Red Flag Warning 22, NWS Cheyenne, WY

426 
WWUS85 KCYS 182347
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
447 PM MST Thu Dec 18 2025

...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA
PANHANDLE...

...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH
PLAINS...

NEZ437-WYZ430-431-191200-
/O.EXP.KCYS.FW.W.0021.000000T0000Z-251219T0000Z/
/O.CON.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/
Lodgepole Creek/Southern Nebraska Panhandle-
Laramie Foothills and High Plains-Laramie East High Plains-
447 PM MST Thu Dec 18 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 11 PM MST
FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
430, 431, AND 437...

...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR
GUSTY WINDS AND LOW Humidity FOR FIRE WEATHER ZONES 430, 431, AND
437...


The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 11 PM MST Friday.

* AFFECTED AREA...Fire weather zones 430, 431 and 437.

* WIND...For today - Gusts 40 to 60 mph. For tomorrow - Gusts 
  50 to 70 mph. 

* HUMIDITY...RH values of 15 to 20%.

* IMPACTS...Any fires that develop will likely spread rapidly.
  Outdoor burning is not recommended. Although conditions will be
  borderline, a lack of significant precipitation combined with
  the high winds in the region will create a critical fire weather
  environment. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

NEZ434>436-WYZ417-418-432-433-191200-
/O.CON.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
447 PM MST Thu Dec 18 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 11 PM MST
FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
417, 418, 432, 433, 434, 435, AND 436...

* AFFECTED AREA...Fire weather zones 434, 435, 417, 418.

* WIND...Gusts 40 to 60 mph.

* HUMIDITY...RH values 15 to 30%.

* IMPACTS...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended. Although conditions will 
  be borderline, a lack of significant precipitation combined 
  with the high winds in the region will create a critical fire 
  weather environment. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

668 
WWUS85 KCYS 190912
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
212 AM MST Fri Dec 19 2025

...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE...

NEZ434>437-WYZ417-418-430>433-200000-
/O.CON.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Laramie Foothills and High Plains-Laramie East High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
212 AM MST Fri Dec 19 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
11 PM MST THIS EVENING FOR LOW RH, STRONG GUSTING WINDS, AND DRY
FUELS FOR FIRE WEATHER ZONES 417, 418, 430, 431, 432, 433, 434, 
435, 436, AND 437...

* AFFECTED AREA...Fire weather zones 417, 418, 430, 431, 432, 433,
  434, 435, 436, and 437.

* WIND...Gusts 50 to 70 mph.

* HUMIDITY...RH values 15 to 30%.

* IMPACTS...Any fires that develop will likely spread rapidly.
  Outdoor burning is not recommended. Although conditions will be
  borderline in some zones, a lack of significant precipitation 
  combined with the very high winds in the region will create a 
  critical fire weather environment.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

034 
WWUS85 KCYS 191046
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
346 AM MST Fri Dec 19 2025

...A PARTICULARLY DANGEROUS SITUATION FOR THE FOOTHILLS OF AND
IMMEDIATELY ADJACENT OF THE SOUTHERN LARAMIE RANGE THROUGH LARAMIE
COUNTY IS EXPECTED ON FRIDAY...

A strong wind event is ongoing and expected to continue to
strengthen through much of today alongside rising temperatures 
and dry conditions including humidity values into the teens. With 
sustained winds of 40 to 55 mph and gusts of 60 to 75+ mph 
expected alongside these dry conditions, an extreme environment 
conducive of significant and rapid wildfire spread will be present.
The most likely time for stronger winds and lowered relative
humidity values will lie just after sunrise through the late 
afternoon and early evening hours, with the potential for lowered 
relative humidity values lingering beyond sunset due to the 
expected dry flow across the region. This environment will be most
likely for elevations below 8000 feet along the southern Laramie 
Range and eastwards through most of Laramie County.


WYZ429-200015-
/O.EXB.KCYS.FW.W.0022.251219T1200Z-251220T0700Z/
Southern Laramie Range-
346 AM MST Fri Dec 19 2025

...RED FLAG WARNING IN EFFECT FROM 5 AM THIS MORNING TO MIDNIGHT 
MST TONIGHT FOR LOW RH, STRONG WINDS, AND DRY FUELS FOR FIRE 
WEATHER ZONE 429...

* THIS IS A PARTICULARLY DANGEROUS SITUATION FOR THE FOOTHILLS AND
  MID ELEVATIONS OF THE SOUTHERN LARAMIE RANGE.

* AFFECTED AREA...Fire weather zone 429.

* WIND...Sustained winds 40 to 55 mph. Gusts in excess of 60 to 
  75 mph.

