High Wind Watch 13, NWS Cheyenne, WY

693 
WWUS75 KCYS 062124
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
224 PM MST Thu Feb 6 2025

WYZ104-071200-
/O.UPG.KCYS.HW.A.0013.250207T1200Z-250208T1200Z/
/O.NEW.KCYS.HW.W.0013.250207T1400Z-250208T1200Z/
Ferris/Seminoe/Shirley Mountains-
Including the cities of Seminoe Dam
224 PM MST Thu Feb 6 2025

...HIGH WIND WARNING IN EFFECT FROM 7 AM FRIDAY TO 5 AM MST 
SATURDAY...

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

* WHERE...Ferris/Seminoe/Shirley Mountains.

* WHEN...From 7 AM Friday to 5 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ109-113-071200-
/O.UPG.KCYS.HW.A.0013.250207T1500Z-250208T1200Z/
/O.NEW.KCYS.HW.W.0013.250207T1400Z-250208T0300Z/
Central Carbon County-Upper North Platte River Basin-
Including the cities of Saratoga, Rawlins, and Encampment
224 PM MST Thu Feb 6 2025

...HIGH WIND WARNING IN EFFECT FROM 7 AM TO 8 PM MST FRIDAY...

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

* WHERE...Central Carbon County and Upper North Platte River Basin.

* WHEN...From 7 AM to 8 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.

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 stronger can lead to property damage.

&&

$$

WYZ110-071200-
/O.UPG.KCYS.HW.A.0013.250207T1500Z-250208T1500Z/
/O.NEW.KCYS.HW.W.0013.250207T1400Z-250208T1400Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
224 PM MST Thu Feb 6 2025

...HIGH WIND WARNING IN EFFECT FROM 7 AM FRIDAY TO 7 AM MST 
SATURDAY...

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

* WHERE...North Snowy Range Foothills including Arlington and Elk 
  Mountain along Interstate 80.

* WHEN...From 7 AM Friday to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ106-071200-
/O.UPG.KCYS.HW.A.0013.250207T1800Z-250208T1200Z/
/O.NEW.KCYS.HW.W.0013.250207T1600Z-250208T1400Z/
Central Laramie Range and Southwest Platte County-
Including the cities of Bordeaux
224 PM MST Thu Feb 6 2025

...HIGH WIND WARNING IN EFFECT FROM 9 AM FRIDAY TO 7 AM MST 
SATURDAY...

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

* WHERE...Bordeaux area along Interstate 25 between Chugwater and 
  Wheatland.

* WHEN...From 9 AM Friday to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ107-071200-
/O.EXB.KCYS.HW.A.0013.250207T1600Z-250208T0700Z/
East Platte County-
Including the cities of Wheatland and Guernsey
224 PM MST Thu Feb 6 2025

...HIGH WIND WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY 
EVENING...

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

* WHERE...East Platte County.

* WHEN...From Friday morning through Friday evening.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Watch means there is the potential for a hazardous high 
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58 
MPH or stronger may occur. Continue to monitor the latest forecasts.

&&

$$

WYZ118-071200-
/O.EXB.KCYS.HW.A.0013.250208T0000Z-250208T1400Z/
Central Laramie County-
Including the cities of Cheyenne
224 PM MST Thu Feb 6 2025

...HIGH WIND WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY 
MORNING...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph possible.

* WHERE...Central Laramie County.

* WHEN...From Friday afternoon through Saturday morning.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Watch means there is the potential for a hazardous high 
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58 
MPH or stronger may occur. Continue to monitor the latest forecasts.

&&

$$

WYZ116-117-071200-
/O.EXT.KCYS.HW.A.0013.250207T1500Z-250208T1500Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Buford, Federal, Vedauwoo, Horse Creek,
Whitaker, and Pumpkin Vine
224 PM MST Thu Feb 6 2025

...HIGH WIND WATCH NOW IN EFFECT FROM FRIDAY MORNING THROUGH 
SATURDAY MORNING...

* WHAT...Southwest winds 25 to 35 mph with gusts up to 60 mph 
  possible.

* WHERE...South Laramie Range and Foothills including the Interstate 
  80 Summit between Cheyenne and Laramie.

* WHEN...From Friday morning through Saturday morning.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Watch means there is the potential for a hazardous high 
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58 
MPH or stronger may occur. Continue to monitor the latest forecasts.

&&

$$

MN

909 
WWUS75 KCYS 071004
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
304 AM MST Fri Feb 7 2025

WYZ116-117-080000-
/O.UPG.KCYS.HW.A.0013.250207T1500Z-250208T1500Z/
/O.EXB.KCYS.HW.W.0013.250207T1500Z-250208T1500Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Horse Creek, Federal, Vedauwoo, Whitaker,
Pumpkin Vine, and Buford
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING IN EFFECT FROM 8 AM THIS MORNING TO 8 AM MST 
SATURDAY...

