High Wind Warning 23, NWS Cheyenne, WY

146 
WWUS75 KCYS 060838
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
238 AM MDT Mon May 6 2024

NEZ003-021-055-095-096-060945-
/O.CAN.KCYS.HW.W.0022.000000T0000Z-240506T1200Z/
Box Butte County-Morrill County-Cheyenne County-Northern Sioux
County-Southern Sioux County-
Including the cities of Bridgeport, Sidney, Angora, Redington,
Alliance, Hemingford, Agate, Bayard, Brownson, and Harrison
238 AM MDT Mon May 6 2024

...HIGH WIND WARNING IS CANCELLED...

Winds across much of the Nebraska panhandle have been gusting 35 to 
45 mph overnight, but have begun to decrease and will continue to do 
so early this morning. Therefore, the High Wind Warning has been 
cancelled for Sioux, Box Butte, Morrill, and Cheyenne Counties.

$$

WYZ101-102-060945-
/O.CAN.KCYS.HW.A.0023.240506T1400Z-240508T0000Z/
Converse County Lower Elevations-Niobrara County-
Including the cities of Douglas, Lusk, Deer Creek, Redbird,
Glenrock, and Bill
238 AM MDT Mon May 6 2024

...HIGH WIND WATCH IS CANCELLED...

An extended period of high winds are no longer expected. Therefore, 
the High Wind Watch has been cancelled. Wind gusts around 55 mph 
could still be possible along Interstate 25 near Douglas around 
midday Monday.

$$

NEZ019-020-054-062300-
/O.EXT.KCYS.HW.W.0022.000000T0000Z-240507T1200Z/
Scotts Bluff County-Banner County-Kimball County-
Including the cities of Gering, Scottsbluff, Kimball, and
Harrisburg
238 AM MDT Mon May 6 2024

...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 AM MDT TUESDAY...

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

* WHERE...Banner, Kimball, and Scotts Bluff County in the Nebraska 
  panhandle.

* WHEN...Until 6 AM MDT Tuesday.

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

* ADDITIONAL DETAILS...Expect a brief lull in winds this morning 
  before strengthening again later today into tonight.

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.

&&

$$

NEZ002-061200-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240506T1200Z/
Dawes County-
Including the cities of Chadron St Park and Chadron
238 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT EARLY THIS 
MORNING...

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

* WHERE...Dawes County including Chadron and areas along the Pine 
  Ridge.

* WHEN...Until 6 AM MDT early this 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 Warning means that hazardous winds in excess of 58 mph 
are occurring or are expected to occur shortly. Sustained wind 
speeds of at least 40 MPH or gusts of 58 MPH or stronger may occur. 
Continue to monitor the latest forecasts.

&&

$$

WYZ106-110-116-062300-
/O.CON.KCYS.HW.W.0022.240506T1000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Buford, Arlington, Elk Mountain, Pumpkin
Vine, Vedauwoo, and Bordeaux
238 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

* WHAT...West winds 35 to 50 mph with gusts of 70 to 80 mph expected.

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

* ADDITIONAL DETAILS...Strongest winds are expected Monday with 
  elevated to strong winds lingering through Wednesday.

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.

Fasten loose objects or shelter objects in a safe location prior to 
the onset of winds.

&&

$$

WYZ103>105-107>109-115-117>119-062300-
/O.CON.KCYS.HW.W.0023.240506T1400Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Laramie, Wheatland, Whitaker, Medicine
Bow, Cheyenne, Garrett, Torrington, Horse Creek, Bosler, Federal,
Shirley Basin, Pine Bluffs, Rawlins, Guernsey, and Seminoe Dam
238 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 9 
PM MDT TUESDAY...

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

* WHERE...Much of southeast Wyoming including Cheyenne, Laramie, 
  Wheatland, Rawlins, and Torrington. This also includes Interstate 
  25 from Cheyenne to Glendo.

* WHEN...From 8 AM this morning to 9 PM MDT Tuesday.

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

* ADDITIONAL DETAILS...Strongest winds are expected Monday with 
  elevated to strong winds lingering through Tuesday.

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.

&&

$$

Brothers

058 
WWUS75 KCYS 061158
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
558 AM MDT Mon May 6 2024

NEZ002-061300-
/O.EXP.KCYS.HW.W.0022.000000T0000Z-240506T1200Z/
Dawes County-
Including the cities of Chadron St Park and Chadron
558 AM MDT Mon May 6 2024

...HIGH WIND WARNING WILL EXPIRE AT 6 AM MDT EARLY THIS MORNING...

