Morongo Valley, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

016
FXUS65 KVEF 182349
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
449 PM PDT Thu Jun 18 2026

.KEY MESSAGES...

* Dry conditions and elevated winds will result in critical fire
  weather conditions tomorrow.

* Temperatures will increase next week as high pressure builds
  over the Southwestern US.

&&

.DISCUSSION...Today through Wednesday.

A shortwave trough will approach the West Coast tomorrow, resulting
in breezy southerly to southwesterly winds picking up across the
region. For the most part peak wind gusts will be in the 25 to 35
mph range, with isolated 40+ mph wind gusts in areas of higher
terrain. These winds, combined with low afternoon humidity will
result in critical fire weather conditions across southern Nevada
and northwestern Arizona - see the FIRE WEATHER section below for
further details. In addition to critical fire weather conditions,
this shortwave will also cause temperatures to "cool" a few degrees,
with more seasonal temperatures over the weekend.

Ridging will build in over the Southwestern US beginning early next
week. As 500 mb heights increase, so will temperatures with
high temperatures topping out around 5 to 10 degrees above normal
by the middle of the week. This will result in widespread
Moderate HeatRisk (Level 2 of 4) across the area with pockets of
Major HeatRisk (Level 3 of 4) beginning to pop up in lower
elevation valleys like the Colorado River Valley and Las Vegas
Valley. This level of heat will affect anyone without sufficient
cooling or hydration, especially those spending time outdoors.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast
Package...Elevated and intermittently gusty southerly winds will
continue through sunset, with some variability in direction from
around 160-220 true. Gusts will reach to around 20KT, with gusts
diminishing after sunset. Overnight, winds trend south-
southwesterly, with speeds expected to drop under 10KT. By mid-
morning, south-southeasterly gusts to around 20KT will resume,
with winds expected to veer to the southwest early to mid-
afternoon with gusts increasing to around 25KT thereafter through
the end of the period. VFR conditions will continue with FEW-SCT
clouds around 15-20kft, and wildfire smoke from fires north of the
Valley continuing to impact approaches through the Mormon Mesa
corridor. Temperatures will remain above 100F through around 04Z
this evening, and exceed 100F again around 19Z-03Z Friday.


For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Through sunset, winds
across the area generally remain southerly with some variability,
gusting to around 20-25KT with gusts expected to diminish after
sunset. Sustained winds will drop to around 5-10KT overnight,
with gusty southerly to southwesterly winds resuming mid-morning
onward, with gusts to 20-25KT in the morning increasing to 25-30KT
during the afternoon. An exception to this will be across the
northern Owens Valley, including KBIH, where elevated up-valley
winds are expected to persist a majority of the period.
Additionally, across the western Mojave Desert, including KDAG,
light easterly winds at issuance will shift to the west by sunset,
remaining westerly thereafter and becoming gusty with gusts to
25-35KT common for most of the forecast period save for a brief
lull late tonight through mid-morning. Otherwise, VFR conditions
will prevail with FEW-SCT clouds at or above 12kft, and localized
haze due to lofted wildfire smoke across the region.

&&

.FIRE WEATHER...A shortwave trough will approach the West Coast
tomorrow, resulting in southerly to southwesterly winds picking up
across the region. 20 to 25 mph sustained winds with gusts up to 35
mph are expected across southern Nevada and northwestern Arizona
late Friday morning through Friday evening. These elevated winds
combined with afternoon relative humidities in the single digits to
low teens will result in critical fire weather conditions across
southern Nevada and northwestern Arizona. Given these critical
conditions, the Fire Weather Watch has been upgraded to a Red Flag
Warning.

&&

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

&&

$$

DISCUSSION/FIRE WEATHER...Stessman
AVIATION...Phillipson

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