYS.HW.W.0051.201219T0600Z-201221T1200Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
108 PM MST Fri Dec 18 2020

...HIGH WIND WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 AM
MST MONDAY...

* WHAT...West winds 35 to 55 mph with gusts up to 85 mph 
  expected.

* WHERE...North Snowy Range Foothills County.

* WHEN...From 11 PM this evening to 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high
  profile vehicles. Expect travel delays and possible road
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected in the 
  watch area. Visibilities may be reduced to below 2 miles at 
  times in blowing snow. Roads and highways may become slick and 
  icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-191200-
/O.UPG.KCYS.HW.A.0038.201219T0600Z-201221T0000Z/
/O.NEW.KCYS.HW.W.0051.201219T0900Z-201221T1200Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
108 PM MST Fri Dec 18 2020

...HIGH WIND WARNING IN EFFECT FROM 2 AM SATURDAY TO 5 AM MST
MONDAY...

* WHAT...West winds 40 to 50 mph with gusts up to 80 mph 
  expected.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills Counties.

* WHEN...From 2 AM Saturday to 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high
  profile vehicles. Expect travel delays and possible road
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected in the 
  watch area. Visibilities may be reduced to below 2 miles at 
  times in blowing snow. Roads and highways may become slick and 
  icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-191200-
/O.UPG.KCYS.HW.A.0038.201219T1600Z-201221T0000Z/
/O.NEW.KCYS.HW.W.0051.201219T1500Z-201221T0000Z/
Shirley Basin-East Platte County-Laramie Valley-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, and Laramie
108 PM MST Fri Dec 18 2020

...HIGH WIND WARNING IN EFFECT FROM 8 AM SATURDAY TO 5 PM MST
SUNDAY...

* WHAT...West winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Shirley Basin, East Platte County and Laramie Valley 
  Counties.

* WHEN...From 8 AM Saturday to 5 PM MST Sunday.

* IMPACTS...Extreme blowover risk for light weight and high
  profile vehicles. Expect travel delays and possible road
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ101-102-104-108-109-113-118-119-191200-
/O.NEW.KCYS.HW.A.0039.201220T0600Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
Central Laramie County-East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, Cheyenne, and Pine Bluffs
108 PM MST Fri Dec 18 2020

...HIGH WIND WATCH IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY
AFTERNOON...

* WHAT...West winds 35 to 45 mph with gusts up to 65 mph 
  possible.

* WHERE...Converse County Lower Elevations, Niobrara County, 
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central 
  Carbon County, Upper North Platte River Basin, Central Laramie 
  County and East Laramie County Counties.

* WHEN...From Saturday evening through Sunday afternoon.

* IMPACTS...Moderate blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel will
  be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Fasten loose objects or shelter objects in a safe
location prior to the onset of winds.

&&

$$
8 follow-up statements
236 
WWUS75 KCYS 190921
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
221 AM MST Sat Dec 19 2020

WYZ101-102-104-108-109-113-118-119-200000-
/O.UPG.KCYS.HW.A.0039.201220T0600Z-201221T0000Z/
/O.EXB.KCYS.HW.W.0051.201220T0600Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
Central Laramie County-East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, Cheyenne, and Pine Bluffs
221 AM MST Sat Dec 19 2020

...HIGH WIND WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 PM
MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 mph.

* WHERE...Converse County Lower Elevations, Niobrara County,
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central Carbon
  County, Upper North Platte River Basin, Central and East Laramie
  County.

* WHEN...From 11 PM Saturday to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile
  vehicles. Expect travel delays and possible road closures for
  light weight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ110-200000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
221 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 85 mph.

* WHERE...North Snowy Range Foothills including Arlington and Elk
  Mountain.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. Visibilities
  may be reduced below two miles at times in blowing snow. Roads 
  and highways may become slick and icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-200000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
221 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 mph.

