169
FXUS65 KVEF 102045 CCA
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
126 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 humidites 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 18Z Forecast Package...Wind
directions follow typical daily directional patterns, favoring an
east to southeast direction with speeds under 10 knots. By the late
afternoon, winds veer to the southwest and increase to over 10
knots, weakening overnight. Mid and high clouds filter through the
area with little impact on aviation. Temperatures exceed 100 degrees
between 19Z and 04Z. Some isolated thunderstorms could impact the
Daggett corridor this afternoon.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Winds generally follow
typical daily directional patterns throughout the TAF period.
Southwesterly winds around 10 knots late this afternoon in the Las
Vegas Valley. At the same time, westerly winds at KDAG with gusts to
around 25 knots. Isolated showers and thunderstorms develop along
the eastern Sierra this afternoon, some of which may reach the KBIH
terminal and other locations in Owens Valley, potentially bringing
gusty and erratic winds. Some storms are also possible in southern
San Bernardino County, but should remain east of KDAG. Outside of
storms, VFR conditions prevail with cloud bases at or above 12kft.

&&

.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...Murdock
AVIATION...Gorelow

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