Alert archive / Wyoming / High Wind Warnings in 2024

High Wind Warning 2, NWS Cheyenne, WY

January 11, 20244 counties in Wyoming

NWS Cheyenne, WY issued this high wind warning at Jan 11, 2024, 1:49 PM MST for 4 counties in Wyoming. It took effect at Jan 11, 2024, 11:00 PM MST. It was in force for 25 hr. 34 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
Jan 11, 2024, 1:49 PM MST (20:49 UTC)
In effect from
Jan 11, 2024, 11:00 PM MST
Expired
Jan 13, 2024, 12:00 AM MST
In force
25 hr
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 88 km from the middle of the area, began a volume at 20:52 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
Jan 12, 3:50 AM MSTNON-TSTM WND GST 614 W Muddy Gap, WY
Jan 12, 6:50 AM MSTNON-TSTM WND GST 614 W Muddy Gap, WY
Jan 12, 8:42 AM MSTNON-TSTM WND GST 623 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 9:26 AM MSTNON-TSTM WND GST 663 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 10:32 AM MSTNON-TSTM WND GST 593 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 11:12 AM MSTNON-TSTM WND GST 6111 Se Arlington, WYMesonet station WY25 10.7 SE Arlington (WYDOT).
Jan 12, 11:22 AM MSTNON-TSTM WND GST 583 Nw Elk Mountain, WYMesonet station WY19 2.9 NW Elk Mountain (WYDOT).
Jan 12, 11:56 AM MSTNON-TSTM WND GST 733 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 1:56 PM MSTSNOW SQUALL3 Ese Elk Mountain, WYWebcams and Highway Observations confirm 1/8 mile visibility with frequent wind gusts 50+ MPH along I-80 between MM 261-267.
Jan 12, 2:48 PM MSTSNOW SQUALLArlington, WYNumerous Webcams and Highway Observations along I-80 between MMs 260 and 275 confirm visibilities to 1/8 mile or less with wind gusts 55+ MPH. The WYDOT sensor at Wagonhound recorded a visibility of 0.05 mile with a 63 MPH wind gust at 256 PM.
Jan 12, 3:12 PM MSTSNOW SQUALLArlington, WYThe WYDOT sensor at Arlington (KARL) recorded a visibility of 1/10 mile and a peak wind gust to 51 MPH.
Jan 12, 4:26 PM MSTNON-TSTM WND GST 613 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 4:35 PM MSTSNOW SQUALL5 Nw Arlington, WYWebcams and WYDOT observations confirm visibilities below 1/8th of a mile in heavy snow and strong winds up to 50 MPH for over 30 minutes.
Jan 12, 4:50 PM MSTSNOW SQUALL3 E Arlington, WYArlington east WYDOT sensor reported wind gusts of 40 MPH and heavy snow with visibility down to below one quarter of a mile for 50 minutes.
Jan 12, 5:00 PM MSTSNOW SQUALLSinclair, WYWYDOT sensor at Sinclair and ASOS at Rawlins both reported less than one quarter mile visibility and wind gusts up to 47 MPH.
Jan 12, 5:46 PM MSTNON-TSTM WND GST 572 E Arlington, WYMesonet station WY23 1.6 E Arlington (WYDOT).
Jan 12, 5:56 PM MSTSNOW SQUALL15 Nne Centennial, WYWYDOT OBSERVATION AT STROUSS HILL reported 1/8th of a mile visibility and wind gusts of 50 MPH for 15 minutes.
Jan 12, 6:52 PM MSTNON-TSTM WND GST 615 Nw Arlington, WYMesonet station WY21 5.5 NW Arlington (WYDOT).
Jan 12, 6:52 PM MSTNON-TSTM WND GST 653 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 6:52 PM MSTNON-TSTM WND GST 663 Nw Arlington, WYMesonet station WY22 2.7 NW Arlington (WYDOT).
Jan 12, 7:06 PM MSTNON-TSTM WND GST 583 Nw Elk Mountain, WYMesonet station WY19 2.9 NW Elk Mountain (WYDOT).
Jan 12, 7:06 PM MSTNON-TSTM WND GST 663 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 7:12 PM MSTNON-TSTM WND GST 585 Nw Arlington, WYMesonet station WY21 5.5 NW Arlington (WYDOT).
Jan 12, 7:16 PM MSTNON-TSTM WND GST 582 E Arlington, WYMesonet station WY23 1.6 E Arlington (WYDOT).
Jan 12, 7:16 PM MSTNON-TSTM WND GST 583 Nw Arlington, WYMesonet station WY22 2.7 NW Arlington (WYDOT).
Jan 12, 8:12 PM MSTNON-TSTM WND GST 623 Nw Arlington, WYMesonet station WY22 2.7 NW Arlington (WYDOT).
Jan 12, 8:26 PM MSTNON-TSTM WND GST 633 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).
Jan 12, 8:36 PM MSTNON-TSTM WND GST 585 Nw Arlington, WYMesonet station WY21 5.5 NW Arlington (WYDOT).
Jan 12, 8:46 PM MSTNON-TSTM WND GST 657 Ese Arlington, WYMesonet station WY24 6.9 E Arlington (WYDOT).
Jan 12, 8:52 PM MSTNON-TSTM WND GST 581 Nnw Arlington, WYMesonet station KARL 0.6 NW Arlington (WYDOT).
Jan 12, 9:06 PM MSTNON-TSTM WND GST 592 E Arlington, WYMesonet station WY23 1.6 E Arlington (WYDOT).
Jan 12, 9:16 PM MSTNON-TSTM WND GST 645 Nw Arlington, WYMesonet station WY21 5.5 NW Arlington (WYDOT).
Jan 12, 9:26 PM MSTNON-TSTM WND GST 587 Ese Arlington, WYMesonet station WY24 6.9 E Arlington (WYDOT).
Jan 12, 9:42 PM MSTNON-TSTM WND GST 593 Ese Elk Mountain, WYMesonet station WY20 2.5 SE Elk Mountain (WYDOT).

