528
FXUS65 KVEF 171014
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
314 AM PDT Mon Aug 17 2026

.KEY MESSAGES...

* Temperatures will peak on Wednesday and Thursday, with above-
  normal afternoon highs and near-record morning lows.

* Monsoon moisture increases late-week into the weekend, returning
  chances of showers and thunderstorms to the region.

&&

.DISCUSSION...Today through Sunday.

The region is drying out this week as a ridge of high pressure
builds over the Desert Southwest. That said, some moisture still
remains over the region today, so expect partly cloudy skies this
afternoon across the Mojave Desert and southern Great Basin. A few
of these clouds may (0 to 10 percent chance) build into light
showers, with a very slight (0 to 5 percent) chance of a lightning
strike. Otherwise, temperatures will peak on Wednesday and Thursday
as afternoon highs climb to 5 to 7 degrees above-normal and
overnight/morning lows approach daily records. Though these
afternoon temperatures are not incredibly impressive by August
standards, many locations will experience overnight lows in the
upper 80s to low 90s. This type of heat exhausts both people and
infrastructure that rely on sufficient overnight cooling.
Particularly vulnerable populations include those without
functioning air conditioning, those working outdoors, and those who
are unhoused. Moisture will return to the region late-week, which
will initially make the heat feel more oppressive before heights
fall and temperatures decrease over the weekend.

Late-week into the weekend, a Pacific trough will push the
aforementioned area of high pressure eastward, which will return the
funnel of monsoonal moisture from northern Mexico into the Desert
Southwest. The extent to which the high pressure pushes east will
impact timing and placement of precipitation chances, so stay tuned
to the forecast if you have weekend outdoor plans.
&&


.AVIATION...For Harry Reid...For the 06Z Forecast Package...Winds
will follow typical daily directional patterns with speeds of less
than 10 knots throughout the forecast period. FEW to SCT mid and
high clouds remain in the area with bases at or above 10kft.
Temperatures increase to 100 degrees or greater between 19Z Monday
morning and 04Z in the evening.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 06Z Forecast Package...Winds follow typical
daily directional patterns with speeds of less than 10 knots for
most terminals over the next 24 hours. Exceptions include KBIH where
gusty southeasterly winds pick up in the afternoon, and KDAG where
gusty westerly winds persist tonight and return tomorrow evening.
FEW to SCT mid and high clouds remain in the area, with bases at or
above 10kft.
&&


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

&&

$$

DISCUSSION...Soulat
AVIATION...Meltzer

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