Winds have diminished below warning thresholds. However, wind gusts 
up to 50 mph will be possible early this morning.

$$

NEZ019-020-054-070000-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240507T1200Z/
Scotts Bluff County-Banner County-Kimball County-
Including the cities of Gering, Scottsbluff, Kimball, and
Harrisburg
558 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT TUESDAY...

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

* WHERE...Banner, Kimball, and Scotts Bluff County in the Nebraska 
  panhandle.

* WHEN...Until 6 AM MDT Tuesday.

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

* ADDITIONAL DETAILS...Expect a brief lull in winds this morning 
  before strengthening again later today into tonight.

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.

&&

$$

WYZ106-110-116-070000-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Buford, Arlington, Elk Mountain, Pumpkin
Vine, Vedauwoo, and Bordeaux
558 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

* WHAT...West winds 35 to 50 mph with gusts of 70 to 80 mph expected.

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

* ADDITIONAL DETAILS...Strongest winds are expected Monday with 
  elevated to strong winds lingering through Wednesday.

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.

Fasten loose objects or shelter objects in a safe location prior to 
the onset of winds.

&&

$$

WYZ103>105-107>109-115-117>119-070000-
/O.CON.KCYS.HW.W.0023.240506T1400Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Laramie, Wheatland, Whitaker, Medicine
Bow, Cheyenne, Garrett, Torrington, Horse Creek, Bosler, Federal,
Shirley Basin, Pine Bluffs, Rawlins, Guernsey, and Seminoe Dam
558 AM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY...

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

* WHERE...Much of southeast Wyoming including Cheyenne, Laramie, 
  Wheatland, Rawlins, and Torrington. This also includes Interstate 
  25 from Cheyenne to Glendo.

* WHEN...Until 9 PM MDT Tuesday.

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

* ADDITIONAL DETAILS...Strongest winds are expected Monday with 
  elevated to strong winds lingering through Tuesday.

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.

&&

$$

Brothers

532 
WWUS75 KCYS 062023
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
223 PM MDT Mon May 6 2024

NEZ019-020-054-071200-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240507T1200Z/
Scotts Bluff County-Banner County-Kimball County-
Including the cities of Gering, Kimball, Harrisburg, and
Scottsbluff
223 PM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT TUESDAY...

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

* WHERE...Banner, Kimball, and Scotts Bluff County in the Nebraska 
  panhandle.

* WHEN...Until 6 AM MDT Tuesday.

* 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.

&&

$$

WYZ103>105-107>109-115-117>119-071200-
/O.CON.KCYS.HW.W.0023.000000T0000Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Whitaker, Bosler, Cheyenne, Torrington,
Shirley Basin, Seminoe Dam, Guernsey, Garrett, Medicine Bow,
Wheatland, Rawlins, Laramie, Horse Creek, Pine Bluffs, and
Federal
223 PM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY...

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

* WHERE...Much of southeast Wyoming including Cheyenne, Laramie, 
  Wheatland, Rawlins, and Torrington. This also includes Interstate 
  25 from Cheyenne to Glendo.

* WHEN...Until 9 PM MDT Tuesday.

* 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.

&&

$$

WYZ106-110-116-071200-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Arlington, Buford, Vedauwoo, Bordeaux,
Pumpkin Vine, and Elk Mountain
223 PM MDT Mon May 6 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

* WHAT...West winds 35 to 50 mph with gusts of 70 to 80 mph expected.

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

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.

&&

$$

Claycomb

931 
WWUS75 KCYS 071148
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
548 AM MDT Tue May 7 2024

NEZ019-020-054-071300-
/O.EXP.KCYS.HW.W.0022.000000T0000Z-240507T1200Z/
Scotts Bluff County-Banner County-Kimball County-
Including the cities of Gering, Scottsbluff, Kimball, and
Harrisburg
548 AM MDT Tue May 7 2024

...HIGH WIND WARNING WILL EXPIRE AT 6 AM MDT EARLY THIS MORNING...

Winds have diminished below warning thresholds. Therefore, the High 
Wind Warning will be allowed to expire. Wind gusts around 45 mph 
will be possible today.

$$

WYZ103>105-107>109-115-117>119-080000-
/O.CON.KCYS.HW.W.0023.000000T0000Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Rawlins, Garrett, Torrington, Pine
Bluffs, Cheyenne, Bosler, Medicine Bow, Guernsey, Federal, Horse
Creek, Shirley Basin, Seminoe Dam, Wheatland, Whitaker, and
Laramie
548 AM MDT Tue May 7 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...