* HUMIDITY...RH values 15 to 25%.

* IMPACTS...Conditions will be favorable for very rapid fire
  spread. Avoid outdoor burning and any activity that may produce
  a spark and start a wildfire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a Particularly Dangerous Situation that poses a significant
threat to life and property in the event of a wildfire start. 
Residents are urged to assemble an emergency supply kit and know 
their evacuation routes. In some cases, safe and timely evacuation
may not be possible should a fire approach. Have multiple ways to
receive instructions from emergency services, and evacuate if 
ordered to or if a fire threatens.

&&

$$

NEZ434>437-WYZ417-418-432-433-200015-
/O.EXT.KCYS.FW.W.0022.251219T1500Z-251220T0700Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
346 AM MST Fri Dec 19 2025

...RED FLAG WARNING NOW IN EFFECT FROM 8 AM THIS MORNING TO
MIDNIGHT MST TONIGHT FOR LOW RH, STRONG WINDS, AND DRY FUELS FOR 
FIRE WEATHER ZONES 417, 418, 432, 433, 434, 435, 436, AND 437...

* AFFECTED AREA...Fire weather zones 417, 418, 432, 433, 434, 435,
  436, and 437. 

* WIND...Sustained winds 30 to 50 mph. Gusts in excess of 55 to 
  70 mph.

* HUMIDITY...RH values 15 to 30%.

* IMPACTS...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended. Although conditions will 
  be borderline in some zones, a lack of significant 
  precipitation combined with the very high winds in the region 
  will create a critical fire weather environment.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

WYZ430-431-200015-
/O.EXT.KCYS.FW.W.0022.251219T1200Z-251220T0700Z/
Laramie Foothills and High Plains-Laramie East High Plains-
346 AM MST Fri Dec 19 2025

...RED FLAG WARNING NOW IN EFFECT FROM 5 AM THIS MORNING TO MIDNIGHT
MST TONIGHT FOR LOW RH, STRONG WINDS, AND DRY FUELS FOR FIRE 
WEATHER ZONES 430 AND 431...

* THIS IS A PARTICULARLY DANGEROUS SITUATION FOR LARAMIE COUNTY
  AND THE SOUTHERN LARAMIE RANGE FOOTHILLS.

* AFFECTED AREA...Fire weather zones 430 and 431.

* WIND...Sustained winds 40 to 55 mph. Gusts in excess of 60 to 
  75 mph.

* HUMIDITY...RH values 15 to 25%.

* IMPACTS...Conditions will be favorable for very rapid fire
  spread. Avoid outdoor burning and any activity that may produce
  a spark and start a wildfire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a Particularly Dangerous Situation that poses a significant
threat to life and property in the event of a wildfire start. 
Residents are urged to assemble an emergency supply kit and know 
their evacuation routes. In some cases, safe and timely evacuation
may not be possible should a fire approach. Have multiple ways to
receive instructions from emergency services, and evacuate if 
ordered to or if a fire threatens.

&&

$$

192 
WWUS85 KCYS 192045
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
145 PM MST Fri Dec 19 2025

...A PARTICULARLY DANGEROUS SITUATION FOR THE FOOTHILLS OF AND
IMMEDIATELY ADJACENT OF THE SOUTHERN LARAMIE RANGE THROUGH
LARAMIE COUNTY IS EXPECTED ON FRIDAY...

A strong wind event is ongoing, sustained winds of 40 to 55 mph 
and gusts of 60 to 75+ mph, alongside dry conditions and low
humidity is creating an extreme environment conducive of 
significant and rapid wildfire spread. These conditions will
continue into the early evening hours before improving later
tonight. These conditions will remain for elevations below 8000 
feet along the southern Laramie Range and eastwards through most 
of Laramie County.

NEZ434>437-WYZ417-418-432-433-200700-
/O.CON.KCYS.FW.W.0022.000000T0000Z-251220T0700Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
145 PM MST Fri Dec 19 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT
FOR LOW RH, STRONG WINDS, AND DRY FUELS FOR FIRE WEATHER ZONES
417, 418, 432, 433, 434, 435, 436, AND 437...

* AFFECTED AREA...Fire weather zones 417, 418, 432, 433, 434, 
  435, 436, and 437. 

* WIND...Sustained winds 30 to 50 mph with gusts in excess of 55 
  to 70 mph.

* HUMIDITY...RH values as low as 15 to 30%.

