High Wind Warning 25, NWS Cheyenne, WY

931 
WWUS75 KCYS 262046
NPWCYS

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
246 PM MDT Sun May 26 2024

WYZ110-262200-
/O.EXP.KCYS.HW.W.0025.000000T0000Z-240526T2100Z/
North Snowy Range Foothills-
Including the cities of Arlington and Elk Mountain
246 PM MDT Sun May 26 2024

...HIGH WIND WARNING WILL EXPIRE AT 3 PM MDT THIS AFTERNOON...

Wind gusts have dropped below warning levels. Winds could still gust 
between 40 to 45 mph.

$$

WYZ116-262300-
/O.EXT.KCYS.HW.W.0025.000000T0000Z-240526T2300Z/
South Laramie Range-
Including the cities of Pumpkin Vine, Vedauwoo, and Buford
246 PM MDT Sun May 26 2024

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MDT THIS AFTERNOON...

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

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

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

* 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.

&&

$$

WYZ117-262300-
/O.EXT.KCYS.HW.W.0025.000000T0000Z-240526T2300Z/
South Laramie Range Foothills-
Including the cities of Federal, Horse Creek, and Whitaker
246 PM MDT Sun May 26 2024

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MDT THIS AFTERNOON...

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

* WHERE...South Laramie Range Foothills.

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

* 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.

&&

$$

Woodward

Area Forecast Discussion
National Weather Service Cheyenne WY
934 PM MDT Sat May 25 2024

.KEY MESSAGES...

- Mountain snow showers will accumulate in the Snowy and Sierra
  Madre tonight and early Sunday, with total possible
  accumulations of 2 to 6 inches above elevations of 9500 feet.
  Scattered rain showers and an isolated strong to potentially
  severe thunderstorm can't be ruled out east of the Laramie
  Range and Nebraska Panhandle today.

- Strong winds are possible in the wind prone and gap areas of
  southeast Wyoming early Sunday morning through the mid-
  afternoon. Please see the latest High Wind Watch Statement
  for further details.

- A much warmer, milder week ahead as an upper-level ridge
  overtakes the region.

&&

.SHORT TERM /THROUGH SUNDAY NIGHT/...
Issued at 150 PM MDT Sat May 25 2024

Radar analysis shows a band of showers with a few embedded
thunderstorm cores stretching from Cheyenne to Scottsbluff with
this whole area moving off to the northeast. A few isolated
thunderstorm cores are trying to organize but with the limited
instability available, they are remaining on the weaker side.
Still could see pea sized hail out of those cores but outside of
that, impacts a limited. Temperatures have cooled off where rain
has been observed dropping much of SE Wyoming down into the 50s.
With the passing shortwave aloft, we can expect additional
development of showers for the lower elevations through the rest
of the afternoon. Heading into the overnight hours we will see
the development of that high elevation mountain snow. Some of
the highest peaks over the Sierra Madre and Snowy's could see
5-7" of snow.

This shortwave will move to the east of the Front Range by
tomorrow morning allow for some subsidence to advect in its
wake. Coinciding with this subsidence will be a band of 50kt
700mb winds arriving with the next shortwave trough moving west
to east through Wyoming. In-house model guidance continues to
show high probabilities for high winds primarily for the
Arlington wind prone area. The setup does favor areas along the
south Laramie Range Foothills and Summit to see some periods of
high winds as well. The current High Wind Watch seems
appropriates it captures the current forecast trends.

With a more potent shortwave trough passing aloft and some
residual low level moisture in place across SE Wyoming and the
Nebraska Panhandle, we could see more showers and thunderstorms
develop Sunday afternoon. These storms will encounter a better
environment as daytime heating and limited cloud over should
allow for some destabilization to occur with the best corridor
of CAPE values being shown across the northern Nebraska
Panhandle. A few strong storms will be possible and we can't
rule out a storm or two becoming severe.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
Issued at 150 PM MDT Sat May 25 2024

Few changes made to the long term forecast, with Memorial Day still
looking dry for those with outdoor plans. Likely a bit breezy across
the area as a shortwave passes to our northeast, but temperatures
will be average for late May with afternoon highs in the upper 60s
and 70s.

