928
FXUS65 KREV 281024
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
224 AM PST WED JAN 28 2026
KEY MESSAGES
* GUSTY RIDGE WINDS AND CHANCES FOR LIGHT SNOW SHOWERS CONTINUE THIS
MORNING WITH A WEAK WEATHER SYSTEM MOVING THROUGH THE AREA.
* DRY CONDITIONS RESUME LATER THIS AFTERNOON AND PERSIST THROUGH
THE REST OF THE WEEK WITH HIGH PRESSURE RETURNING TO THE AREA.
* A SLOW, GRADUAL WARMING TREND INTO THIS WEEKEND WILL BRING ABOVE
AVERAGE TEMPERATURES BY SATURDAY.
DISCUSSION
THE LATEST RAP ANALYSIS OF THE UPPER AIR PATTERN DEPICTS A SHORTWAVE
TROUGH CURRENTLY OVER N CA WITH THE AXIS OF AN UPPER RIDGE TO THE
EAST OF IT OVER UT. THE SHORTWAVE FEATURE IS RESPONSIBLE FOR THE
ONGOING LIGHT SNOW SHOWERS AS WELL AS GUSTY WINDS THIS MORNING.
ACCORDING TO THE LATEST RUN OF THE RRFS, THE MORNING PRECIPITATION
CHANCES START TO TAPER OFF AROUND 6 AM PT AND ARE COMPLETELY OUT
OF THE CWA BY 8 AM PT. THE REMAINING SNOW CHANCES SPREAD FROM THE
OR BORDER DOWN TO AROUND ALPINE, DOUGLAS, LYON, & N MINERAL
COUNTIES. AREAS THAT EXPECT TO SEE ADDITIONAL SNOWFALL
ACCUMULATION THIS MORNING ARE HIGHER ELEVATIONS IN NE CA AND THE
NORTHERN SIERRA AS 0.1-0.2 INCH PER HOUR SNOWFALL RATES ARE
POSSIBLE AT THE SIERRA PASS LEVEL THROUGH AT LEAST 5 AM PT. OTHER
PORTIONS OF THE CWA THAT SEE SHOWERS EXPECT MINIMAL TO NO
SNOWFALL ACCUMULATION THIS MORNING. SOME OF OUR SITES ARE
EXPERIENCING LOWER VISIBILITIES WITH THESE SNOW SHOWERS
PARTICULARLY IN NE CA AND AROUND THE TAHOE BASIN, SO PLEASE USE
CAUTION IF TRAVELING THIS MORNING. ROADS AND SURFACES DURING THE
MORNING COMMUTE MAY ALSO BE SLICK OR ICY WITH THE COLD TEMPERATURES
AND RECENT SNOWFALL. WHILE SOUTHWESTERLY RIDGE WINDS GUSTING UP
TO AROUND 60-70 KTS CONTINUE THIS MORNING, MODEL GUIDANCE SHOWS
THE SHORTWAVE OVER THE NV/UT BORDER BY THE AFTERNOON HOURS TODAY
ALLOWING THE WINDS TO BEGIN TO DECREASE. ALSO ON THE DECREASE WILL
BE THE CLOUD COVER STARTING IN THE LATE MORNING WITH THE SYSTEM
MOVING OUT. DAYTIME HIGH TEMPERATURES FOR TODAY ARE FORECAST TO BE
IN THE UPPER 40S TO LOWER 50S RANGE FOR THE W NV VALLEYS WITH
SIERRA COMMUNITIES RANGING BETWEEN THE MIDDLE 30S AND THE MIDDLE
40S. OVERNIGHT LOWS TONIGHT LOOK TO BE GENERALLY IN THE 20S TO
LOWER 30S RANGE WITH THE EXCEPTION OF SOME SIERRA COMMUNITIES
THAT MAY DROP DOWN AS LOW AS THE MIDDLE TEENS.
FOR THE REMAINDER OF THE WEEK, A HIGH PRESSURE RIDGE BUILDS OVER THE
WESTERN CONUS ALLOWING FOR ANOTHER DRY PERIOD AND A WARMING TREND.
BY SATURDAY, DAYTIME HIGHS ARE FORECAST TO HAVE RAISED BY ~10
DEGREES COMPARED TO WHAT IS EXPERIENCED TODAY. HOWEVER, OVERNIGHT
LOW TEMPERATURES MAY ONLY CLIMB BY ~5 DEGREES BY THE WEEKEND
COMPARED TO TONIGHT'S LOWS AND BE IN THE 20S AND 30S. WHILE THE
WINDS SHOULD BE MOSTLY LIGHT AND VARIABLE THROUGH THE REST OF THE
WEEK, THE HIGH PRESSURE DOES NOT LOOK TO KEEP CLOUD COVER AWAY
WITH MODELS SHOWING SOME AMOUNT OF CLOUDS VIRTUALLY EACH DAY.
ANOTHER THING TO MENTION IS THE POSSIBILITY OF FREEZING FOG
DEVELOPING DURING THE OVERNIGHT HOURS OVER THE NEXT FEW DAYS IN
THE SIERRA AND MARTIS VALLEYS DUE TO THE RECENT PRECIPITATION. BE
PREPARED FOR THIS POTENTIAL HAZARD IF YOU ARE TRAVELING THROUGH
THESE AREAS.
TO BEGIN NEXT WEEK (AND FEBRUARY), EXTENDED GUIDANCE SHOWS A WEAK
TROUGH MOVING THROUGH THE NW CONUS ON SUNDAY AND EARLY MONDAY
ALLOWING FOR A COLD FRONT TO MOVE THROUGH THE AREA ALONG WITH SOME
LOW PRECIPITATION CHANCES TO RETURN TO AREAS CLOSER TO THE OR
BORDER. LOW CONFIDENCE CURRENTLY ON THESE AS MODEL TO MODEL RUNS
STILL HAVE BEEN SHOWING SOME GOOD UNCERTAINTY, BUT NOT ANTICIPATING
ANY MAJOR IMPACTS AT THIS TIME. BY LATE MONDAY GOING THROUGH
MIDWEEK, LONG-TERM GUIDANCE PROJECTS ANOTHER HIGH PRESSURE RIDGE
BUILDING CAUSING ANOTHER DRY PERIOD ALONG WITH THE WARMING TREND
TO CONTINUE FOLLOWING A BRIEF AND SLIGHT DROP IN TEMPERATURES ON
MONDAY. -078
AVIATION
AS THE WINTRY SYSTEM MOVES THROUGH THE REGION THIS MORNING, MOST AREA
TAF SITES (KMMH BEING THE EXCEPTION) WILL HAVE VICINITY LIGHT SHOWER
CHANCES CONTINUE THROUGH AROUND 12-13Z. KTRK AND KTVL WILL SEE TEMPORARY
IFR CONDITIONS WHEN A SNOW SHOWER OCCURS NEAR THE TERMINALS. LLWS AND
TURBULENCE OVER THE SIERRA AND SIERRA FRONT CONTINUE THIS MORNING UNTIL
AROUND 15Z WITH THE SYSTEM DEPARTING TO THE EAST. LIGHT WINDS AND DRY
CONDITIONS ARE FORECAST FOR THE REST OF TODAY FOLLOWING THE SYSTEM
AND GOING THROUGH THE OVERNIGHT HOURS. -078
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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