* WHERE...Central Laramie Range and Southwest Platte County, South
  Laramie Range and South Laramie Range Foothills including
  Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. Visibilities
  may be reduced below two miles at times in blowing snow. Roads
  and highways may become slick and icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-200000-
/O.CON.KCYS.HW.W.0051.201219T1500Z-201221T0000Z/
Shirley Basin-East Platte County-Laramie Valley-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, and Laramie
221 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO
5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 65 mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley
  including Guernsey, Laramie, Shirley Basin and Wheatland.

* WHEN...From 8 AM Saturday to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
274 
WWUS75 KCYS 191650
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
950 AM MST Sat Dec 19 2020

WYZ118-200345-
/O.EXT.KCYS.HW.W.0051.201219T1650Z-201221T0000Z/
Central Laramie County-
Including the city of Cheyenne
950 AM MST Sat Dec 19 2020

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Central Laramie County to include the city of Cheyenne. 
 
* WHEN...Until 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ101-102-104-108-109-113-119-200345-
/O.EXT.KCYS.HW.W.0051.201219T2100Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, and Pine Bluffs
950 AM MST Sat Dec 19 2020

...HIGH WIND WARNING NOW IN EFFECT FROM 2 PM THIS AFTERNOON TO
5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Converse County Lower Elevations, Niobrara County,
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central Carbon
  County, Upper North Platte River Basin, and East Laramie 
  County.

* WHEN...From 2 PM this afternoon to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ110-200345-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
950 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 85 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and 
  Elk Mountain.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below two miles at times in 
  blowing snow. Roads and highways may become slick and icy due 
  to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-200345-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
950 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 
  mph.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills 
  including Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below two miles at times in 
  blowing snow. Roads and highways may become slick and icy due 
  to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-200345-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Shirley Basin-East Platte County-Laramie Valley-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, and Laramie
950 AM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 65 
  mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley 
  including Guernsey, Laramie, Shirley Basin and Wheatland.

* WHEN...From 8 AM Saturday to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
375 
WWUS75 KCYS 200251
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
751 PM MST Sat Dec 19 2020

WYZ110-201200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
751 PM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 85 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and 
  Elk Mountain.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below two miles at times in 
  blowing snow. Roads and highways may become slick and icy due 
  to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-201200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
751 PM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 
  mph.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills 
  including Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below two miles at times in 
  blowing snow. Roads and highways may become slick and icy due 
  to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-118-201200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Shirley Basin-East Platte County-Laramie Valley-
Central Laramie County-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, Laramie, and Cheyenne
751 PM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 65 
  mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley
  including Guernsey, Laramie, Shirley Basin and Wheatland.
  Central Laramie County including Cheyenne.

* WHEN...Until 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ101-102-104-108-109-113-119-201200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, and Pine Bluffs
751 PM MST Sat Dec 19 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SUNDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Converse County Lower Elevations, Niobrara County, 
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central 
  Carbon County, Upper North Platte River Basin, and East 
  Laramie County.

* WHEN...From 2 PM this afternoon to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

Rubin
943 
WWUS75 KCYS 200900
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
200 AM MST Sun Dec 20 2020

WYZ110-210000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
200 AM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 85 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and 
  Elk Mountain.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. Visibilities
  may be reduced below a mile at times in blowing snow. Roads and
  highways may become slick and icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-210000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
200 AM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 
  mph.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills 
  including Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. Visibilities
  may be reduced below a mile at times in blowing snow. Roads and
  highways may become slick and icy due to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-118-210000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Shirley Basin-East Platte County-Laramie Valley-
Central Laramie County-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, Laramie, and Cheyenne
200 AM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley
  including Guernsey, Laramie, Shirley Basin and Wheatland.
  Central Laramie County including Cheyenne, Laramie and
  Wheatland.

* WHEN...Until 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ101-102-104-108-109-113-119-210000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, and Pine Bluffs
200 AM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Converse County Lower Elevations, Niobrara County, 
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central 
  Carbon County, Upper North Platte River Basin, and East 
  Laramie County.