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

* WHERE...Much of southeast Wyoming including Cheyenne, Laramie, 
  Wheatland, Rawlins, and Torrington. This also includes Interstate 
  25 from Cheyenne to Glendo.

* WHEN...Until 9 PM MDT 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.

&&

$$

WYZ106-110-116-080000-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Vedauwoo, Bordeaux, Arlington, Elk
Mountain, Buford, and Pumpkin Vine
548 AM MDT Tue May 7 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

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

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

* ADDITIONAL DETAILS...Strongest winds expected over the wind-prone 
  locations Tuesday evening.

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.

&&

$$

Brothers

021 
WWUS75 KCYS 071945
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
145 PM MDT Tue May 7 2024

WYZ103>105-107>109-115-117>119-080300-
/O.CON.KCYS.HW.W.0023.000000T0000Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Laramie, Guernsey, Shirley Basin,
Whitaker, Horse Creek, Wheatland, Seminoe Dam, Rawlins, Federal,
Garrett, Pine Bluffs, Torrington, Bosler, Cheyenne, and Medicine
Bow
145 PM MDT Tue May 7 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...

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

* WHERE...Much of southeast Wyoming including Cheyenne, Laramie, 
  Wheatland, Rawlins, and Torrington. This also includes Interstate 
  25 from Cheyenne to Glendo.

* WHEN...Until 9 PM MDT 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.

&&

$$

WYZ106-110-116-080345-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Buford, Bordeaux, Elk Mountain, Vedauwoo,
Pumpkin Vine, and Arlington
145 PM MDT Tue May 7 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

* WHAT...West winds 35 to 50 mph with gusts of 70 to 80 mph expected.

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

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.

&&

$$

Claycomb

472 
WWUS75 KCYS 080234
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
834 PM MDT Tue May 7 2024

WYZ103>105-107>109-115-117>119-080345-
/O.EXP.KCYS.HW.W.0023.000000T0000Z-240508T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-Shirley
Basin-East Platte County-Goshen County-Central Carbon County-
Laramie Valley-South Laramie Range Foothills-Central Laramie
County-East Laramie County-
Including the cities of Laramie, Federal, Whitaker, Shirley
Basin, Torrington, Cheyenne, Pine Bluffs, Horse Creek, Garrett,
Bosler, Rawlins, Medicine Bow, Guernsey, Seminoe Dam, and
Wheatland
834 PM MDT Tue May 7 2024

...HIGH WIND WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING...

Strong winds have ended outside of the wind prone areas of southeast 
Wyoming. Therefore, will allow the High Wind Warning to expire on 
time. Occasional gusts up to 50 MPH are possible through noon 
Wednesday.

$$

WYZ106-110-116-081045-
/O.CON.KCYS.HW.W.0022.000000T0000Z-240509T0000Z/
Central Laramie Range and Southwest Platte County-North Snowy
Range Foothills-South Laramie Range-
Including the cities of Buford, Bordeaux, Vedauwoo, Arlington,
Pumpkin Vine, and Elk Mountain
834 PM MDT Tue May 7 2024

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT WEDNESDAY...

* WHAT...West winds 30 to 45 mph with gusts of 60 to 70 mph expected.

* WHERE...Southeast Wyoming wind-prone areas including Interstate 80 
  near Arlington and the Summit and Interstate 25 near Bordeaux.

* WHEN...Until 6 PM MDT Wednesday.

* IMPACTS...Mainly to transportation. Strong cross winds will be 
  hazardous to light weight or high profile vehicles, including 
  campers and tractor trailers. There will be a high risk for 
  vehicle blow overs, particularly along north to south oriented 
  roadways.

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.

&&

$$

Trudel

Area Forecast Discussion
National Weather Service Cheyenne WY
1139 AM MDT Sun May 5 2024

.KEY MESSAGES...

- Warmer today with strong southerly winds and the chance (~30%)
  for showers and thunderstorms to develop near the NE/WY
  border late this afternoon.

- Accumulating snowfall expected starting late tonight in the
  Sierra Madre and Snowy Ranges, specifically at elevations over
  8000 feet.

