Wind Advisory 43, NWS Las Vegas, NV

626 
WWUS75 KVEF 140107
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
507 PM PST Fri Dec 13 2019

CAZ519-520-140215-
/O.EXP.KVEF.WI.Y.0042.000000T0000Z-191214T0100Z/
Eastern Sierra Slopes-Owens Valley-
Including Aspendell, Whitney Portal, Bishop, Independence, 
Lone Pine, and Olancha
507 PM PST Fri Dec 13 2019

...WIND ADVISORY HAS EXPIRED...

Advisory level winds are no longer expected.

$$

CAZ523-524-141315-
/O.CON.KVEF.WI.Y.0043.191214T1800Z-191215T0600Z/
Western Mojave Desert-Eastern Mojave Desert-
Including Barstow, Daggett, Fort Irwin, Baker, Mountain Pass, 
and Mitchell Caverns
507 PM PST Fri Dec 13 2019

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM TO 10 PM PST
SATURDAY...

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph 
  expected.

* WHERE...Western Mojave Desert and Eastern Mojave Desert.

* WHEN...From 10 AM to 10 PM PST Saturday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

808 
WWUS75 KVEF 141301
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
501 AM PST Sat Dec 14 2019

CAZ523-524-141815-
/O.CON.KVEF.WI.Y.0043.191214T1800Z-191215T0600Z/
Western Mojave Desert-Eastern Mojave Desert-
Including Barstow, Daggett, Fort Irwin, Baker, Mountain Pass, 
and Mitchell Caverns
501 AM PST Sat Dec 14 2019

...WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
10 PM PST THIS EVENING...

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph 
  expected.

* WHERE...Western Mojave Desert and Eastern Mojave Desert.

* WHEN...From 10 AM to 10 PM PST Saturday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

502 
WWUS75 KVEF 141800
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
1000 AM PST Sat Dec 14 2019

CAZ523-524-150600-
/O.CON.KVEF.WI.Y.0043.000000T0000Z-191215T0600Z/
Western Mojave Desert-Eastern Mojave Desert-
Including Barstow, Daggett, Fort Irwin, Baker, Mountain Pass, 
and Mitchell Caverns
1000 AM PST Sat Dec 14 2019

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph 
  expected.

* WHERE...Western Mojave Desert and Eastern Mojave Desert of San
  Bernardino County.

* WHEN...until 10 PM PST this evening.

* IMPACTS...Winds will make driving difficult for
  motorcycles...large trucks...trailers and campers on north-south
  oriented roads such as Highway 395 and sections of I-15. Gusty 
  winds could blow around unsecured objects. Tree limbs could be 
  blown down and a few power outages may result. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

542 
WWUS75 KVEF 150546
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
946 PM PST Sat Dec 14 2019

CAZ525-151400-
/O.EXB.KVEF.WI.Y.0043.000000T0000Z-191215T1400Z/
Morongo Basin-
Including Morongo Valley, Yucca Valley, and Twentynine Palms
946 PM PST Sat Dec 14 2019

...WIND ADVISORY IN EFFECT UNTIL 6 AM PST SUNDAY...

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph 
  expected.

* WHERE...Morongo Basin.

* WHEN...Until 6 AM PST Sunday.

* IMPACTS...Winds will make driving difficult for motorcycles...
  large trucks...trailers and campers. Gusty winds could blow 
  around unsecured objects. Tree limbs could be blown down and a 
  few power outages may result.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

CAZ523-524-151400-
/O.EXT.KVEF.WI.Y.0043.000000T0000Z-191215T1400Z/
Western Mojave Desert-Eastern Mojave Desert-
Including Barstow, Daggett, Fort Irwin, Baker, Mountain Pass, 
and Mitchell Caverns
946 PM PST Sat Dec 14 2019

...WIND ADVISORY NOW IN EFFECT UNTIL 6 AM PST SUNDAY...

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph 
  expected.

* WHERE...Western Mojave Desert and Eastern Mojave Desert of San 
  Bernardino County.

* WHEN...Until 6 AM PST Sunday.