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, 8.8 hours before the alert went out and 278 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 2024-01-11Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2024-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
787 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

276 
WWUS75 KCYS 112049
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
149 PM MST Thu Jan 11 2024

WYZ109-111-113-112200-
/O.CAN.KCYS.HW.A.0003.240112T1200Z-240113T0000Z/
Central Carbon County-Southwest Carbon County-
Upper North Platte River Basin-
Including the cities of Rawlins, Baggs, Saratoga, and Encampment
149 PM MST Thu Jan 11 2024

...HIGH WIND WATCH IS CANCELLED...

Winds will be strong across central and southern Carbon 
County...but expected to remain below warning levels.
Therefore...the High Wind Watch has been cancelled and replaced
with a Winter Weather Advisory.

$$

WYZ106-121230-
/O.UPG.KCYS.HW.A.0003.240112T0600Z-240112T2100Z/
/O.NEW.KCYS.HW.W.0002.240112T0600Z-240112T2100Z/
Central Laramie Range and Southwest Platte County-
Including the city of Bordeaux
149 PM MST Thu Jan 11 2024

...HIGH WIND WARNING IN EFFECT FROM 11 PM THIS EVENING TO 2 PM
MST FRIDAY...

* WHAT...West winds 35 to 45 mph with gusts up to 70 mph expected.
  Areas of blowing snow reducing visibility under a half mile
  Friday afternoon.

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

* WHEN...From 11 PM this evening to 2 PM MST Friday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

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.

&&

$$

WYZ110-121230-
/O.UPG.KCYS.HW.A.0003.240112T0600Z-240113T0000Z/
/O.NEW.KCYS.HW.W.0002.240112T0600Z-240113T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
149 PM MST Thu Jan 11 2024

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

* WHAT...West winds 35 to 55 mph with gusts up to 70 mph expected.
  Areas of blowing snow reducing visibility under a half mile
  Friday afternoon.

* WHERE...North Snowy Range Foothills.

* WHEN...From 11 PM this evening to 5 PM MST Friday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

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.

&&

$$

WYZ104-105-115>118-121230-
/O.UPG.KCYS.HW.A.0003.240112T1200Z-240113T0000Z/
/O.NEW.KCYS.HW.W.0002.240112T1200Z-240113T0000Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, and Cheyenne
149 PM MST Thu Jan 11 2024

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

* WHAT...West winds 35 to 45 mph with gusts up to 70 mph expected.
  Areas of blowing snow reducing visibility under a half mile
  Friday afternoon.

* WHERE...Ferris/Seminoe/Shirley Mountains, Shirley Basin, 
  Laramie Valley, South Laramie Range, South Laramie Range 
  Foothills and Central Laramie County.