* WHAT...West-southwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...South Laramie Range and Foothills including the Interstate 
  80 Summit between Cheyenne and Laramie.

* WHEN...From 8 AM this morning to 8 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ118-080000-
/O.UPG.KCYS.HW.A.0013.250208T0000Z-250208T1400Z/
/O.EXB.KCYS.HW.W.0013.250208T0000Z-250208T1400Z/
Central Laramie County-
Including the cities of Cheyenne
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 7 AM MST 
SATURDAY...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected.

* WHERE...Central Laramie County.

* WHEN...From 5 PM this afternoon to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ104-080000-
/O.CON.KCYS.HW.W.0013.250207T1400Z-250208T1200Z/
Ferris/Seminoe/Shirley Mountains-
Including the cities of Seminoe Dam
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 5 
AM MST SATURDAY...

* WHAT...West-southwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Ferris/Seminoe/Shirley Mountains.

* WHEN...From 7 AM this morning to 5 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ109-113-080000-
/O.CON.KCYS.HW.W.0013.250207T1400Z-250208T0300Z/
Central Carbon County-Upper North Platte River Basin-
Including the cities of Encampment, Saratoga, and Rawlins
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 8 
PM MST THIS EVENING...

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

* WHERE...Central Carbon County and Upper North Platte River Basin.

* WHEN...From 7 AM this morning to 8 PM MST this evening.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ110-080000-
/O.CON.KCYS.HW.W.0013.250207T1400Z-250208T1400Z/
North Snowy Range Foothills-
Including the cities of Elk Mountain and Arlington
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 
AM MST SATURDAY...

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

* WHERE...North Snowy Range Foothills including Arlington and Elk 
  Mountain along Interstate 80.

* WHEN...From 7 AM this morning to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ106-080000-
/O.CON.KCYS.HW.W.0013.250207T1600Z-250208T1400Z/
Central Laramie Range and Southwest Platte County-
Including the cities of Bordeaux
304 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 7 
AM MST SATURDAY...

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

* WHERE...Bordeaux area along Interstate 25 between Chugwater and 
  Wheatland.

* WHEN...From 9 AM this morning to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ107-080000-
/O.CON.KCYS.HW.A.0013.250207T1600Z-250208T0700Z/
East Platte County-
Including the cities of Wheatland and Guernsey
304 AM MST Fri Feb 7 2025

...HIGH WIND WATCH REMAINS IN EFFECT FROM 9 AM MST THIS MORNING 
THROUGH THIS EVENING...

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

* WHERE...East Platte County.

* WHEN...From 9 AM MST this morning through this evening.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Watch means there is the potential for a hazardous high 
wind event. Sustained wind speeds of at least 40 MPH or gusts of 58 
MPH or stronger may occur. Continue to monitor the latest forecasts.

&&

$$

CG

304 
WWUS75 KCYS 071735
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
1035 AM MST Fri Feb 7 2025

WYZ107-080000-
/O.UPG.KCYS.HW.A.0013.000000T0000Z-250208T0700Z/
/O.EXB.KCYS.HW.W.0013.000000T0000Z-250208T0700Z/
East Platte County-
Including the cities of Wheatland and Guernsey
1035 AM MST Fri Feb 7 2025

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

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

* WHERE...East Platte County.

* 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.

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 stronger can lead to property damage.

&&

$$

WYZ104-080000-
/O.CON.KCYS.HW.W.0013.000000T0000Z-250208T1200Z/
Ferris/Seminoe/Shirley Mountains-
Including the cities of Seminoe Dam
1035 AM MST Fri Feb 7 2025

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

* WHAT...West-southwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Ferris/Seminoe/Shirley Mountains.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ106-080000-
/O.CON.KCYS.HW.W.0013.000000T0000Z-250208T1400Z/
Central Laramie Range and Southwest Platte County-
Including the cities of Bordeaux
1035 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 AM MST SATURDAY...

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

* WHERE...Bordeaux area along Interstate 25 between Chugwater and 
  Wheatland.

* WHEN...Until 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ109-113-080000-
/O.CON.KCYS.HW.W.0013.000000T0000Z-250208T0300Z/
Central Carbon County-Upper North Platte River Basin-
Including the cities of Encampment, Rawlins, and Saratoga
1035 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING...

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

* WHERE...Central Carbon County and Upper North Platte River Basin.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ110-080000-
/O.CON.KCYS.HW.W.0013.000000T0000Z-250208T1400Z/
North Snowy Range Foothills-
Including the cities of Elk Mountain and Arlington
1035 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 AM MST SATURDAY...

