163
FXUS65 KREV 201844
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1044 AM PST MON JAN 20 2025
SYNOPSIS
* COLD AND DRY TODAY WITH GUSTY WINDS ALONG THE SIERRA CRESTS.
* WARMING UP TUESDAY THROUGH FRIDAY, WITH CONTINUED DRY CONDITIONS,
LIGHT WINDS, AND INVERSIONS.
* A PATTERN CHANGE BY THE WEEKEND WITH COLDER TEMPERATURES,
BREEZY WINDS AND POSSIBLE SNOW SHOWERS.
DISCUSSION
OVERNIGHT LOWS HOVERED JUST BELOW 20 DEGREES ACROSS MUCH OF THE
REGION, WITH EVEN COLDER AIR POSITIONED TO OUR EAST. OUR HIGH
TEMPERATURES WILL STRUGGLE TO EXCEED 40 DEGREES FOR EVEN OUR WARMEST
SITES TODAY. COUPLED WITH THE INCREASING WINDS OVERNIGHT THAT
BROUGHT GUSTS 75 TO 85 MPH ALREADY THIS MORNING ALONG WARD PEAK. WE
EXPECT WINDS TO PERSIST AND EVEN INCREASE SLIGHTLY INTO THE
AFTERNOON AND EVENING HOURS. AFTER SUNSET, WINDS SHOULD BEGIN TO
TAPER. WITH LIGHT WINDS AND CLEAR SKIES DURING THE OVERNIGHT HOURS,
TONIGHT'S LOW TEMPERATURES ARE EXPECTED TO FALL A BIT LOWER THAN
LAST NIGHT'S.
TUESDAY BRINGS IN MORE OF THE SAME IN TERMS OF CLEAR SKIES AND LIGHT
WINDS, WHICH WILL INTRODUCE A WARMING TREND THROUGH THE END OF THE
WEEK. THIS WILL BRING A GRADUAL WARMING TREND THAT WILL HAVE OUR
TEMPERATURES RANGING 5-10 DEGREES ABOVE AVERAGE BY THE END OF THE
WEEK.
FOR THE WEEKEND, A TROUGH IS POSITIONED TO DROP IN FROM A
CONTINENTAL POLAR AIR MASS OVER CANADA WHICH LOOKS TO PHASE WITH
A WEAK LOW OVER THE PACIFIC. SOME ENSEMBLES ARE BRINGING THE
CENTER OF CIRCULATION INTO OUR REGION BY WAY OF THE PACIFIC COAST
AND CENTRAL VALLEY, WHILE OTHERS BRING THE LOW CENTER IN OVER THE
GREAT BASIN. THIS DISCREPANCY IN TRACK WILL MATTER FOR DETAIL SUCH
AS PRECIPITATION AMOUNTS, WIND DIRECTION AND SPEED, AND HOW MUCH
COLD AIR WE SEE. IF THE SECOND SCENARIO PANS OUT, WE WOULD SEE A
MUCH COLDER NORTH TO EAST WIND, IF THE FIRST WINS, WE WOULD SEE
SOUTHWESTERLY FLOW, WHICH WOULD MODERATE THE COLD AIR INTRUSION.
FOR ALL THESE REASONS, WE ARE CONFIDENT IN THE APPEARANCE OF THIS
DISTURBANCE THIS WEEKEND, WITH SATURDAY LOOKING TO BE THE DAY WITH
THE MOST WIDESPREAD IMPACTS. FORECAST CONFIDENCE IS MUCH LOWER IN
TERMS OF THE DETAILS, BUT AS WE MOVE FORWARD THROUGH THE WEEK,
THE DETAILS WILL BECOME MORE CLEAR.
HRICH
AVIATION
* VFR CONDITIONS AT ALL WESTERN NEVADA AND SIERRA TERMINALS TODAY.
* RIDGE WINDS CONTINUE TO INCREASE THIS AFTERNOON, WITH MAXIMUM
GUSTS TO 65-75 KTS. EXPECT LLWS FOR KTVL/KTRK AND MOUNTAIN WAVE
TURBULENCE ALONG AND WEST OF THE SIERRA CREST. MCKELLAR/HRICH
REV WATCHES/WARNINGS/ADVISORIES
NV...LAKE WIND ADVISORY UNTIL 7 PM PST THIS EVENING NVZ002.
CA...LAKE WIND ADVISORY UNTIL 7 PM PST THIS EVENING CAZ072.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page