* WHEN...From 5 AM to 5 PM MST Friday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

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.

&&

$$
4 follow-up statements
572 
WWUS75 KCYS 120955
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
255 AM MST Fri Jan 12 2024

WYZ106-122100-
/O.CON.KCYS.HW.W.0002.000000T0000Z-240112T2100Z/
Central Laramie Range and Southwest Platte County-
Including the city of Bordeaux
255 AM MST Fri Jan 12 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON...

* WHAT...West winds 30 to 40 mph with gusts up to 65 mph.

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

* WHEN...Until 2 PM MST this afternoon.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts of
58 mph or more can lead to property damage.

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ110-130000-
/O.CON.KCYS.HW.W.0002.000000T0000Z-240113T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
255 AM MST Fri Jan 12 2024

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

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

* WHERE...North Snowy Range Foothills.

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

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts of
58 mph or more can lead to property damage.

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ104-105-115>118-130000-
/O.CON.KCYS.HW.W.0002.240112T1200Z-240113T0000Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, and Cheyenne
255 AM MST Fri Jan 12 2024

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

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Ferris/Seminoe/Shirley Mountains, Shirley Basin, 
  Laramie Valley, South Laramie Range, South Laramie Range 
  Foothills and Central Laramie County.

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

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts of
58 mph or more can lead to property damage.

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
519 
WWUS75 KCYS 121912
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
1212 PM MST Fri Jan 12 2024

WYZ106-122015-
/O.CAN.KCYS.HW.W.0002.000000T0000Z-240112T2100Z/
Central Laramie Range and Southwest Platte County-
Including the city of Bordeaux
1212 PM MST Fri Jan 12 2024

...HIGH WIND WARNING IS CANCELLED...

Winds have turned northerly at Bordeaux behind an arctic front
moving south. Strong winds are no longer expected. Therefore...the
High Wind Warning has been expired early.

$$

WYZ110-130000-
/O.CON.KCYS.HW.W.0002.000000T0000Z-240113T0000Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
1212 PM MST Fri Jan 12 2024

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

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

* WHERE...North Snowy Range Foothills.

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

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

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.

&&

$$

WYZ104-105-115>118-130000-
/O.CON.KCYS.HW.W.0002.000000T0000Z-240113T0000Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, and Cheyenne
1212 PM MST Fri Jan 12 2024

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

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Ferris/Seminoe/Shirley Mountains, Shirley Basin, 
  Laramie Valley, South Laramie Range, South Laramie Range 
  Foothills and Central Laramie County.

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

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. Areas of blowing snow may result 
  in localized areas of significantly reduced visibilities at 
  times, along with slick road conditions.

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.

&&

$$
514 
WWUS75 KCYS 122347
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
447 PM MST Fri Jan 12 2024

WYZ104-105-115>118-130100-
/O.EXP.KCYS.HW.W.0002.000000T0000Z-240113T0000Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Bosler, Laramie, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, and Cheyenne
447 PM MST Fri Jan 12 2024

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

Winds have decreased below warning criteria, therefore, this 
warning will expire on time.

$$

WYZ110-130700-
/O.EXT.KCYS.HW.W.0002.000000T0000Z-240113T0700Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
447 PM MST Fri Jan 12 2024

...HIGH WIND WARNING NOW IN EFFECT UNTIL MIDNIGHT MST TONIGHT...

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

* WHERE...North Snowy Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Mainly to transportation. Strong cross winds will be
  hazardous to light weight or high profile vehicles, including
  campers and tractor trailers. Areas of blowing snow may result
  in localized areas of significantly reduced visibilities at
  times, along with slick road conditions.

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.

&&

$$
491 
WWUS75 KCYS 130653
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
1153 PM MST Fri Jan 12 2024

WYZ110-130800-
/O.EXP.KCYS.HW.W.0002.000000T0000Z-240113T0700Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
1153 PM MST Fri Jan 12 2024

...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MST TONIGHT...