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

* WHERE...North Snowy Range Foothills including Arlington and Elk 
  Mountain along Interstate 80.

* WHEN...Until 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ116-117-080000-
/O.CON.KCYS.HW.W.0013.000000T0000Z-250208T1500Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Whitaker, Federal, Horse Creek, Pumpkin
Vine, Buford, and Vedauwoo
1035 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 8 AM MST SATURDAY...

* WHAT...West-southwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...South Laramie Range and Foothills including the Interstate 
  80 Summit between Cheyenne and Laramie.

* WHEN...Until 8 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

WYZ118-080000-
/O.CON.KCYS.HW.W.0013.250208T0000Z-250208T1400Z/
Central Laramie County-
Including the cities of Cheyenne
1035 AM MST Fri Feb 7 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 7 
AM MST SATURDAY...

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

* WHERE...Central Laramie County.

* WHEN...From 5 PM this afternoon to 7 AM MST Saturday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers.

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 stronger can lead to property damage.

&&

$$

MN

Area Forecast Discussion
National Weather Service Cheyenne WY
944 PM MST Wed Feb 5 2025

.UPDATE...
Issued at 936 PM MST Wed Feb 5 2025

Updated forecast for the rest of tonight and allowed the High
Wind Warning to expire for most zones in southeast Wyoming.
Arctic front is starting to rapidly dig south across the plains,
currently located near Wheatland and extending east into the
southern Nebraska Panhandle. The cold air push is a bit colder
than the previous forecast(s) have shown, so lowered min
temperatures tonight in the lower teens north of the North
Platte River valley. Current models now show the cold air
remaining in place across east central Wyoming and the far
northern Nebraska panhandle on Thursday, so may need to
reevaluate max temperatures Thursday afternoon for the Lusk and
Chadron areas.

.KEY MESSAGES...

- High Wind Warnings are in effect for much of southeast Wyoming
  this morning through the evening hours.

- Cold front expected on Thursday, leading to decreasing winds
  and cooler temperatures.

- A chance of rain and snow will start the weekend, with cold
  air behind this returning the region to near to below average
  temperatures to start next week.

&&

&&

.SHORT TERM /THROUGH FRIDAY/...
Issued at 245 PM MST Wed Feb 5 2025

Latest upper air analysis depicts the broad upper level ridging
beginning to move eastward, with the next Pacific system forming
across the Pacific Northwest. Another breezy day across the CWA,
with widespread strong winds observed across southeast Wyoming.
Latest High Wind Warnings have performed well, with max wind speeds
throughout the morning and early afternoon hours reported 75 mph
across the I-25 corridor near KBRX and a 70 mph wind gust reported
along the I-80 corridor near Halleck Ridge. As a result, High Wind
Warnings remain in effect through 5pm today, outside northern Carbon
county, Converse county, and the Summit where High Wind Warnings
remain in effect through the evening hours. All in all, timing on
current warnings looks good with local in-house model guidance
probabilities of reaching warning criteria decreasing after 00z
today for the I-25 corridor. Only uncertainty will remain with
Arlington, with the latest in-house model guidance keeping winds
fairly elevated through 09z tonight as the progressive Pacific
System skids eastward across the Canadian border. As a result,
strong pressure gradients are possible across our I-80 corridor and
increasing the wind speeds for Arlington. Main uncertainty is if the
winds will be able to mix down to the surface or stay aloft,
resulting in more of a LLWS setup. Will hold off on any headline
extention till observations can determine if warnings need to be
extended into the evening hours.

After the wind threat today, focus on the short term forecast
will slightly shift to the ongoing wind threats early tomorrow
morning and again on Friday afternoon, combined with increased
precipitation chances tomorrow evening. Looking into the wind
threats first, latest GFS has begun to advertise a decent low
level jet setting up from KBRX in southeast Wyoming to KAIA in
the Nebraska Panhandle beginning 12z through 18z tomorrow. Still
a bit skeptical of this setup, with local in- house model
guidance dropping probabilities to near zero for high winds in
KBRX and not a lot of model agreement with the NBM v4.2. Friday
appears the better setup, with the probabilities quite a bit
higher with in-house model guidance having upwards to 70%
likelihood of strong winds across our wind prones along the I-80
corridors and much better agreement with the NBM 4.2
probabilities of exceeding 41 knots. Will still hold off on any
additional headlines until the current headlines expire. But
will be worth monitoring through the next couple of forecast
cycles to issue additional wind headlines. In addition,
precipitation chances continue to rise, with a good atmospheric
river signal beginning to take shape in the short to medium
range models, has PWATs climb to around 1.9 sigma above
climatology.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Issued at 245 PM MST Wed Feb 5 2025

