787
FXUS65 KVEF 220854
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
154 AM PDT Mon Jun 22 2026

.KEY MESSAGES...

* Temperatures will continue to climb, with afternoon highs peaking
  Tuesday through Thursday.

* Slight chances of isolated showers and thunderstorms mid-to-late
  week as monsoonal moisture creeps northward.

* Dry and windy conditions return for the latter half of the week,
  returning elevated fire danger to the region.

&&

.DISCUSSION...Today through Sunday.

Breezy southwesterly winds will continue today between 10 and 20
mph, with greater speeds in the higher terrain. Otherwise, temperatures
will continue to rise, with the hottest temperatures of the week expected
Tuesday through Thursday (afternoon highs 6 to 8 degrees above-normal).
Forecast temperatures Wednesday and Thursday have decreased slightly,
resulting in primarily Moderate Heat Risk (Level 2 of 4) across our
forecast area.

Newest ensemble members show moisture increasing across the southern
half of the forecast area sooner than originally thought. The monsoonal
high will jog slightly eastward on Tuesday, with the assistance of an
embedded shortwave trough. This shortwave will be collocated with a
500mb vorticity maxima that will push through San Bernardino County
Tuesday late-afternoon and evening. As a result, there is a 30-40 percent
chance of showers and thunderstorms south of Interstate 40 in the late-
afternoon... shifting northward through San Bernardino, southern Inyo,
and Clark counties overnight into Wednesday morning. Moisture will continue
to surge northward on Wednesday, with over 1.00" of PWAT expected across
Clark, Mohave, southern Inyo, and San Bernardino counties. Instability
decreases on Wednesday and Thursday, which will largely isolate convection
to the higher terrain, where daytime heating and orographic lift will
assist with ascent. Very dry low levels will result in DCAPE between
1500 and 2500 J/kg, making dry lightning and gusty winds the primary
hazards from thunderstorms that develop. Moisture lingers across the
region through Thursday.

A closed area of low pressure will push into the Pacific Northwest on
Friday as its associated digging trough stretches southward along the
western CONUS. This will increase southwesterly winds across the forecast
area Friday and Saturday as it pushes the monsoonal moisture eastward.
With Independence Day activities increasing, people are highly discouraged
from participating in any recreation that produces sparks or flames
on Friday and Saturday, including using charcoal grills, lighting safe-
and-sane fireworks, driving over vegetation, and/or shooting target
practice, as there will be a higher likelihood of wildfire starts and
spreads.
&&


.AVIATION...For Harry Reid...For the 06Z Forecast Package...
South winds have settled in this evening and will continue through
the night at about 8KT. After a period of light and variable
winds early Monday morning, southeast winds should develop like
they have the past few days. These winds should be light at onset
but will increase late in the afternoon or early evening. Moderate
confidence of timing of the southeast winds increasing as well as
that gusts over 15KT will develop. Winds will subside sometime
after 03Z and become more south by 06Z at the latest. Temperatures
exceed 100F tomorrow 19Z through 04Z. VFR conditions will
continue and all wildfire smoke will remain north of the
terminals.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...West winds over 10KT
will continue through the night. Elsewhere, typical light wind
patterns are expected tonight. On Monday, expect similar wind
patterns to today with south to southeast winds developing in the
afternoon. Gusts up to 20KT are possible late in  the afternoon in
many locations. KDAG will continue to be west, increasing by 00Z
with gusts to 25KT. VFR conditions continue.
&&


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


$$

DISCUSSION...Soulat
AVIATION...Nickerson

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