- Strong winds return to southeast Wyoming and western Nebraska
  Monday with a prolonged period of elevated winds continuing
  through midweek. Wind gusts of 70-80 mph are possible for
  wind-prone locations.

&&

.UPDATE...
Issued at 956 AM MDT Sun May 5 2024

Had to upgrade the Dawes County High Wind Watch early as Kings
Canyon RAWS reporting 63 mph currently. Looks like there may be
a lull in the winds up there this afternoon...but GFS 800/850mb
winds really show low level jet picking up again after 00Z. So
ran the warning through 06AM Monday.

&&

.SHORT TERM /THROUGH TUESDAY/...
Issued at 330 AM MDT Sun May 5 2024

Latest GOES WV imagery shows a large scale upper level low
churning across the NV/OR border and will continue to move
towards the Intermountain-West today. Strong southerly flow
ahead of this system will see moisture advection into the NE
panhandle with CAMs showing dew points in the mid-40s. With a
dryline setting up near the WY/NE border, will need to monitor
this afternoon for enhanced areas of convergence along with
increasing lift approaching from the west that could be
supportive of shower development late this afternoon. Could
even see a few thunderstorms develop with latest RAP soundings
analyzing a few hundred J/kg of MLCAPE present and strong enough
wind shear to support organized cells. Otherwise, expecting a
warm day across southeast WY and western Ne with afternoon highs
in the upper-60s to 70s.

As far as headlines go, went ahead with upgrading to a High Wind
Warning across much of western Carbon Co today with strong 50+ kt
southerly 700mb flow moving in aloft ahead of the large scale upper
level low. Steep low-level lapse rates will support vertical
momentum transport during the afternoon and early evening leading to
occasional gusts around 60 mph near Baggs, Rawlins, and Muddy Gap.
Stronger flow will continue to move east this evening with a frontal
passage bringing ample lift across areas west of the Laramie Range
early Monday morning. Higher elevations above 8000 feet could see
accumulating snowfall, mainly in the Sierra Madre and Snowy Ranges.
Went ahead with issuing a Winter Weather Advisory for the Sierra
Madres beginning late tonight as 6 to 12 inches of snowfall will be
possible by Monday afternoon. Farther east across the NE panhandle
Sunday night, a tight east-west mslp gradient develops ahead of
the lee troughing with the approaching system. This will help
setup a strong nocturnal LLJ over the NE panhandle with the
strongest winds likely across the Pine Ridge, possibly
downsloping into the Chadron area. Therefore, decided to add a
new High Wind Watch for Dawes Co for Sunday night.

Jumping ahead to Monday, strong winds still appear likely across
much of southeast WY, possibly expanding in the NE panhandle during
the afternoon in the wake of the strong negatively tilted upper
level low with a near 980mb surface low developing in western
SD. NAEFS continues to show climatological maximum 700mb winds
across much of southeast WY and continues to trend upward. This
is also highlighted by in-house random forest guidance with
probabilities of high winds climbing to over 90% with the 18z
and 00z model runs. Additionally, this ML guidance is now
suggesting 70-80 mph wind gusts will be possible for wind-prone
locations along Interstate 80 near Arlington and Interstate 25
near Bordeaux. Therefore, decided to issue High Wind Watches for
much of southeast WY beginning Monday morning. Strongest winds
look to occur midday Monday with the strongest flow aloft and
steep low-level lapse rates supporting vertical momentum
transport and this is also highlighted with the highest NBM
probabilities of exceeding 55 mph gusts on Monday vs Tuesday.
However, wind-prone locations will likely begin early Monday
morning with strong flow running underneath a mountain top
inversion per forecast soundings. Wind headlines very well may
need to be expanded to cover portions of the NE panhandle Monday
afternoon, but will continue to assess the latest model trends.
In addition to winds on Monday, precipitation will be most
likely across east-central WY and the northern NE panhandle,
closer to the surface low, however isolated showers could move
across areas farther south.

Chances for precipitation return to south-central WY, mainly
southern Carbon Co, Tuesday with lift associated with the secondary
vort max approaching from the northwest. Additionally, strong winds
look to continue for wind-prone locations, but uncertainty remains
with how widespread high winds will be across adjacent foothills and
plains throughout Tuesday. Upcoming forecast updates can look to
refine the High Wind Watch timing for various zones across the CWA,
specifically with the endtime.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
Issued at 330 AM MDT Sun May 5 2024

Tuesday night/Wednesday...Another shortwave trough aloft pivots
around the primary upper trough producing scattered showers for
our forecast area, with the least coverage across far southeast
Wyoming and the southern Nebraska panhandle due to downslope
winds. Continued windy due to low level pressure gradients and
winds, with 700 mb temperatures near -2 Celsius yielding high
temperatures from the upper 40s to upper 50s.