* WHEN...From 2 PM this afternoon to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
461 
WWUS75 KCYS 202006
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
106 PM MST Sun Dec 20 2020

WYZ110-211200-
/O.EXT.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
106 PM MST Sun Dec 20 2020

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 80 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and 
  Elk Mountain.

* WHEN...Until 5 PM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-211200-
/O.EXT.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
106 PM MST Sun Dec 20 2020

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 
  mph.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills 
  including Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 PM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-118-211200-
/O.EXT.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Shirley Basin-East Platte County-Laramie Valley-
Central Laramie County-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, Laramie, and Cheyenne
106 PM MST Sun Dec 20 2020

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley 
  including Guernsey, Laramie, Shirley Basin and Wheatland. 
  Central Laramie County including Cheyenne, Laramie and 
  Wheatland.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ101-102-104-108-109-113-119-210000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, and Pine Bluffs
106 PM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Converse County Lower Elevations, Niobrara County, 
  Ferris/Seminoe/Shirley Mountains, Goshen County, Central 
  Carbon County, Upper North Platte River Basin, and East 
  Laramie County.

* WHEN...From 2 PM this afternoon to 5 PM MST Sunday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
446 
WWUS75 KCYS 202351
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
451 PM MST Sun Dec 20 2020

WYZ101-102-104-108-109-113-119-210100-
/O.EXP.KCYS.HW.W.0051.000000T0000Z-201221T0000Z/
Converse County Lower Elevations-Niobrara County-
Ferris/Seminoe/Shirley Mountains-Goshen County-
Central Carbon County-Upper North Platte River Basin-
East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock, 
Lusk, Redbird, Seminoe Dam, Torrington, Rawlins, Saratoga, 
Encampment, and Pine Bluffs
451 PM MST Sun Dec 20 2020

...HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON...

Winds will continue to subside through the evening.

$$

WYZ110-211200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
451 PM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Sustained west winds 40 to 55 mph with gusts up to 80 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and 
  Elk Mountain.

* WHEN...Until 5 PM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-211200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
451 PM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 80 
  mph.

* WHERE...Central Laramie Range and Southwest Platte County, 
  South Laramie Range and South Laramie Range Foothills 
  including Bordeaux, Buford, Horse Creek and Vedauwoo.

* WHEN...Until 5 PM MST Monday.

* IMPACTS...Extreme blowover risk for light weight and high 
  profile vehicles. Expect travel delays and possible road 
  closures for light weight and high profile vehicles. Travel 
  will be difficult, especially for high profile vehicles.

* ADDITIONAL IMPACTS...Blowing snow is also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ105-107-115-118-211200-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Shirley Basin-East Platte County-Laramie Valley-
Central Laramie County-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, Laramie, and Cheyenne
451 PM MST Sun Dec 20 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 70 
  mph.

* WHERE...Shirley Basin, East Platte County and Laramie Valley 
  including Guernsey, Laramie, Shirley Basin and Wheatland. 
  Central Laramie County including Cheyenne, Laramie and 
  Wheatland.

* WHEN...Until 5 AM MST Monday.

* IMPACTS...High blowover risk for light weight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  light weight and high profile vehicles. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
888 
WWUS75 KCYS 211153
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
453 AM MST Mon Dec 21 2020

WYZ105-107-115-118-211300-
/O.EXP.KCYS.HW.W.0051.000000T0000Z-201221T1200Z/
Shirley Basin-East Platte County-Laramie Valley-
Central Laramie County-
Including the cities of Medicine Bow, Shirley Basin, Wheatland, 
Guernsey, Bosler, Laramie, and Cheyenne
453 AM MST Mon Dec 21 2020

...HIGH WIND WARNING WILL EXPIRE AT 5 AM MST EARLY THIS MORNING...

