392
FXUS65 KVEF 110455
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
955 PM PDT Thu Sep 10 2026

.KEY MESSAGES...

*  The warming trend peaks Today with an Extreme Heat Warning in
   effect. Temperatures cool into and through the weekend.

*  Spotty storm activity will be possible in the Sierra Nevada and
   higher elevations of eastern San Bernardino today.

*  Breezy south-southwesterly wind gusts expected across the
   region Friday through the weekend. With reduced humidities
   leading to fire weather concerns.

&&

.DISCUSSION...Through Wednesday

Temperatures and HeatRisk peak today as afternoon highs look to
peak around 5 degrees above average with most of the desert
valleys ranging from the upper 90s to around 105 degrees. Areas to
the south of Lake Havasu will exceed 110 and around Death Valley
looks to climb above 115 degrees. As such, an Extreme Heat Warning
is in affect until tonight for Death Valley, the Las Vegas
Valley, Pahrump Valley, Moapa Valley, Colorado River Valley,
southern Mohave County, and southeastern San Bernardino County.
The overnight hours will offer some relief, but lows will still
range 5 to 10 degrees above average. The upper level pattern
begins to push a trough into the area from the Northwest, pushing
the high pressure east, and allowing for a cooling trend starting
Friday.

Weak convection has moved through southern portions of the CWA
earlier in the day with spotty shower activity moving through
Sierra Nevada near Bishop this after. So far, these showers have
been on the weaker side with some brief lightning activity, but
don`t look to be impactful.

The late week pattern change will increase the pressure gradient
from the high pressure to the east to the building trough to the
northwest and result in increasing winds. Friday afternoon will
offer breezy to gusty winds that look to ease slightly overnight.
Winds look to become even stronger for  Saturday with widespread
gusts above 30 mph possible and above 40 mph possible in higher
terrain and favored gaps and passes. This coupled with very dry
conditions has increase fire weather concerns, with a Fire Weather
Watch in effect for Nye, Esmeralda, and portions of Lincoln and
Clark counties for Saturday. Winds look to reduce for Sunday but
remain breezy. Longer term models are starting to favor breezy
winds peaking around 25 mph each afternoon into the first half
of next week.

&&

.AVIATION...For Harry Reid...For the 06Z Forecast Package...Winds
will follow typical directional patterns overnight, and after a
period of variability through the morning, winds will shift to the
south and southwest by early afternoon. Wind speeds will increase
to 10-15KT with gusts to 20-25KT thereafter through the end of
the forecast period. VFR conditions will prevail with passing
bands of mid-level and high clouds with bases at or above 15kft.
Temperatures will exceed 100 degrees between 19Z-02Z, reaching a
high of 106 degrees Friday afternoon.


For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...Winds through Friday
morning will remain around 5-10KT and follow typical directional
patterns. Thereafter through the afternoon and evening, winds
shift to the south and southwest, increasing to 10-15KT with gusts
to around 25KT. Exceptions to this include KBIH in the northern
Owens Valley, where down-valley winds will persist through mid- to
late afternoon before shifting to the west with gusts to 20-25KT
through sunset, and KDAG/the western Mojave Desert where winds
remain westerly through the forecast period with gusts to 20-25KT
through late afternoon, increasing to 30-35KT thereafter through
the evening. Otherwise, VFR conditions will prevail, with passing
bands of clouds with bases at or above 12kft. Isolated
thunderstorms are expected during the afternoon over portions of
Mohave and Lincoln Counties, though direct impacts at area
terminals are not anticipated.

&&

.FIRE WEATHER...A Fire Weather Watch is in effect from 11AM Saturday
through midnight that night for Nye, Esmeralda, and portions of
Lincoln and Clark counties. Concerns include RH ranging from 5 to
15% while winds begin to build above 25 mph and gusts approaching 40
mph. Winds will last deeper into that night, but humidities will
begin to have some recovery by the late that night.

&&

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

&&

$$

DISCUSSION/FIRE WEATHER...Murdock
AVIATION...Phillipson

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