High winds across this region have diminished allowing the high
wind warning to expire.

$$

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 Jan 11, 10:33 AM MST, 3 hours 16 minutes earlier. Its key messages:

  • Strong winds will return across the wind prone corridors and areas along and west of the Laramie Range in southeast Wyoming late tonight into Friday. High Wind Watches have been issued.
  • Mountain snow continues, with high-elevation travel likely to remain very difficult or impossible for some time. Winter Storm Warnings remain in effect for the Snowy and Sierra Madre ranges through Saturday AM.
  • Extremely cold temperatures and wind chill values are expected across much of SE Wyoming and the Nebraska Panhandle this weekend. A Wind Chill Watches and Warnings have been issued for portions of southeast Wyoming and the entire Nebraska Panhandle.
  • Widespread light to moderate snow expected Thursday as a cold front moves into the northern Nebraska Panhandle and Niobrara County in east central Wyoming. Winter Weather Advisories in effect 5AM through 5PM Thursday. Another round of light snowfall is expected on Friday, with the potential of snow squalls along the Interstate 25 and 80 corridor Friday PM. Winter Weather Advisories in effect 5AM Friday through 5PM Friday.
Area forecast discussion, Jan 11, 10:33 AM MST, 3 hours 16 minutes before
Area Forecast Discussion
National Weather Service Cheyenne WY
1033 AM MST Thu Jan 11 2024

.KEY MESSAGES...

- Strong winds will return across the wind prone corridors and
  areas along and west of the Laramie Range in southeast Wyoming
  late tonight into Friday. High Wind Watches have been issued.

- Mountain snow continues, with high-elevation travel likely to
  remain very difficult or impossible for some time. Winter
  Storm Warnings remain in effect for the Snowy and Sierra Madre
  ranges through Saturday AM.

- Extremely cold temperatures and wind chill values are expected
  across much of SE Wyoming and the Nebraska Panhandle this
  weekend. A Wind Chill Watches and Warnings have been issued
  for portions of southeast Wyoming and the entire Nebraska
  Panhandle.

- Widespread light to moderate snow expected Thursday as a cold
  front moves into the northern Nebraska Panhandle and Niobrara
  County in east central Wyoming. Winter Weather Advisories in
  effect 5AM through 5PM Thursday. Another round of light
  snowfall is expected on Friday, with the potential of snow
  squalls along the Interstate 25 and 80 corridor Friday PM.
  Winter Weather Advisories in effect 5AM Friday through 5PM
  Friday.

&&

&&

.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 404 AM MST Thu Jan 11 2024

It's a tricky and complicated short term forecast package to
chat about early this morning for the local weather enthusiasts.
The well-advertised bitter cold temperatures will make their
trek southward toward our cwa via a surface cold front today and
tonight. Local snow showers should bring light snowfall
accumulations to most areas in the lower terrain via an attendant
shortwave disturbance aloft. Looking at the satellite imagery
with the focus on the water vapor spectrum, we can visually see
the baroclinic leaf beginning to develop in a southwest to
northeast transect over the Intermountain West via the warm
conveyor belt. Highest snowfall accumulations will be confined
to the Pine Ridge and Cheyenne Ridge today for locations east of
the Laramie Range. Additionally, with continued impulses of jet
energy embedded within the west-northwest flow aloft, the Snowy
and Sierra Madre Ranges will do very well for additional
accumulations. Went with an extension to the current Winter
Storm Warning through early Saturday morning, which could
ultimately be extended further than that as daily chances of
snow there exists into early next week.

