902
FXUS65 KVEF 242128
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
229 PM PDT Thu Jul 24 2025

.KEY MESSAGES...

* Below-normal temperatures and afternoon southerly breezes expected
  to continue through the weekend before temperatures heat up next
  week.

* In general, dry conditions continue through the weekend into early
  next week. Monsoonal moisture increases across Arizona, resulting
  in precipitation chances for Mohave County mid-to-late week.
&&


.DISCUSSION...Today through Thursday.

A persistent, loitering closed low off the southern California coast
will allow for continued below-normal temperatures across the Desert
Southwest through the weekend. The resultant southwesterly flow
aloft will help to elevate southerly breezes each afternoon across
the forecast area, with peak gusts between 15 and 25 mph. The
aforementioned closed low will weaken into an open wave over the
weekend before getting swept away by a trough growing across the
western CONUS. Meanwhile, a ridge of high pressure will continue to
build and retrograde across the southern CONUS, which will increase
heights over our region, allowing temperatures to climb back to at-
or-above normal next week.

The dry southwest flow aloft as a result of the closed low off the
southern California coast will keep afternoon relative humidity
values in the single-digits and precipitation chances near-zero
through the weekend. The exception will be along the eastern Sierra
Crest, where there is a 10-15 percent chance of isolated shower and
thunderstorm activity today and Friday afternoon. Next week, a
retrograding area of high pressure over the southern CONUS will help
usher monsoonal moisture into the Desert Southwest. In general, this
moisture will funnel into Arizona and New Mexico, as a trough
digging through the western CONUS will limit moisture advection
further west. Slight (20-40 percent) chances of showers and
thunderstorms exist across Mohave County Tuesday through Thursday.
Moisture content looks modest (0.50 - 0.75"), making erratic gusty
winds and frequent lightning the primary concerns.
&&


.AVIATION...For Harry Reid...For the 00Z Forecast Package...
South-southwest gusts continue around 20 kts through the afternoon.
Speeds will decrease after sunset. Expect similar winds on Friday.
FEW-SCT move in this evening aoa 25 kft. Best chance of temperatures
at or above 100 degrees exists around 00Z.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Breezy southerly winds
will pick up across the region today, with gust speeds around 20 kts
for the Las Vegas Valley and Colorado River Valley TAF sites and
around 25 kts for KBIH and KDAG. Gust speed and frequency will
decrease after sunset, with similar winds expected on Friday. FEW-
SCT move in this evening aoa 25 kft.
&&


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


$$

DISCUSSION/AVIATION...Soulat


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