* IMPACTS...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended. Although conditions will 
  be borderline in some zones, a lack of significant 
  precipitation combined with the very high winds in the region 
  will create a critical fire weather environment.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

WYZ429>431-200700-
/O.CON.KCYS.FW.W.0022.000000T0000Z-251220T0700Z/
Southern Laramie Range-Laramie Foothills and High Plains-
Laramie East High Plains-
145 PM MST Fri Dec 19 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT
FOR LOW RH, STRONG WINDS, AND DRY FUELS FOR FIRE WEATHER ZONE
429...

* THIS IS A PARTICULARLY DANGEROUS SITUATION FOR THE FOOTHILLS 
  AND MID ELEVATIONS OF THE SOUTHERN LARAMIE RANGE. 

* AFFECTED AREA...Fire weather zone 429.

* WIND...Sustained winds 40 to 55 mph with gusts in excess of 60 
  to 75 mph.

* HUMIDITY...RH values as low as 15 to 25%.

* IMPACTS...Conditions will be favorable for very rapid fire 
  spread. Avoid outdoor burning and any activity that may 
  produce a spark and start a wildfire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a Particularly Dangerous Situation that poses a
significant threat to life and property in the event of a
wildfire start. Residents are urged to assemble an emergency
supply kit and know their evacuation routes. In some cases, safe
and timely evacuation may not be possible should a fire approach.
Have multiple ways to receive instructions from emergency
services, and evacuate if ordered to or if a fire threatens.

&&

$$

885 
WWUS85 KCYS 200640
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
1140 PM MST Fri Dec 19 2025

NEZ434>437-WYZ417-418-432-433-200745-
/O.EXP.KCYS.FW.W.0022.000000T0000Z-251220T0700Z/
Pine Ridge/Nebraska National Forest-
Box Butte/South Sioux/Niobrara River-
Lower North Platte River Basin/Scottsbluff National Monument-
Lodgepole Creek/Southern Nebraska Panhandle-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
Middle North Platte River Basin/Niobrara and Converse High Plains-
Bordeaux/Chugwater/Wheatland-Goshen/Middle-
Lower North Platte River Basin-
1140 PM MST Fri Dec 19 2025

...RED FLAG WARNING WILL EXPIRE AT MIDNIGHT MST TONIGHT FOR LOW
RH, STRONG WINDS, AND DRY FUELS FOR FIRE WEATHER ZONES 417, 418, 
432, 433, 434, 435, 436, AND 437...

While gusty winds will persist through the nighttime hours, RH
values are on the rise and will continue to increase as the cold
front comes through and moisture moves into the region. Therefore
the Red Flag Warning will be allowed to expire.

$$

WYZ429>431-200745-
/O.EXP.KCYS.FW.W.0022.000000T0000Z-251220T0700Z/
Southern Laramie Range-Laramie Foothills and High Plains-
Laramie East High Plains-
1140 PM MST Fri Dec 19 2025

...RED FLAG WARNING WILL EXPIRE AT MIDNIGHT MST TONIGHT FOR LOW
RH, STRONG WINDS, AND DRY FUELS FOR FIRE WEATHER ZONES 429, 430, AND
431...

While gusty winds will persist through the nighttime hours, RH
values are on the rise and will continue to increase as the cold
front comes through and moisture moves into the region. Therefore
the Red Flag Warning will be allowed to expire.

$$

Area Forecast Discussion
National Weather Service Cheyenne WY
449 AM MST Thu Dec 18 2025

.KEY MESSAGES...

- Widespread strong to locally damaging winds will continue
  through the late morning hours across much of the CWA.

- A lack of significant moisture combined with strong winds and
  near critical relative humidities has prompted a Red Flag
  Warning for Thursday, and a Fire Weather Watch for Friday.

- Another significant wind event is expected Thursday night into
  Friday, possibly lingering into early Saturday. Wind gusts
  possibly exceeding 90 mph are expected once again along
  portions of the I-25 corridor with widespread 60 to 80 mph
  gusts elsewhere.

&&

.SHORT TERM /THROUGH FRIDAY/...
Issued at 305 AM MST Thu Dec 18 2025

The forecast just doesn't get any easier as we continue with the
ongoing high wind products across the region, with further wind
concerns as we move through the day and into Friday. Through the
late morning hours strong winds should persist across most of
the eastern half of the CWA alongside our usual windy location
of the Arlington area. In fact, this location was our winner of
yesterday with a pair of verified wind gusts over 100 MPH! By
the late morning hours most locations should see conditions back
below high wind criteria, but this will be a brief respite at
best.

Accompanying these winds through the morning and afternoon
hours will be a critical environment for fire weather
conditions. While the overall conditions won't reach our usual
criteria for red flag conditions (winds gusts 25+ mph, RH values
15% or less), yesterday proved that very high winds and modest
RH values alongside how dry the grasses across the high plains
are is more than enough to create a critical environment.
Working with our neighbors to the south, we have issued a Red
Flag Warning valid starting at 5 AM this morning and continuing
through the afternoon hours. Any new fires that do start will
spread rapidly.