* IMPACTS...Winds will make driving difficult for motorcycles...
  large trucks...trailers and campers. Locallized areas of reduced
  visibility are possible due to dust and sand blowing across
  roads and highways. Gusty winds could blow around unsecured 
  objects. Tree limbs could be blown down and a few power outages 
  may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

321 
WWUS75 KVEF 151341
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
541 AM PST Sun Dec 15 2019

CAZ523>525-151445-
/O.EXP.KVEF.WI.Y.0043.000000T0000Z-191215T1400Z/
Western Mojave Desert-Eastern Mojave Desert-Morongo Basin-
Including Barstow, Daggett, Fort Irwin, Baker, Mountain Pass, 
Mitchell Caverns, Morongo Valley, Yucca Valley, 
and Twentynine Palms
541 AM PST Sun Dec 15 2019

...WIND ADVISORY WILL EXPIRE AT 6 AM PST EARLY THIS MORNING...

Winds across the Western Mojave Desert of San Bernardino County
will start to gradually subside from now through 8 am this
morning. A more substantial reduction in wind speeds will occur
by late morning. 

$$

For more information from the National Weather Service visit
https://weather.gov/lasvegas

Area Forecast Discussion
National Weather Service Las Vegas NV
940 AM PST Fri Dec 13 2019

.SYNOPSIS...Pacific systems will bring high clouds, gusty winds,
and precipitation chances to portions of the region through the
end of the week. Cooler and drier conditions expected for next
week.
&&

.UPDATE...As noted by the previous shift we are looking at the
potential for strong downslope winds this afternoon and early
evening over the eastern Sierra slopes and western portions of the
Owens Valley. The strongest winds will likely occur between 2-6pm
this evening with winds potentially reaching 60 mph over the far
western portions of the Owens Valley. Did go ahead and issued a Wind
Advisory which will replace the High Wind Watch. Winds will
gradually diminish early evening as precipitation begins to
spillover the crest. No other updates needed at this time.
&&

PREV DISCUSSION
310 AM PST Fri Dec 13 2019

.SHORT TERM...through Saturday night.

The short term concerns continue to evolve. The immediate concerns
for today include downslope wind potential in the eastern Sierra
and Owens Valley, transitioning to spillover precipitation this
evening. Wind concerns shift to the western Mojave Desert for
Saturday with precipitation sinking south across the southern
Great Basin Saturday through Sunday morning.

The short term pattern starts shortwave trough energy off the
Pacific Northwest coast, with zonal flow beneath a branch of the
jet stream across the region. This pattern is a relatively close
match for longer duration/extreme downslope events for the eastern
Sierra Nevada and Owens Valley, and indeed, quite a few high
resolution models indicate this potential this afternoon and
evening. Synoptic-scale models prog an inversion between 600 mb
and 500 mb (just above ridge top for the Sierra), with vertical
wind shear generally under the 1.6x rule through the layer. Given
the pattern match, synoptic ingredients, and high-resolution
support, went with a high wind watch for downslope potential, as
there looks to be a window this afternoon and evening for the
downslope machine to get cranking. As spillover increases this
evening, downslope potential should rapidly wane - probably just
after 00Z.

As the base of the upper-level trough cuts inland to central
Nevada on Saturday, winds coming around the southern Sierra and
Tehachipis will result in a breezy day for the western Mojave
Desert (Barstow), with the more focused area of showers working
south from central Nevada in the day, through southern Nevada and
northwest Arizona later in the evening and overnight. Not
expecting a whole lot of precipitation - with traces or a few
hundredths at best for Las Vegas and marginally higher amounts
north and east.

.LONG TERM...Sunday through Thursday.
The long term period starts with high confidence with a ridge of
high pressure building in behind the disturbance(s) of the short
term. By midweek, model consensus erodes quite a bit. While decent
agreement exists in bringing a pacific system across the region
later in the week, significant timing and to a lesser extent,
strength differences exist. The GFS family is the quickest of the
camps, bringing the trough ashore on Wednesday, leaving the region
in it's wake by Friday, with the ECMWF almost 24 hours slower. In
any case, more unsettled weather is expected by the middle to late
week next week.

&&

.AVIATION...For McCarran...Light, diurnal winds will continue
through this evening. Skies will start out mostly clear this morning
but look for clouds at and above 12 kft increasing late this
afternoon and tonight. No operational impacts are expected.

For the rest of southern Nevada, northwest Arizona and southeast
California...Light winds will continue across the region this
morning. During the afternoon, a few locations - KBIH,KDAG - will
see increasing winds in response to a passing weather disturbance.
Locally strong west winds are possible below canyon openings along
the eastern Sierra Slopes late this afternoon and evening. Those
downslope winds will subside some tonight while westerly winds
increase across the western Mojave Desert of San Bernardino County.
Lower cigs along with rain/snow showers will obscure the southern
Sierra and White Mountains tonight.

&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&

SHORT/LONG TERM..Steele
AVIATION.........Pierce

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