Morongo Valley, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

192
FXUS65 KVEF 252047
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
146 PM PDT Fri Jul 25 2025

.KEY MESSAGES...

* Temperatures will remain below normal throughout the weekend
  before a slow warm-up begins early next week.

* Moisture levels will remain low through the weekend, keeping most
  of the area dry.  A slight uptick in monsoonal moisture across
  Arizona next week will bring some precipitation chances to eastern
  Mohave County by mid-week.

&&

.DISCUSSION...through Thursday.

A closed 500mb low off the central California Coast continues to
move off to the east-northeast early this afternoon.  Over the
weekend, the low will weaken and be absorbed into larger-scale
troughing across the western US.  The main impact for our CWA will
be a continuation of lower-than-normal heights, which in turn will
keep temperatures several degrees below normal in most areas through
Sunday.  Once the low is absorbed, heights and temperatures will
increase slightly, although readings are only expected to return to
near seasonable norms by early next week. Long-range ensemble
guidance indicates the possibility of another upper-level low
developing along the central California Coast by next weekend, which
should help keep temperatures in check across our area.

With the large-scale trough in place across the west, most of the
CWA will remain in dry southwest flow, limiting, but not
eliminating, precipitation chances.  With the low moving across
central California today and tomorrow, isolated thunderstorms will
be possible in the higher elevations of the Sierra, generally north
of Mt. Whitney.  Any storms that do develop are expected to remain
over the mountains and not directly impact the Owens Valley.  Later
in the week, strong high pressure over the central plains will
spread west, allowing an increase in monsoonal flow across Arizona.
Most of the increased moisture will remain east of the CWA, but PWAT
values will increase to .70" to .80" across far southern and eastern
Mohave County by Tuesday, leading to increased chances of
thunderstorms in these areas. Currently, the chance of precipitation
in the Las Vegas Valley is minimal; however, the exact progression
of the high next week will determine how far west the precipitation
eventually spreads.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast Package...A period
of southeast winds is expected through early afternoon before winds
turn to the southwest and become gusty after 20Z. Gusty winds will
continue until around sunset before ending. Similar wind patterns
are expected tomorrow, except directions will remain more southerly
through the period. Other than FEW to SCT clouds AOA 15kft AGL late
this afternoon and early evening, mainly clear skies are expected.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Southerly breezes with
occasional gusts are expected at most regional TAF sites through the
afternoon. The exception will be KDAG, where winds will remain more
westerly. Most areas will see gusts ranging from 15 to 25 knots,
although a few isolated gusts to 30 knots will be possible across
the Owens Valley and western Mojave Desert. Similar wind conditions
are expected in all areas tomorrow. VFR conditions will prevail
through Saturday, although a few isolated afternoon thundershowers
will be possible along the Sierra both days.

&&

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

$$

DISCUSSION...Planz
AVIATION...Planz

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