This evening starts the next round of high winds for the CWA and
will continue through late Friday into Saturday morning. At the
upper levels, a Pacific trough moving inland will tighten the
pressure gradient and bring a stout jet over the CWA yet again.
Moving further down, at 700mb the jet will once again intensify
with speeds of 90-95+ knots noted on the GFS, and then at the
surface Craig to Casper pressure gradients once again in excess
of 85-90 meters. Of note, the previous discussion mentioned the
inversion at the 650-600mb level being a little higher which
might prevent some of the mountain wave breaking we had seen
yesterday, but latest analysis of some of the high resolution
guidance indicates we may actually see that a little lower near
675 or even 700 mb, which would put us in a similar position for
the excessive wind speeds we just saw. In either case, a
similar event of widespread gusts 60-80 mph is expected for the
CWA, with localized gusts 80-90+ mph expected for our wind prone
locations. High wind watches beginning this evening and
continuing through Saturday morning have been issued, and as of
this writing the plan is to begin upgrading those possibly as
early as later this morning.

Once again we are facing another round of critical fire weather
conditions on Friday as well, and yet again in tandem with our
neighboring office to the south, have issued Fire Weather
Watches, this time for a much larger portion of our high plains
areas in Wyoming and Nebraska. Portions of this watch may even
reach our standard threshold for a Red Flag Warning, but in any
case the danger of very high winds alongside low RH values and a
lack of notable moisture will fuel further fire weather danger
for the area.

Finally, behind the cold front today, temperatures will be
closer to what we would expect for December, with highs in the
30's to 40's after widespread sub-freezing lows this morning.
But with the ridge getting a quick resurgence on Friday, expect
those winter-like temperatures to quickly spike back into the
50's to 60's (which will also fuel our dry conditions as RH
values drop in response). Overnight into Saturday morning the
next front will approach and move across the region with
precipitation chances accompanying it. While some light to
occasionally moderate rain, possibly with snow mixing in or
transitioning over to, will be possible, not seeing the signal
for the stronger bands that produced snow squalls yesterday. For
now, holding off on messaging this, but we'll likely see several
inches of snow in the mountains with a possible advisory needed,
with the lower elevations getting a small hit of moisture, but
likely missing much of the region east of I-25.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Issued at 430 PM MST Wed Dec 17 2025

A broad ridge will be the dominate pattern for the
long term. Friday night into Saturday, An Alberta clipper will move
across the US/Canada border compressing the pressure gradient
against our broad ridge. This in turn will sustain our 700mb jet
into the 60 to 70kts range. Concurrently the global model omega
fields are still showing maxed out downward omegas indicative of
another high wind event continuing through the overnight period. Our
in house algorithm also agrees as it gives a 75 to 80 percent prob
of achieving a high wind criteria. The high wind forecast gets a
little tricky through the weekend as there is a little bit of timing
disagreement with the arrival of the next wave between the global
models. To add to the uncertainty, the ensemble cluster analysis
depicted about equal chances for the GFS solution of a more
progressive system limiting the lull in high winds Saturday into
Sunday, and the Euro delayed solution that has the wave arriving
about late Sunday night into Monday morning. Behind this wave the
700mb jet looks to be around 55 to 60kts which would be enough to
achieve high criteria. So depending on the timing of this wave we
could see a lull in high winds Saturday afternoon through Sunday
morning. The global omega fields have some downward motion but the
700mb jet isn't portrayed as having sustained winds of 55kts or
higher during that time. But to add some confidence in the lull in
high winds. Our in-house algorithm shows higher confidence with 40
to 60 percent probs of elevated winds as opposed to winds that meet
the high wind criteria. After the open wave moves through the winds
on the backside look currently more elevated with the 700mb jet
being between 40-55kts. So the winds look to remain gusty through
the start of the work week at the very least. Temperatures on the
other hand look to remain in the high 50's to low 60's throughout
the long term as this ridge is forecasted to remain anchored over
the West half of the United States. Overnight temperatures will drop
into the high twenties Saturday night making it the coldest night as
the rest of the forecasted temperatures look to be in the 30's
possibly 40's through Christmas day.

