260
FXUS65 KVEF 110454
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
954 PM PDT Mon Aug 10 2026

.KEY MESSAGES...

* Dangerous heat will continue today, with widespread Moderate to
  Major HeatRisk driven by well above normal temperatures and
  increased humidity.

* Daily afternoon to evening isolated thunderstorm chances will
  continue through the week, with the greatest chances over higher
  terrain and some storms spreading into adjacent valleys. Storm
  chances will increase in the mid week.

* The high pressure pushes east leading to cooling temperatures
  through the week.


&&

.DISCUSSION...Today through next weekend.

Today is expected to be the last day of Extreme Heat as the high
pressure responsible for the excessive temperatures shifts east.
Expect temperatures to peak above 100 degrees in the Owens Valley,
near 110 degrees for most of the Mojave Desert, and a few localized
areas reaching 115 around the hottest portions of the region. The
Extreme Heat Warning lasts through this evening. The one caveat is
the cloud cover over Clark and northern Mohave counties associated
with two separate MCVs that were generated over southern Arizona
last night. This may help to keep temperatures down a bit across
those areas.

Even though the high shifts east, we will continue to see plenty of
monsoonal moisture over the region for much of the the week. The
aforementioned MCVs are both rotating northward across Clark and
northern Mohave counties with storms forming along the northern and
western edges. This trend is expected to continue through the
afternoon as these MCVs move north. Storms may be more delayed in
the wake of these MCVs due to more subsidence, but with enough
afternoon heating we may up seeing storms develop later this
afternoon. A weak, cut off low will also help to push additional
moisture into the area Tuesday and Wednesday leading to good chances
for isolated to scattered storms each afternoon and evening through
the late week. Another pattern change will reduce storm chances into
the weekend, but doesn`t completely erase storms from the late-term
forecast with storms mainly confined to the eastern half of the CWA
by the weekend.

The mid-week moisture push and the exiting high pressure will lead
to widespread cooling. Heat risk will reduce through the week as
temperatures begin to reduce closer to average for this time of
year. Lows look to fall into the 70s and 80s while highs reduce
into the 90s to lower 100s.


&&

.AVIATION...For Harry Reid...For the 06Z Forecast
Package...A dry night with typical light wind patterns are expected
overnight. On Tuesday, south-southeast winds will develop late
morning and afternoon. Wind speeds over 10KT are likely, especially
after 20Z. Occasionally gusts over 15KT are possible with the winds
in the afternoon. Convection is expected to develop around the
terminals Tuesday afternoon. Low confidence if thunderstorms will
directly impact the terminals, will need to see how things develop,
with heavy rain, lightning, and CIGs to 8000ft possible with any
storms. Outflows are possible as well from distant storms.
Convection should wane after sunset though showers may linger
through 09Z. After an convective influences from the afternoon on
winds wanes Tuesday evening, typical overnight south winds under 8KT
are expected. VFR skies with CIGs around 15kft-20kft are expected
through the period.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...Any lingering showers
will end across the region. Additional showers and isolate
thunderstorms may shift into southern Mohave County after 09Z as
decay storms from southwest Arizona drift north. In addition to
showers, south sot Southeast winds over 10KT with occasional gusts
over 20KT are possible through the morning in the Colorado River
Valley. Winds will calm down by Tuesday morning. Elsewhere, typical
wind patterns are expected overnight into Tuesday. Convection will
develop again Tuesday afternoon across much of the region. Any
storms could produce lightning, heavy rain, sudden gusty winds, and
CIGs below 8000ft. The highest risk for thunderstorms and outflow
winds will be in California where KDAG and KBIH should see direct
impacts, with a lower risk at all other TAF sites. Outside of
convective influences, south to southwest winds around 10KT will
develop Tuesday afternoon. Winds and convection will diminish after
sunset Tuesday.

&&

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

&&

$$

DISCUSSION...Gorelow
AVIATION...Nickerson

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