The next 36 hours will be extremely active for weather across
our region. We will have the Arctic temperatures advancing
toward our cwa, quickly tightening surface pressure gradients
resulting in gusty to strong winds, and additional snowfall
accumulation chances. The next shortwave approaches our cwa late
tonight, with 700mb winds increasing quickly between 0z-6z
Friday. Mountain wave activity is advertised ahead of the
approaching snow showers associated with frontogenetic
forcing/isentropic ascent aloft. There will be a narrow window
where winds at 700mb ramp up to 45-60 knots, and this has led to
confidence of a possible high wind event for late tonight into
Friday for areas along the Central Laramie Range and south to
the WY border. The Arctic cold front is expected to become
nestled up against the higher Front Range and Laramie Range
terrain due to its very cold, dense air mass. Eventually it is
modeled to saddle up against the Snowy/Sierra Madre Range for
our cwa concerns. This will cause gusty winds of 45-65+ mph. The
tough part to fine tune is just how far east the subsidence will
stretch off the South Laramie Range and foothills. Went with a
nudge of High Wind Watches into central Laramie County and to
the west across Carbon County as a safeguard. While we have
gusty winds developing on Friday, localized snow squalls will be
possible along the Interstate 80 and Interstate 25 corridor from
the cold front and attendant shortwave disturbance aloft. The
toughest part to convey in the winter and wind headlines is
whether the gusty winds will be due to the tightening surface
pressure gradients, or from localized moderate to heavy snow
bands. The HRRR/RAP/NAM are all pinging the Interstate 25/80
corridor from approximately 18z-0z Friday afternoon for snow
squall activity, as far east as the southern tier of the NE
Panhandle. Have decided to go with Winter Weather Advisories
from early Friday morning into the afternoon hours to reflect
the light snowfall with localized brief moderate to heavy snow
showers that could create a flash/freeze event for portions of
the cwa. Extremely bitter cold air behind the cold FROPA
combined with the breezy to strong winds will cause actual air
temperatures and wind chills to plummet. To be transparent, this
appears to be similar to our flash freeze Arctic air mass event
in December of 2022 where temperatures dropped in Cheyenne by
over 40 degrees in one hour. While there are similarities, the
sharp drop won't be as large this time around, but overnight
lows will tank quickly due to local snowfall also. Temperatures
in the negative teens to negative 20s (below zero) with much
colder wind chills warranted the issuance and expansion of Wind
Chill headlines. Wind chills by Saturday morning will be in the
-25F to -50F range, especially our northern forecast zones and
mountain zones. Please stay tuned for forecast updates as the
bitter cold temperatures make their way toward our region.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Issued at 404 AM MST Thu Jan 11 2024

.ARCTIC OUTBREAK TO BRING EXTREMELY COLD TEMPERATURES AND WIND
CHILLS..

There is high confidence (>80%)for an outbreak of Arctic air to
impact all of the Nebraska Panhandle areas east of the Laramie Range
beginning Friday night and continuing through the weekend and into
next week. Models, MOS guidance and the NBM have continued to drop
temperatures in their respective outputs over the past 24 hours. The
first areas to experience this Arctic air will be across Converse,
Niobrara, and the northern Nebraska Panhandle with the arrival of
the arctic front. Associated with this arctic airmass will be breezy
conditions which will drive those dangerously cold wind chill values
across these areas. The arctic air will continue to move south and
west Saturday and effect all of the Nebraska Panhandle and locations
east of the Laramie Range. Taking a blend of NBM, the previous
forecast and MOS guidance has maximum temperatures on Saturday and
Sunday ranging from zero to -10 across the I-25 corridor, North
Platte River valley, and the Nebraska Panhandle. Couple these
ambient air temperatures with forecast winds between 15-20 mph and
we are expecting wind chill values Saturday and Sunday night to drop
into the -30 to -45F. With confidence increasing the previously
issued Wind Chill Watch has been upgraded to a Wind Chill warning
beginning Friday night through Monday. Additionally the I-80 corridor
from Sidney to the I-80 Summit and parts of I-25 from Cheyenne to
Bordeaux has been put into a Wind Chill Watch.

The main changes made with this forecast package were to adjust
temperatures based on new model and MOS guidance. The rest of the
forecast package regarding the valley and mountain snow chances and
accumulation remains on track from the previous forecast package
(Posted below this section). Storm total snow accumulations for the
Sierra Madre and Snowy mountains look to reach winter storm criteria
with this next round of snowfall, but with active highlights already
out for these areas to cover the current event decided to forgo
issuing any additional highlights but if trends hold, new winter
highlights may be needed once the current highlights expire.

...(Previous Long Term Forecast)

Active weather with bitterly cold temperatures and wind chills
expected this weekend through much of the work week. Several swaths
of jet energy and vorticity maxima will traverse overhead Saturday
through the early portions of next week. Initially, on Saturday, a
broad upper-level trough will be positioned across much of the
northern and north central CONUS. Two strong jet streaks will be
positioned across western Montana/central Wyoming and across eastern
Oregon, southern Idaho, and western Utah. The second jet streak
drifts north and punches into central Wyoming by Saturday evening,
placing the CWA in a favorable location for enhanced synoptic lift.
This lift is coupled with modest 500mb cyclonic vorticity advection
and favorable 700mb and surface winds for upslope development along
the higher terrain. Mountain snow showers look very likely (80 to 90
percent) Saturday as upslope develops and the jet energy pushes into
the region. Even the lower elevations are expected to see some snow
with the evolution of the upper-level flow. Northwesterly flow
remains aloft advecting in relatively moist air and very cold
temperatures. Winds will be elevated Saturday with the highest
elevations and the Arlington wind prone zone at near high wind
criteria. 700mb temperatures will hover between -10C in the
southwestern CWA and -20C in the northeastern CWA, with winds across
the Panhandle approaching 10 to 15kts. Cold 700mb temperatures, cold
surface temperatures, and winds will lead to dangerous wind chill
values across the Nebraska Panhandle on Saturday. A Wind Chill Watch
is in effect for wind chill values between -30 and -40F across the
Panhandle. High temperatures Saturday expected to be in the single
digits and negative single digits east of the Laramie Range and well
into the 20s west of the Laramie Range. The arctic cold across the
Panhandle will delay slightly before finally dropping into southeast
Wyoming on Sunday.

