916
FXUS65 KREV 272134
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
134 PM PST SAT DEC 27 2025
KEY MESSAGES
* MUCH COLDER TEMPERATURES AND DRY WEATHER PREVAILS THIS WEEKEND
WITH POTENTIAL FOR FREEZING FOG IN THE SIERRA.
* QUIET WEATHER WITH MORNING INVERSIONS LEADING TO AIR STAGNATION
IS EXPECTED NEXT WEEK OVER WESTERN NV VALLEYS.
* THERE IS POTENTIAL FOR THE NEXT STORM SYSTEM ON NEW YEARS DAY
THROUGH NEXT WEEKEND, BUT THE SYSTEM LOOKS WEAK COMPARED TO THE
LAST ONE.
DISCUSSION
A GENTLE NORTH BREEZE SETS UP TODAY AS WE'RE ON THE EDGE OF A
COLD AIRMASS THAT'S DIPPING SOUTH AND EAST OF WESTERN NV. WITH
THIS COLDER AIR WORKING ITS WAY IN, IT'LL BRING OUR HIGH AND LOW
TEMPERATURES DOWN TO 5 DEGREES BELOW NORMAL FOR THIS TIME OF YEAR.
MORNING LOWS IN THE SIERRA TOMORROW AND MONDAY COULD SEE LOWS IN
THE SINGLE DIGITS! NEVADA VALLEYS THOSE MORNINGS WILL BE A CHILLY
20 DEGREES, SO MAKE SURE TO BUNDLE UP! WE'LL WARM UP EACH DAY
AFTER MONDAY INTO LATE-WEEK WITH HIGHS REACHING UP TO 50 DEGREES
AND LOWS NEAR 30.
LIGHT WINDS WILL PREVAIL THIS WEEK, CAUSING MORNING VALLEY
INVERSIONS AND STAGNANT AIR STARTING SUNDAY AND GOING THROUGH AT
LEAST WEDNESDAY. WE'LL BE KEEPING AN EYE ON THE FREEZING FOG
POTENTIAL SUNDAY MORNING TOO FOR SIERRA VALLEYS WITH THE
COMBINATION OF CLEAR SKIES, LIGHT WINDS, AND RECENT SNOWFALL. AS
OF RIGHT NOW, THERE'S A 40-50% CHANCE FOR FREEZING FOG EACH
MORNING THROUGH MID-WEEK.
LOOKING AHEAD TO THURSDAY AND BEYOND, HIGH PRESSURE MOVES OUT AND
THE STORM DOOR POTENTIALLY OPENS UP AGAIN. ENSEMBLES SHOW A 500MB
NEGATIVE HEIGHT ANOMALY MOVING IN TOWARDS THE END OF THE WEEK AND
STAYING OFF THE COAST THROUGH NEXT WEEKEND. ENSEMBLES AND LONG
RANGE MODELS ARE STILL IN GREAT DISAGREEMENT THOUGH, SO TIMING AND
PLACEMENT OF ANY STORMS REMAINS UNCERTAIN.
-JUSTIN
AVIATION
VFR CONDITIONS WILL PREVAIL FOR MUCH OF THE REGION OVER THE
NEXT 24 HOURS, CHARACTERIZED BY LIGHT WINDS AND FEW TO SCT MID-
TO-HIGH LEVEL CLOUDS. ANOTHER ROUND OF FZFG IS POSSIBLE FOR
SIERRA VALLEYS BETWEEN 08-17Z SUNDAY, BRINGING LIKELY IFR/LIFR
IMPACTS TO KTRK AND POTENTIALLY KTVL. WHILE THERE IS CURRENTLY A
40-50% PROBABILITY OF FZFG, THE DEVELOPMENT MAY BE INHIBITED BY AN
INCREASE IN MID-TO-HIGH LEVEL CLOUD COVER ARRIVING BETWEEN 06-19Z
SUNDAY.
-JOHNSTON
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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