Headed into the remainder of the work week, an upper-level ridge
will build over the Rockies Tuesday into Wednesday, sandwiched
between two troughs. This will lead to warmer, above average
temperatures during this time frame as 700 mb temperatures climb
into the +10C to +14C range. By Wednesday, highs will be in the
upper 70s and low 80s. Ridging will lead to dry conditions on
Tuesday, but an embedded disturbance moving through the ridge on
Wednesday could spark some afternoon and evening convection. Per GFS
soundings for Wednesday afternoon, there is the potential for severe
storms. Soundings from across the Nebraska panhandle do show surface
CAPE values approaching 2000 J/kg. MUCAPE values are also
approaching 2000 J/kg which will primarily lead to a large hail
threat. Aside from hail, will also have to keep an eye on PWs as
these soundings are encroaching on 1 inch PWs. Cloud layer winds are
also on the slower side which could lead to the potential for minor
flooding.

After Wednesday, daily precipitation chances look possible through
the end of the work week. Although the GFS and ECMWF diverge by
Thursday and Friday, both still have afternoon thunderstorm chances.
The biggest difference between the two is temperature. The GFS sends
a trough north of the CWA, while the ECMWF dives the trough further
south with a strong cold front moving across the CWA. If the ECMWF
solution comes true, expect much cooler, below average temperatures
headed into the start of the weekend.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 929 PM MDT Sat May 25 2024

A weather disturbance aloft will move to the east of the
terminals overnight, with northwest flow aloft developing on
Sunday.

Wyoming TAFS...Scattered to broken clouds from 6000 to
10000 feet will prevail until 00Z, then skies will be clear.
Winds will gust to 38 knots from 15Z to 00Z.

Nebraska TAFS...Scattered to broken clouds from 8000 to
10000 feet will prevail until 00Z, then skies will be clear.
Thunderstorms will be in the vicinity of Chadron and Alliance
from 20Z to 01Z. Winds will gust to 30 knots at Scottsbluff and
Sidney from 15Z to 00Z.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...High Wind Watch from 3 AM MDT Sunday through Sunday afternoon
     for WYZ106-110-116-117.
NE...None.

&&

SHORT TERM...AW
LONG TERM...SF
AVIATION...RUBIN

Hazardous Weather Outlook
National Weather Service Cheyenne WY
433 AM MDT Sat May 25 2024

NEZ002-003-019>021-054-055-095-096-WYZ101>105-107>109-111-113-115-
118-119-261045-
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-East Platte County-Goshen County-
Central Carbon County-Southwest Carbon County-
Upper North Platte River Basin-Laramie Valley-
Central Laramie County-East Laramie County-
433 AM MDT Sat May 25 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

Scattered rain showers and an isolated strong thunderstorm are
possible through this evening. Weather hazards in the strongest of
any thunderstorm that develops are wind gusts in excess of 50mph
and hail up the size of one inch in diameter.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Elevated wind gusts of 35-45mph are possible on Sunday.

A gradual warming trend is anticipated for the upcoming week.
Above average temperatures are forecast with many areas seeing
high temperatures near or above 80 degrees by the end of the
week.

.Spotter information statement...

Weather reports are welcome from weather spotters regarding
precipitation, wind gusts, or hail that is observed today and
tonight.

WYZ112-114-261045-
Sierra Madre Range-Snowy Range-
433 AM MDT Sat May 25 2024

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

.DAY ONE...TODAY AND TONIGHT

Scattered rain and snow showers will become present today and
tonight. Light snowfall accumulations above 9500 feet are
expected. Total snowfall accumulations by early Sunday may exceed
two inches above elevations of 9500 feet.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Strong wind gusts above 50mph are possible on Sunday morning
through the afternoon hours.

A warming trend is expected to begin next week, leading to
increased snowmelt for the higher elevations where snow cover
remains present.

.Spotter information statement...

Reports are welcomed by weather spotters regarding any snowfall
amounts from today through tomorrow in the higher elevations, as
well as wind gust observations to NWS Cheyenne via social media.

WYZ106-110-116-117-261045-
Central Laramie Range and Southwest Platte County-
North Snowy Range Foothills-South Laramie Range-
South Laramie Range Foothills-
433 AM MDT Sat May 25 2024

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

.DAY ONE...TODAY AND TONIGHT

Scattered rain showers and isolated thunderstorms are expected
today. Wind gusts up to 50mph may be possible.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Strong wind gusts in excess of 55-60mph will be possible from
Sunday morning through the afternoon hours as a weather
disturbance moves through the region.

.Spotter information statement...

Weather reports are welcome from weather spotters regarding
precipitation, wind gusts, or hail that is observed today and
tonight.

BW