A second swath of jet energy dives down into the western Montana,
central Wyoming, and northern Colorado on Sunday. While weaker than
the jet energy on Saturday, this swath of energy will continue to
enhance synoptic lift across the region with supporting 500mb CVA.
Snow showers continue to be possible to likely (20 to 60 percent)
across the lower elevations. Mountain snow shower persist Sunday
with the additional jet energy, CVA, and favorable winds for upslope
development. 700mb temperatures continue to drop across the CWA with
the entire region expected to see 700mb temperatures between -15 and
-25C. High temperatures Sunday are expected to be in the single
digits to negative single digits area-wide. Unfortunately, winds
will continue to persistent enough to lead to bitterly cold wind
chill values. Wind chill values will drop to -30 to -45 area-wide,
with the "warmest" wind chills west of the Laramie Range. Will
likely need to extend the Wind Chill Watch to include much of the
CWA, but will leave the final decision to the evening and overnight
shifts as there is still ample time between now and these bitterly
cold wind chills.

The last bit of additional jet energy pushes through the region
early Monday morning with northwesterly to westerly winds remaining
aloft. A swath of increased 500mb vorticity will traverse just
northeast of the CWA with only a few, small vorticity maxima
traversing overhead. 700mb temperatures begin to warm into the
single digit negative numbers with less favorable upslope flow
across the Sierra Madres and Snowies. Snow chances drop for Monday
and the remaining long term. Despite the warmer 700mb temperatures,
a snowpack will likely be present on the ground. This will prevent
temperatures from warming significantly. Highs on Monday are
expected to be in the positive single digits to positive teens
across the region, which will be much warmer than the previous day.
Winds chill values will likely remain bitterly cold Monday morning,
but gradually increase through the mid-morning and afternoon hours.
Wind chill values will likely remain in the negative teens until
Monday night when they drop back down towards the -20s. Overall, a
very cold start to the beginning of the week. Finally, an upper-
level ridge begins to develop and move into the western CONUS
Tuesday into Wednesday. Under this ridge, temperatures will begin to
increase towards near-normal.

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1028 AM MST Thu Jan 11 2024

Arctic front has pushed south and west of the Laramie Range this
morning. Light snow causing IFR/LIFR conditions in the Panhandle
will continue to decrease in coverage through the early
afternoon before clouds begin to break up after 21-22Z.
Generally used LAMP and HRRR guidance on timing of lifting
ceilings and ending snow. Snow returning tonight for KRWL with
increasing winds for our southeast Wyoming airports.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Winter Weather Advisory until 5 PM MST this afternoon for
     WYZ102.
     Wind Chill Warning from 5 PM Friday to 6 AM MST Monday for
     WYZ101>103-107-108.
     Winter Weather Advisory from 5 AM to 5 PM MST Friday for
     WYZ101-107-108-119.
     Wind Chill Watch from Friday afternoon through late Sunday
     night for WYZ106-116>119.
     High Wind Watch from late tonight through Friday afternoon for
     WYZ104-105-109-111-113-115>118.
     High Wind Watch from this evening through Friday afternoon for
     WYZ106.
     High Wind Watch from this evening through Friday afternoon for
     WYZ110.
     Winter Storm Warning until 5 AM MST Saturday for WYZ112-114.
NE...Winter Weather Advisory until 5 PM MST this afternoon for
     NEZ002-003-095-096.
     Wind Chill Warning from 5 PM Friday to 6 AM MST Monday for
     NEZ002-003-019-021-095-096.
     Winter Weather Advisory from 5 AM to 5 PM MST Friday for
     NEZ019>021-054-055.
     Wind Chill Watch from Friday afternoon through late Sunday
     night for NEZ020-054-055.