&&

.AVIATION /12Z TAFS THROUGH 12Z FRIDAY/...
Issued at 446 AM MST Thu Dec 18 2025

VFR conditions expected over the next 24 hours. Winds remain the
primary hazard as widespread gusts of 30-50 knots persist into
this evening for WY terminals, while NE terminals should see a
break from winds during the afternoon and evening as winds calm
down to around 12-15 knots or less. Winds resume gusting for
all terminals by tomorrow morning though, with gusts 25-50 knots
by the end of the TAF period, alongside low level wind shear.
CIGs expected to be around mid to high levels at FEW to SCT.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...High Wind Warning until 11 AM MST this morning for WYZ102-
     106>108-110-116>119.
     Fire Weather Watch from Friday morning through Friday evening
     for WYZ430>433.
     Red Flag Warning until 5 PM MST this afternoon for WYZ430-431.
     High Wind Watch from this evening through late Friday night
     for WYZ101-107-118.
     High Wind Watch from late tonight through Friday evening for
     WYZ102-108-119.
     High Wind Watch from this evening through late Friday night
     for WYZ103-105-106-109-113-115-117.
     High Wind Watch from this afternoon through Saturday morning
     for WYZ104-110-116.
NE...High Wind Warning until 11 AM MST this morning for NEZ002-003-
     019>021-054-055-095-096.
     Fire Weather Watch from Friday morning through Friday evening
     for NEZ436-437.
     High Wind Watch from Friday morning through Friday evening for
     NEZ019-020-054-095-096.
     Red Flag Warning until 5 PM MST this afternoon for NEZ437.

&&

UPDATE...MN
SHORT TERM...CG
LONG TERM...MM
AVIATION...CG

Hazardous Weather Outlook
National Weather Service Cheyenne WY
419 AM MST Thu Dec 18 2025

NEZ002-003-019>021-054-055-095-096-WYZ101>119-191130-
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-
419 AM MST Thu Dec 18 2025

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

.DAY ONE...TODAY AND TONIGHT

- High Wind Warnings will continue through the morning hours for
  eastern portions of the CWA with High Wind Watches once again
  for much of the region this evening through Friday and into
  Saturday.

- Red Flag Warnings have been issued for southeastern portions of
  the high plains today due to strong winds and low RH values, and
  while we may not reach critical conditions, dry grasses plus
  strong winds should fuel rapid fire spread.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

- High winds expected Friday into Saturday, with High Wind Watches
  in place alongside a Fire Weather Watch for low RH's
  accompanying the high winds.

- Breezy conditions expected beyond Saturday, but currently not
  showing as widespread of high and as strong of winds for the
  CWA.

.Spotter information statement...

Spotter activation will not be needed.

Preliminary Local Storm Report
National Weather Service Cheyenne WY
523 AM MST Thu Dec 18 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 AM     Non-Tstm Wnd Gst 7 E Laramie             41.31N 105.45W
12/18/2025  M67 MPH          Albany             WY   Mesonet

            Mesonet station PC236 Pilot Hill.

0336 AM     Non-Tstm Wnd Gst 3 W Van Tassell         42.67N 104.16W
12/18/2025  M58 MPH          Niobrara           WY   Mesonet

            Mesonet station WY60 3.4 W Van Tassell
            (WYDOT).

0336 AM     Non-Tstm Wnd Gst 8 S Sibley Peak         42.32N 105.05W
12/18/2025  M61 MPH          Platte             WY   Mesonet

            Mesonet station WY1 8.4 S Sibley Peak
            (WYDOT).

0340 AM     Non-Tstm Wnd Gst 8 NW Harrison           42.78N 103.99W
12/18/2025  M60 MPH          Sioux              NE   Mesonet

            Mesonet station FW9543 Harrison.

0352 AM     Non-Tstm Wnd Gst Vedauwoo                41.16N 105.40W
12/18/2025  M62 MPH          Albany             WY   Mesonet

            Mesonet station KVDW Vedauwoo (WYDOT).

0352 AM     Non-Tstm Wnd Gst 5 W Chadron             42.83N 103.10W
12/18/2025  M64 MPH          Dawes              NE   ASOS

            ASOS station KCDR Chadron Airport - Cdr.

0402 AM     Non-Tstm Wnd Gst 5 W Chadron             42.83N 103.10W
12/18/2025  M71 MPH          Dawes              NE   ASOS

            ASOS station KCDR Chadron Airport - Cdr.

0436 AM     Non-Tstm Wnd Gst 8 S Sibley Peak         42.32N 105.05W
12/18/2025  M60 MPH          Platte             WY   Mesonet

            Mesonet station WY1 8.4 S Sibley Peak
            (WYDOT).

0456 AM     Non-Tstm Wnd Gst 3 W Van Tassell         42.67N 104.16W
12/18/2025  M72 MPH          Niobrara           WY   Mesonet

            Mesonet station WY60 3.4 W Van Tassell
            (WYDOT).

&&