Sustained west winds of 25 to 35 mph with gusts to 50 mph will
continue today. The threat for high winds has ended, and the High
Wind Warning will be allowed to expire at 5 AM MST.

$$

WYZ110-220000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
453 AM MST Mon Dec 21 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

* WHAT...Sustained west winds 40 to 50 mph with gusts up to 70 
  mph.

* WHERE...North Snowy Range Foothills including Arlington and Elk
  Mountain.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...High blowover risk for lightweight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  lightweight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL IMPACTS...Areas of blowing snow are also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-116-117-220000-
/O.CON.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
Central Laramie Range and Southwest Platte County-
South Laramie Range-South Laramie Range Foothills-
Including the cities of Bordeaux, Buford, Pumpkin Vine, Vedauwoo,
Whitaker, Federal, and Horse Creek
453 AM MST Mon Dec 21 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

* WHAT...Sustained west winds 35 to 45 mph with gusts up to 65 
  mph.

* WHERE...South Laramie Range, South Laramie Range Foothills and
  Central Laramie Range and Southwest Platte County including
  Bordeaux, Federal, Horse Creek and Whitaker. 

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...High blowover risk for lightweight and high profile
  vehicles. Expect travel delays and possible road closures for
  lightweight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL IMPACTS...Patchy blowing snow is also expected.
  Visibilities may be reduced below three miles at times in 
  blowing snow. Roads and highways may become slick and icy due to
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$
540 
WWUS75 KCYS 212031
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
131 PM MST Mon Dec 21 2020

WYZ110-221200-
/O.CAN.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
/O.NEW.KCYS.HW.W.0052.201222T0800Z-201223T0300Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
131 PM MST Mon Dec 21 2020

...HIGH WIND WARNING IN EFFECT FROM 1 AM TO 8 PM MST TUESDAY...

* WHAT...Southwest winds 40 to 50 mph with gusts up to 70 mph 
  expected.

* WHERE...North Snowy Range Foothills County.

* WHEN...From 1 AM to 8 PM MST Tuesday.

* IMPACTS...High blowover risk for lightweight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  lightweight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL IMPACTS...Areas of blowing snow are also expected. 
  Visibilities may be reduced below a mile at times in blowing 
  snow. Roads and highways may become slick and icy due to 
  drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ116-117-221200-
/O.CAN.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
/O.NEW.KCYS.HW.W.0052.201222T1200Z-201223T0300Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Buford, Pumpkin Vine, Vedauwoo, Whitaker,
Federal, and Horse Creek
131 PM MST Mon Dec 21 2020

...HIGH WIND WARNING IN EFFECT FROM 5 AM TO 8 PM MST TUESDAY...

* WHAT...West winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...South Laramie Range and South Laramie Range Foothills 
  Counties.

* WHEN...From 5 AM to 8 PM MST Tuesday.

* IMPACTS...High blowover risk for lightweight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  lightweight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

* ADDITIONAL IMPACTS...Patchy blowing snow is also expected. 
  Visibilities may be reduced below three miles at times in 
  blowing snow. Roads and highways may become slick and icy due 
  to drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ106-221200-
/O.CAN.KCYS.HW.W.0051.000000T0000Z-201222T0000Z/
/O.NEW.KCYS.HW.W.0052.201222T1400Z-201223T0100Z/
Central Laramie Range and Southwest Platte County-
Including the city of Bordeaux
131 PM MST Mon Dec 21 2020

...HIGH WIND WARNING IN EFFECT FROM 7 AM TO 6 PM MST TUESDAY...

* WHAT...West winds 35 to 45 mph with gusts up to 70 mph 
  expected.

* WHERE...Central Laramie Range and Southwest Platte County 
  County.

* WHEN...From 7 AM to 6 PM MST Tuesday.

* IMPACTS...High blowover risk for lightweight and high profile 
  vehicles. Expect travel delays and possible road closures for 
  lightweight and high profile vehicles. Travel will be difficult,
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

What forecasters said that day

The local office's own words before this high wind warning 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 high wind warning went out at Dec 18, 10:14 AM MST, 2 hours 54 minutes earlier.