&&

SHORT TERM...BW
LONG TERM...AW
AVIATION...GCC
Hazardous weather outlook, Jan 11, 4:02 AM MST, 9 hours 47 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
402 AM MST Thu Jan 11 2024

WYZ104-105-109>111-113-115-121115-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Laramie Valley-
402 AM MST Thu Jan 11 2024

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE TO SEVEN...TODAY THROUGH WEDNESDAY

- Strong winds will persist across the wind prone corridors and
  west of the Laramie Range in southeast Wyoming late tonight into
  Friday.

- Mountain snow continues, with high-elevation travel likely to
  remain very difficult or impossible for some time. Blowing snow
  is expected during peak wind times.

- Extremely cold temperatures and wind chill values are expected
  across much of SE Wyoming Friday evening through early next
  week.

- Widespread light to moderate snow expected today as a cold front
  moves into the northern Nebraska Panhandle and Niobrara County
  in east central Wyoming.

- Snow chances possible everywhere Saturday through Monday with
  the higher terrain likely seeing daily snow showers throughout
  the long term.

.Spotter information statement...

Spotters are encouraged to report strong wind gusts in excess of
58mph or snowfall accumulations in excess of two inches to NWS
Cheyenne via social media or telephone at 307-772-2468.

WYZ112-114-121115-
Sierra Madre Range-Snowy Range-
402 AM MST Thu Jan 11 2024

This hazardous weather outlook is for portions of south central
Wyoming.

.DAY ONE TO SEVEN...TODAY THROUGH WEDNESDAY

- Strong winds will persist across the wind prone corridors and
  west of the Laramie Range in southeast Wyoming late tonight into
  Friday.

- Mountain snow continues, with high-elevation travel likely to
  remain very difficult or impossible for some time. Blowing snow
  is expected during peak wind times. Winter Storm Warnings in
  effect through 5am MST Saturday.

- Extremely cold temperatures and wind chill values are expected
  across much of SE Wyoming Friday evening through early next
  week.

- Widespread light to moderate snow expected today as a cold front
  moves into the northern Nebraska Panhandle and south toward the
  remainder of Wyoming.

- Snow chances possible everywhere Saturday through Monday with
  the higher terrain likely seeing daily snow showers throughout
  the long term.

.Spotter information statement...

Spotters are encouraged to report strong wind gusts in excess of
58mph or snowfall accumulations in excess of two inches to NWS
Cheyenne via social media or telephone at 307-772-2468.

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119-
121115-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
402 AM MST Thu Jan 11 2024

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

.DAY ONE TO SEVEN...TODAY THROUGH WEDNESDAY

- Strong winds will persist across the wind prone corridors and
  west of the Laramie Range in southeast Wyoming late tonight into
  Friday. A High Wind Watch is in effect for portions of SE
  Wyoming.

- Mountain snow continues, with high-elevation travel likely to
  remain very difficult or impossible for some time. Blowing snow
  is expected during peak wind times.

- Extremely cold temperatures and wind chill values are expected
  across much of SE Wyoming Friday evening through early next
  week. Wind Chill Warnings and Watches have been issued.

- Widespread light to moderate snow expected today as a cold front
  moves into the northern Nebraska Panhandle and Niobrara County
  in east central Wyoming.

- Snow chances possible everywhere Saturday through Monday with
  the higher terrain likely seeing daily snow showers throughout
  the long term.

.Spotter information statement...

Spotters are encouraged to report strong wind gusts in excess of
58mph or snowfall accumulations in excess of two inches to NWS
Cheyenne via social media or telephone at 307-772-2468.

BW

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 11, 3:19 AM MSTWind Chill WatchCYSAlbany, Laramie, Platte11 hr
Jan 11, 3:19 AM MSTWind Chill WarningCYSAlbany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more5 days
Jan 11, 3:19 AM MSTWinter Weather AdvisoryCYSAlbany, Carbon, Converse, Goshen, Laramie, Platte50 hr
Jan 11, 3:24 AM MSTHigh Wind WatchCYSAlbany, Carbon, Laramie, Platte10 hr

Nearby

High Wind Warnings in Wyoming, 2024Every high wind warning in 2024

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.