792
FXUS65 KREV 192008
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1208 PM PST MON JAN 19 2026
KEY MESSAGES
* LIGHT WINDS AND VALLEY INVERSIONS WILL KEEP HAZY SKIES AND AIR
QUALITY REDUCTIONS THROUGH THE FIRST HALF OF THIS WEEK WITH
PATCHY FREEZING FOG IN SOME SIERRA VALLEYS.
* DRY WEATHER PREVAILS THIS WEEK WITH ABOVE AVERAGE DAYTIME
TEMPERATURES AND NEAR AVERAGE LOW TEMPERATURES.
* A PATTERN CHANGE IS POSSIBLE FOR THE LATTER HALF OF THE WEEK
ALLOWING GUSTY MOUNTAIN RIDGE WINDS TO RETURN THOUGH CONFIDENCE
IS LOW.
DISCUSSION
IT'S GONNA BE A COOL, CALM, AND COLLECTED START OF THE WORK WEEK
WITH LIGHT WINDS, VALLEY INVERSIONS, AND AFTERNOON HIGHS IN THE
LOW TO MID 50S AND UPPER 40S FOR VALLEYS AND HIGHER ELEVATIONS,
RESPECTIVELY. VALLEY INVERSIONS WILL CREATE HAZY CONDITIONS FOR W
NV AND FREEZING FOG CONCERNS FOR SIERRA VALLEYS. MOST NOTABLY THIS
WILL INCLUDE MONO LAKE WHERE AFTERNOON HIGHS AREN'T EXPECTED TO
REACH MUST PAST FREEZING. SATELLITE IMAGERY CONTINUES TO SHOW A
CLOUDED OVER MONO LAKE, THOUGH SOME OF THE FOG MIGHT LIFT A BIT
THIS AFTERNOON. OTHER SIERRA VALLEYS, SUCH AS THE MARTIS VALLEY
AND NEAR CROWLEY LAKE, CAN EXPECT FREEZING FOG IN THE MORNINGS
BEFORE DISSIPATING BY THE EARLY AFTERNOON.
A CUTOFF LOW OFF THE COAST OF SOCAL MAY BRING A PATTERN CHANGE AS
EARLY AS WEDNESDAY, THOUGH CONFIDENCE REMAINS LOW. THE LOW-LEVEL
FEATURE STILL HAS PLENTY OF WIGGLE ROOM TO MEANDER, THOUGH RECENT
MODELS HAVING GOTTEN BETTER AT LOCATION AND TIMING AGREEMENT. AS
OF NOW, THIS BRINGS LIGHT (<15% CHANCE) SHOWER CHANCES TO THE
EASTERN SIERRA. QPF AND SNOW AMOUNT FORECASTS SHOW A WHOPPING
0.00-0.05" ALONG THE CRESTS, THOUGH, DESPITE SNOW LEVELS AROUND
7300'. OTHER THAN THAT, WINDS MAY ALSO PICK UP ENOUGH TO DISPERSE
VALLEY INVERSIONS AND FREEZING FOG.
THE NEXT ITEM OF NOTE IS THE POSSIBILITY FOR A BACKDOOR COLD FRONT
DROPPING IN FROM THE NORTH. THE 700MB GFS HINTS AT INCREASED
EASTERLY WINDS LATE FRIDAY INTO SATURDAY, THOUGH THE MAGNITUDE
REMAINS LOW AT THIS POINT. IF THIS PANS OUT, EXPECT IMPACTS TO
BACKCOUNTRY RECREATION.
-GIRALTE
AVIATION
VFR CONDITIONS AND LIGHT SURFACE WINDS CONTINUE FOR AREA TAF SITES
TO BEGIN THE WEEK. THE ONLY EXCEPTION IS AT KTRK WHERE PATCHY AND
MAINLY SHALLOW FZFG IS EXPECTED TO RENEW TONIGHT INTO TOMORROW
MORNING (UNTIL ABOUT 15-16Z). HAZE IN W.NV MAY LEAD TO REDUCED
SLANTWISE VISIBILITIES.
-GIRALTE/078
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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