Area forecast discussion, Dec 18, 10:14 AM MST, 2 hours 54 minutes before
Area Forecast Discussion
National Weather Service Cheyenne WY
1014 AM MST Fri Dec 18 2020

.SHORT TERM...(Today through Sunday)
Issued at 330 AM MST Fri Dec 18 2020

Surface observations this morning showing widespread light snow
across most of Carbon county into western Albany and Converse
counties. Visibilities have been down to a 3/4 mile with heavier
bands of snow to the northwest. Current Winter Weather headlines
look good with accumulating snow reported across the Sierra Madre
Range and the northern Snowy Range near Elk Mountain, so no
changes are planned. Thought about adding SW Carbon county to the
Advisory since Dixon has shown around 1 to 2 miles visibility
since midnight, but expect snowfall to diminish in intensity once
the winds shift into the north over the next few hours. Snowfall
will gradually diminish around noon today with only remnant snow
showers expected across the mountains. Otherwise, cold
temperatures expected today with highs in the 20s and 30s. Windy
conditions expected for western Nebraska with gusts up to 40 mph
possible behind the front.

Primary forecast concern will then shift to strong gusty winds for
the weekend. Models are in a little better agreement with the
timing, but still struggle with the overall area of the strongest
winds. The GFS and 00z Canadian are in good agreement with the
onset of the winds, sometime later tonight around midnight across
the wind prone areas. These models show quite a bit of subsidence
in the 700mb to 800mb layer as early as 900 pm tonight, but 700mb
winds take a while to increase. 3 to 6 hour pressure tendencies
are -2 to -4 mb through the early morning hours on Saturday
across the high plains. Overall, expect the wind prone areas to
experience strong winds earlier than the high plains or high
valleys. Issued a High Wind Watch starting at 11 pm tonight
through Sunday afternoon. Added the Laramie Valley and portions of
the eastern plains of southeast Wyoming to the Watch after
sunrise Saturday. There is some uncertainty with the overall areal
coverage of the strongest winds and also the timing of the winds
outside the Wind Prone areas. A few models suggest Sunday will be
the primary day for gusts over 60 mph across the eastern plains as
the first anticyclonic jet streak rapidly moves across the area
and lifts north. While others suggest strong winds as early as
Saturday morning. In addition, GFS omega fields and 700mb winds
suggest Watches/Warnings may be needed further east towards the
western Nebraska panhandle, especially on Sunday. Decided to add
the areas that are most likely to experience strong winds both
days, to the High Wind Watch based on in-house wind models, and
let the day and evening crew adjust based on model trends. For the
Wind Prone areas, expect this to be a long duration event lasting
36+ hours with a slight lull Saturday night. With a strong
downslope wind component, expect a gradual increase in daytime
temperatures across the area with highs above normal by Sunday
afternoon. This should limit blowing snow west of the Laramie
Range, especially around the Wind Prone areas.

.LONG TERM...(Monday - Friday)
Issued at 300 AM MST Fri Dec 18 2020

Strong winds will continue into early Monday at least for
the wind prone areas of Southeast Wyoming as 700 mb CAG-CPR height
gradients based off the 00z GFS remain above 70 meters through
09z before dropping off later in the day along with the 700 mb
flow. Winds look to increase again Tuesday with an approaching 500
mb low and associated lee side troughing. This progressive trough
will once again bring the chance for snow, especially west of the
Laramie Range. Significant snow accumulation is not expected, but
another inch is possible at lower elevations while the Sierra
Madre and Snowy Ranges higher peaks should see slightly higher
amounts. Current QPF forecasts show anywhere from 0.15 to 0.25
inches at this higher peaks with the ECMWF being slightly on the
higher side at this time. Regardless, that amount would still
result in sub- advisory level conditions. As with the past few
days, models are in fairly good agreement with the progression of
this trough with a second kick of energy shooting down from the
Canadian Prairie over the Central US that will foster much colder
air into the area. Highs over the Nebraska Panhandle Monday and
Tuesday will be in the 40s and low 50s while Wednesday's
temperatures could struggle to reach the 30s with overnight lows
dropping down to near 10F. A brief break in active weather looks
to settle in for week's end and the holiday period, however
heading into next weekend another windy pattern looks possible.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday morning)
Issued at 1014 AM MST Fri Dec 18 2020