Over the weekend and into next week, the area can expect a
transition out of the warm and windy pattern that has dominated the
last week or so as much colder air returns. On Friday evening,
pseudo-zonal will continue to dominate the synoptic pattern aloft as
a strong upper level low traverses eastward across the Western US.
This system will bring another round of wind and mountain snowfall,
although the lower elevation precipitation forecast is more
uncertain. Integrated water vapor transport values in the NAEFS mean
are near climatological maximums Friday night, but this is more due
to the wind speeds than the moisture. 500-mb and 200-mb winds both
look to be above the 99.5 percentile of climatology, with
precipitable water around the 90th percentile. The moisture flux
combined with fairly strong frontogenesis should produce a brief
period of moderate to heavy snowfall in the mountains and perhaps
adjacent valleys of Carbon County Friday evening and overnight.
However, dry air will move in quickly, mostly shutting off the
faucet by 12z Saturday. Meanwhile, the upper level low will support
lee cyclogenesis over central Wyoming Friday evening. The surface
low will get shunted south into east central Colorado quickly as a
strong cold front pushes through behind the system. Ensemble mean
700-mb winds are close to 50-knots over KCYS early Saturday morning,
with models also showing strong subsidence in the wake of the mid-
level trough axis. We will likely be looking at another period of
strong to high winds, at least in the wind prone areas (where
probabilities for high winds are generally 50 to 65%) and possibly
into the adjacent zones (with probabilities around 30 to 50% at this
time). The strong signal for subsidence will also work against any
potential for low-elevation precipitation, especially east of the
Laramie range where low-level winds will have a downslope component.
Frontogenesis along the 700-mb trough axis may be enough to produce
radar echoes and some light snowfall, but widespread accumulating
snow is looking less probable for the High Plains. Probabilities for
0.1" QPF are 10% or less in both the GEFS and ENS systems for areas
east of the Laramie Range and south of US-20. Expect highs back to
near to slightly below average values on Saturday with a much colder
airmass moving in behind the upper level low.

A secondary upper level shortwave is expected to follow behind on
Saturday night into Sunday. After the Friday night system, the mid-
level front will be left straddling along or just south of the WY/CO
border. As the next shortwave moves in Saturday evening, models
suggest the possibility for overrunning positive theta-e advection
to occur along this boundary. This may be just too far south to
bring renewed precipitation to our mountains, but about 60% of
ensemble members show light snow extending into the I-80 corridor
from Elk Mountain to Sidney and points southward. However, less than
10% show over 0.1" QPF once again. Isentropic lift and moisture
evaporate Sunday morning, leading to clearing skies progressively
through the day, while temperatures remain chilly.

As we head into the early part of next week, most models are showing
a strong arctic surface high pressure sliding down the eastern side
of the Rockies behind a series of upper level shortwave troughs
mainly staying to our north. Surface pressure above the
climatological 90th percentile creeps into our High Plains regions
by late Monday according to the ensemble mean. There is some
uncertainty in Monday's high temperatures relating to the timing of
the front, but most of the area should be 15+F colder than average
come Tuesday. A few rounds of light snowfall will be possible Monday
onwards, but the timing and intensity of each round remains highly
uncertain. The vast majority of ensemble members show at least some
light snow accumulation between Monday and Wednesday, but the timing
varies widely.

&&

.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 430 PM MST Wed Feb 5 2025

Strong westerly flow aloft will continue. Expect scattered
clouds near 15000 feet. Low level wind shear occurs at Laramie
and Alliance from 02Z to 15Z. Winds will gust to 38 knots at
Rawlins, to 35 knots at all other terminals until 02Z, then to
35 knots at Laramie, Cheyenne, Chadron, Alliance and Scottsbluff
after 15Z Thursday.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.

&&

UPDATE...TJT
SHORT TERM...MRD
LONG TERM...MN
AVIATION...RUBIN

Hazardous Weather Outlook
National Weather Service Cheyenne WY
248 PM MST Wed Feb 5 2025

NEZ002-003-019>021-054-055-095-096-WYZ101>119-062200-
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-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen 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-East Laramie County-
248 PM MST Wed Feb 5 2025

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

High Wind Warnings are in effect for much of southeast Wyoming
this morning through the evening hours.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Cold front expected on Thursday, leading to decreasing winds and
cooler temperatures. A chance of rain and snow will start the
weekend, with cold air behind this returning the region to near to
below average temperatures to start next week.

.Spotter information statement...

Spotter activation will not be needed.