Thursday...Continued cool with 700 mb temperatures near -4 Celsius
yielding maximum temperatures from the upper 40s to upper 50s. Low
and mid level moisture looks plentiful enough for scattered to
numerous showers and isolated thunderstorms.

Friday...Although dynamics look rather limited, it appears there
will be enough low and mid level moisture for scattered showers and
isolated thunderstorms. 700 mb temperatures rise slightly from
Thursday, thus temperatures will be slightly warmer.

Saturday...The upper trough continues to spin across the Great Basin
states sending another shortwave trough aloft over our counties and
will combine with remaining low and mid level moisture to produce
isolated to widely scattered late day showers and thunderstorms.
Temperatures will show a warming trend as 700 mb temperatures rise
to near 4 Celsius, yielding maximum temperatures mostly in the
60s.

&&

.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 1138 AM MDT Sun May 5 2024

Main aviation concern will be prolonged strong, gusty winds. Strong
southerly winds with gusts to 50 kts at some terminals will be
possible during the day today ahead of an incoming cold front. The
cold front will begin to move through later this evening and
tonight. Precipitation will be possible with this front, which could
cause some visibility drops if snow mixes in. Low CIGs will also be
possible with the front, with low stratus creating MVFR conditions.
Tomorrow, winds will become more westerly behind the front, leading
to continued high winds across much of southeast Wyoming and
potentially in the Nebraska panhandle. Gusts over 50 kts will be
possible.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...High Wind Watch from Monday morning through Tuesday evening
     for WYZ101-103>105-107>109-115-117>119.
     High Wind Warning until 9 PM MDT this evening for WYZ104-109-
     111.
     High Wind Watch from late tonight through Wednesday morning
     for WYZ106-110-116.
     Winter Weather Advisory from 11 PM this evening to 6 PM MDT
     Monday for WYZ112.
NE...High Wind Warning until 6 AM MDT Monday for NEZ002.

&&

UPDATE...GCC
SHORT TERM...MB
LONG TERM...RUBIN
AVIATION...SF

Hazardous Weather Outlook
National Weather Service Cheyenne WY
422 AM MDT Sun May 5 2024

NEZ002-003-019>021-054-055-095-096-WYZ101>119-061030-
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-
422 AM MDT Sun May 5 2024

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

.DAY ONE...TODAY AND TONIGHT

Warmer today with strong southerly winds and the chance (~30%)
for showers and thunderstorms to develop near the NE/WY border
late this afternoon.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Accumulating snowfall expected starting late tonight continuing
into Monday in the Sierra Madre and Snowy Ranges, specifically at
elevations over 8000 feet.

Strong winds return to southeast Wyoming and western Nebraska
Monday with a prolonged period of elevated winds continuing
through midweek. Wind gusts of 70-80 mph are possible for wind-
prone locations.

.Spotter information statement...

Spotter activation will not be needed.

Preliminary Local Storm Report
National Weather Service Cheyenne WY
953 AM MDT Sun May 5 2024

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

0922 AM     Non-Tstm Wnd Gst 3 NNE Chadron State Par 42.72N 102.97W
05/05/2024  M63 MPH          Dawes              NE   Mesonet

            Mesonet station HRSN1 7 S Chadron - Kings
            Canyon Raws - Hrs.

&&

Preliminary Local Storm Report
National Weather Service Cheyenne WY
1032 AM MDT Sun May 5 2024

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

1022 AM     Non-Tstm Wnd Gst 7 S Chadron             42.73N 103.00W
05/05/2024  M60 MPH          Dawes              NE   Mesonet

            Kings Canyon RAWS site. Sustained winds 38
            mph.

&&

GCC

Preliminary Local Storm Report
National Weather Service Cheyenne WY
1138 AM MDT Sun May 5 2024

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

1122 AM     Non-Tstm Wnd Gst 3 NNE Chadron State Par 42.72N 102.97W
05/05/2024  M63 MPH          Dawes              NE   Mesonet

            Mesonet station HRSN1 7 S Chadron - Kings
            Canyon Raws - Hrs.

&&