Some MVFR cigs and snow showers will occur initially over the area
from about KLAR to KCYS to KSNY but is expected to improve to VFR
during the afternoon.  VFR expected elsewhere through the period.
Gusty northerly winds up to 30 kts over far se Wy and the Panhandle,
easing towards 00Z.

&&

.FIRE WEATHER...
Issued at 229 AM MST Fri Dec 18 2020

No fire weather concerns Friday through early next week with
windy conditions expected, especially across southeast Wyoming,
and periods of snow through Friday afternoon. Temperatures will
generally remain near or below average until Sunday, with a slight
warming trend expected Sunday through Tuesday. Daytime minimum
humidities will trend lower, but still remain above 25 percent for
most locations.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...High Wind Watch from this evening through Sunday afternoon for
     WYZ106-110-116-117.

     Winter Weather Advisory until 5 PM MST this afternoon for WYZ110-
     112.

     High Wind Watch from Saturday morning through Sunday afternoon
     for WYZ105-107-115.

NE...None.
&&

SHORT TERM...TJT
LONG TERM...MB
AVIATION...RE
FIRE WEATHER...TJT
Hazardous weather outlook, Dec 18, 4:18 AM MST, 8 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
418 AM MST Fri Dec 18 2020

WYZ101-103>107-109>118-191130-
Converse County Lower Elevations-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte 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-
418 AM MST Fri Dec 18 2020

This hazardous weather outlook is for portions of east central
Wyoming and southeast Wyoming, mainly for areas along and west of
Interstate 25.

.DAY ONE...TODAY AND TONIGHT

Light snow will continue this morning with up to 2 inches in the
lower elevations. Higher amounts of snow are expected for the
mountains and the Elk Mountain and Arlington areas where Winter
Weather Advisories remain in effect through this afternoon.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Another round of strong gusty winds will begin early Saturday
morning across most of southeast Wyoming. A High Wind Watch is in
effect for portions of the area through Sunday afternoon for wind
gusts over 60 mph. Strong winds may continue through early Monday
morning.

.Spotter information statement...

Spotters are encouraged to report snowfall totals to the National
Weather Service in Cheyenne.

NEZ002-003-019>021-054-055-095-096-WYZ102-108-119-191130-
Dawes-Box Butte-Scotts Bluff County-Banner County-Morrill-
Kimball County-Cheyenne-North Sioux-South Sioux-Niobrara County-
Goshen County-East Laramie County-
418 AM MST Fri Dec 18 2020

This hazardous weather outlook is for portions of panhandle
Nebraska...western Nebraska...east central Wyoming and southeast
Wyoming.

.DAY ONE...TODAY AND TONIGHT

A band of light snow will move across western Nebraska and far
eastern Wyoming this morning. Little or no accumulation is
expected outside the higher ridges. The Pine Ridge, Wildcat hills,
and the Cheyenne Ridge may see a half inch to one inch of snow
accumulation this morning.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

West to northwest winds will increase this weekend. Gusts between
45 to 55 mph are possible across far eastern Wyoming and portions
of western Nebraska.

.Spotter information statement...

Spotter activation will not be needed.

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 18, 2:42 AM MSTHigh Wind WatchCYSAlbany, Carbon, Laramie, Platte10 hr
Dec 18, 1:08 PM MSTHigh Wind WatchCYSCarbon, Converse, Goshen, Laramie, Niobrara13 hr

Nearby

High Wind Warnings in Wyoming, 2020Every high wind warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.