674
FXUS65 KVEF 220049
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
549 PM PDT Tue Oct 21 2025


.KEY MESSAGES...

* Quiet weather is expected across the region today, with a low
  pressure system bringing mountain precipitation chances,
  slightly cooler temperatures, and breezy winds to the region
  tomorrow.

* After a brief lull on Thursday and Friday, another low pressure
  system will move through the Great Basin over the weekend,
  bringing cooler temperatures and gusty wind to the region.

&&

.DISCUSSION...through Monday.

Weather across southern Nevada, southeastern California, and
northwestern Arizona will be dry and quiet with seasonal
temperatures today before things become slightly more unsettled
tomorrow. The cut-off low pressure system currently churning off the
coast of southern California will lift into the Southwestern US
tomorrow, bringing increased chances for precipitation to portions
of the area. The higher terrain of southern Nevada, northwestern
Arizona, and Inyo County will see a 15 to 30% chance of light
precipitation tomorrow. The eastern Sierra will have a better shot
at seeing precipitation with chances in the 30 to 50% range.
Overall, precipitation impacts should be minimal with precipitation
totals in the trace to quarter inch range. Snow levels will be above
9,000 feet, which will limit snow accumulation to the Sierra crest
where an inch or two of new snow will be possible. In addition to
increased precipitation chances for portions of the region, this
system will also bring breezier winds to the area along with
increased cloud cover and slightly cooler temperatures.

There will be a brief lull in terms of weather on Thursday and
Friday as we find ourselves under transient shortwave ridging aloft.
A stronger upper-level trough will roll through the Great Basin over
the weekend, bringing cooler temperatures and gusty winds to the
area. Southwesterly to westerly winds will pick up across the region
on Saturday, peaking on Sunday before eventually swinging around to
the northwest behind the trough axis. The strongest winds are
expected in our typical southwesterly wind belt extending across the
Mojave Desert through southern Nevada and into northwestern Arizona.
There remains uncertainty regarding how strong winds will be due to
uncertainty regarding how strong the trough will be as it swings
through.


&&

.AVIATION...For Harry Reid...For the 00Z Forecast Package...Light
east-northeasterly winds will continue through the remainder of
the afternoon, swinging around to the west during the evening
hours in a typical diurnal fashion. Winds will remain light,
becoming light and variable early tomorrow morning with winds
picking up and swinging around to the southwest later tomorrow
afternoon. VFR conditions will prevail through the TAF period with
FEW to SCT aoa 12kft filtering through the area.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Winds will remain
relatively light, 10 knots or less, and will follow typical daily
directional trends through the remainder of the afternoon and
into the evening hours. The exception to this will be the Colorado
River Valley where winds will favor a northerly direction with
gusts to around 20 to 30 knots in the Bullhead City/Laughlin area.
VFR conditions will continue with increasing mid-level clouds
around 12-15kft moving in this afternoon. Breezier southerly to
southwesterly winds are expected across the region on Wednesday as
low pressure pushes into the southwestern United States. Clouds
lower and thicken in the area of KBIH by midday Wednesday
becoming SCT at 7-10kft with isolated showers and thunderstorms
developing.

&&

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

&&

$$

DISCUSSION...Stessman
AVIATION...FGZ

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NWS Flagstaff Office