907
FXUS65 KREV 232103
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
103 PM PST Sun Nov 23 2025

.KEY MESSAGES...

* Dry weather with cold mornings persists through Thanksgiving
  Day.

* Although a very low chance of light rain and snow exists tonight
  for the Oregon border, as well as increased ridge winds through
  Monday.

* Storm systems are possible starting Friday, bringing valley
  rain, mountain snow, and gusty winds.

&&

.DISCUSSION...

Upper ridge continues to dominate the weather pattern early this
week. A weak shortwave trough passes through the PacNW tonight
bring some very low chances (<5%) for light rain and snow along
the Oregon border. Patchy fog returns to portions of the Martis
Valley from Boca to Truckee along I-80 tonight into early Monday
morning. Other valleys may experience patchy fog around sunrise
to mid-morning. Otherwise, dry weather with mild afternoon
temperatures and chilly mornings prevails through Thanksgiving
Day. A few breezes are expected this afternoon, especially for
mountain ridges. Gusty ridges (30-40 mph) may persist into Monday
behind that quick system.

Under the ridge, afternoon temperatures slowly rise through the
week with a little bump on Tuesday due to a more northwesterly
flow behind the quick trough on Monday in the PacNW. Afternoon
highs will be generally in the 50s across western NV, NE CA and
Sierra communities. By mid-week, the lower valleys of western NV
will be around 60. Morning temperatures will be around or below
freezing through mid-week, then warm up to slightly above freezing
late week over western NV valleys.

Ensemble models continue to diverge on their solutions for this
weekend. The latest trend indicates a low pressure system sinking
into the Great Basin. However, the timing and placement of this
system continues to change with each run. Therefore, details about
amounts, magnitude and timing will have to wait until we get
closer to the system by mid-week, when higher resolution data
starts to come in. Nevertheless, looking at the current trend we
should prepare for at least some gusty winds, light valley rain
and mountain snow above 5-7 kft.

-HC

&&

.AVIATION...

Generally VFR conditions are expected, except for patchy fog
between 08Z to 18Z mainly for KTRK, but can`t discard other TAF
sites been affected around sunrise in western NV on Monday morning.
Winds will be generally light and VRB in valleys with stronger
ridge winds from the west that could cause minor turbulence to
nearby sites.

-HC

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

$$