265
FXUS65 KREV 300832
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1232 AM PST TUE DEC 30 2025
KEY MESSAGES
* DRY WEATHER, COLD MORNINGS, AND FREEZING FOG IN THE SIERRA
AGAIN TODAY.
* HAZY CONDITIONS THROUGH THIS WEEK OVER WESTERN NV VALLEYS DUE TO
STRONG INVERSIONS.
* ROUNDS OF STORMS ARRIVING NEW YEARS AND LOOK TO LINGER THROUGH
WEEKEND.
DISCUSSION
VERY COLD MORNINGS, NEAR SEASONAL AFTERNOON HIGHS, VALLEY
INVERSIONS, AND SIERRA FREEZING FOG REMAIN THE NAME OF THE GAME
TODAY. AS CLOUD COVER INCREASES THROUGH TODAY, THIS MAY INHIBIT
THE POTENTIAL FOR FREEZING FOG FOR SIERRA VALLEYS WEDNESDAY
MORNING.
THAT INCREASING CLOUD COVER ORIGINATES FROM THE LOW OFF THE COAST
OF BAJA CALIFORNIA, WHICH IS STEADILY BEGINNING ITS TREK
NORTHWARD. THIS LOW WILL BRING A HANDFUL OF THINGS, INCLUDING A
STRENGTHENED WARMING TREND THROUGH AT LEAST FRIDAY, WITH
TEMPERATURES ALMOST 10 DEGREES ABOVE NORMAL (MID 50S FOR VALLEYS
AND MID 40S FOR SIERRA COMMUNITIES). THE LOW WILL ALSO BRING
INCREASED PRECIP CHANCES, WITH PRECIP MOVING IN AS EARLY AS
DAYBREAK ON NEW YEARS DAY, PER LATEST CAM GUIDANCE. SNOW LEVELS
WILL BE HIGH; OVER 9 KFT. THIS WILL BRING THE THREAT FOR RAIN ON
SNOW. IN NE CA, CONDITIONS WILL BE CONDUCIVE TO FLOODING CONCERNS,
PRIMARILY NEAR AND ALONG THE SUSAN RIVER. IN W NV, THE BEST
CHANCES FOR SPILLOVER RAIN WILL BE WEDNESDAY.
SHOWERS WILL LINGER THROUGH THURSDAY AND FRIDAY WITH THE SECOND
BIG PUSH OF MOISTURE LATE FRIDAY INTO SATURDAY. HOWEVER, THIS
SYSTEM IS MORE AR-Y IN NATURE. SNOW LEVELS WILL BE MUCH LOWER (5-6
KFT) AND THERE WILL BE GUSTY WINDS, AS WELL (MOSTLY FRIDAY AND
SATURDAY). PRECIP CHANCES CONTINUE THROUGH AT LEAST THE BEGINNING
OF NEXT WEEK, THOUGH CONFIDENCE REMAINS LOW.
-GIRALTE
AVIATION
VFR CONDITIONS PREVAIL FOR MUCH OF THE REGION THROUGH WEDNESDAY
WITH LIGHT WINDS. THE ONLY EXCEPTION WILL BE FZFG FOR KTRK UNTIL
ABOUT 18Z THIS MORNING. ADDITIONALLY, MORNING VALLEY INVERSIONS
MAY PRODUCE SLANTWISE VISIBILITY CONCERNS, PRIMARILY FOR SIERRA
FRONT TERMINALS.
-GIRALTE
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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