497
FXUS65 KREV 041948
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1248 PM PDT FRI SEP 4 2026
KEY MESSAGES
* LIGHT RAIN SHOWERS CONTINUE ALONG AND NORTH OF INTERSTATE 80
INTO THE AFTERNOON WITH A LOW CHANCE OF THUNDERSTORMS.
* GUSTY WINDS WILL POSE IMPACTS TO HOLIDAY TRAVEL AND RECREATION
TODAY AND SUNDAY.
* BELOW NORMAL TEMPERATURES, BREEZY AFTERNOON WINDS, AND LOW
SHOWER CHANCES ARE FAVORED NEXT WEEK.
DISCUSSION
* A BAND OF LIGHT SHOWERS THAT STRETCHES FROM LAKE TAHOE NORTHWARD
INTO PLUMAS AND SOUTHEASTERN LASSEN COUNTIES, AND THEN EASTWARD
INTO CENTRAL WASHOE COUNTY WILL PERSIST INTO THE MID-AFTERNOON.
ANY ADDITIONAL RAINFALL TOTALS TODAY WILL BE LIGHT, AND
GENERALLY UNDER 0.10 INCH. THERE REMAINS A SLIGHT 10-20% CHANCE
OF THUNDERSTORMS THIS AFTERNOON ASSOCIATED WITH THE
AFOREMENTIONED BAND OF PRECIPITATION, AND THOSE STORMS WILL
STILL CAPABLE OF INFREQUENT LIGHTNING AND WIND GUSTS TO 40 MPH.
BUT IT'S BEEN TOO CLOUDY TO GET ANY SUFFICIENT INSTABILITY.
* TEMPERATURES TODAY ARE STRUGGLING TO GET INTO THE MID-60S IN
THE GREATER RENO AREA AND LOW-70S IN THE INNER BASIN. WE ARE
STILL SITTING IN THE MID-40S TO LOW 50S FOR MOST SIERRA
LOCATIONS, AND EVEN UPPER 30S ON THE HIGHEST RIDGES. THESE
READINGS ARE BETWEEN 15 TO 25 DEGREES BELOW AVERAGE FOR THE
FIRST WEEK OF SEPTEMBER. WIDESPREAD FREEZING TEMPERATURES ARE
LIKELY (80%) FOR EASTERN SIERRA VALLEYS AND NORTHEAST CA
TONIGHT, AND 40S FOR A MAJORITY OF WESTERN NV. WINDS ARE CALMING
THIS AFTERNOON AND WILL CONTINUE TO DECREASE TONIGHT.
* FOR SATURDAY, WE'LL DRY OUT AND KEEP THE CALM WINDS. BUT BY
SUNDAY, ANOTHER UPPER LOW PRESSURE WILL SWING THROUGH THE
REGION. THIS WILL ONCE AGAIN RAMP UP GUSTY WINDS IN THE
AFTERNOON AND ALLOW FOR THE SHOWER AND THUNDERSTORM CHANCES TO
RETURN. HIGHEST RAIN PROBABILITIES (40-60%) ON SUNDAY ARE FROM
NORTHERN LASSEN COUNTY TO THE OREGON BORDER, WITH A 10-20%
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. THESE SAME AREAS HAVE
BETWEEN A 30-60% CHANCE FOR AT LEAST 0.10 INCHES OF RAIN, BUT
MOST AREAS ON SUNDAY WILL BE DRY.
* A LONG-WAVE EASTERN PACIFIC TROUGH PATTERN WILL PERSIST INTO THE
MIDDLE OF NEXT WEEK. THIS WILL KEEP US UNDER COOLER THAN NORMAL
TEMPERATURES, BREEZY AFTERNOONS, AND LOW 20% SHOWER CHANCES. AS
FOR LATE NEXT WEEK, THERE REMAINS HIGH UNCERTAINTY INTO THE
REMNANT TROPICAL MOISTURE MOVING NORTH INTO THE REGION. AT THIS
TIME, THERE REMAINS PHASING AND TIMING DIFFERENCES BETWEEN THE
ENSEMBLES IN THE UPPER AIR PATTERN. -MCKELLAR
AVIATION
LIGHT RAIN SHOWERS MAY PERIODICALLY LOWER CIGS/VIS TO MVFR
CONDITIONS AT KTRK-KTVL THROUGH THIS AFTERNOON. A FEW SHOWERS MAY
STILL PASS OVER KRNO THROUGH 00Z, BUT CHANCES ARE LOW. LOW CLOUDS
WILL LEAD TO MOUNTAIN OBSCURATION AT ALL TERMINALS TODAY AND FOR
SIERRA TERMINALS ON SATURDAY. THERE ARE ALSO LOW CHANCES FOR FOG
IN KTRK ON SATURDAY MORNING. -MCKELLAR
REV WATCHES/WARNINGS/ADVISORIES
NV...LAKE WIND ADVISORY UNTIL 9 PM PDT THIS EVENING NVZ001>004.
CA...LAKE WIND ADVISORY UNTIL 9 PM PDT THIS EVENING CAZ071>073.
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