357
FXUS65 KREV 150740
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1240 AM PDT TUE SEP 15 2026
KEY MESSAGES
* TYPICAL AFTERNOON BREEZES TODAY WILL INCREASE ON WEDNESDAY,
PRODUCING MINOR FIRE, RECREATION, AND TRAVEL IMPACTS.
* LOW PRESSURE BRINGS A LOW CHANCE OF RAIN AND THUNDERSTORMS TO
AREAS NEAR THE OREGON BORDER WEDNESDAY AND THURSDAY.
* WARM AND DRY WEATHER IS FAVORED FRIDAY THROUGH THE WEEKEND.
CHANCES OF RAIN AND BREEZY WINDS MAY RETURN EARLY NEXT WEEK.
DISCUSSION
A DRY AND MILD WEATHER PATTERN REMAINS IN PLACE TODAY WITH DAYTIME
HIGHS IN THE 70S AND 80S, WHICH IS ABOUT ON PAR FOR MID-SEPTEMBER.
TYPICAL WEST BREEZES RETURN THIS AFTERNOON WITH GUSTS REACHING 25-30
MPH. DRY AND BREEZY CONDITIONS MAY SUPPORT BRIEF ELEVATED FIRE
CONCERNS ALONG THE SIERRA FRONT IN THE AFTERNOON.
A COMPACT UPPER LOW WILL DIG INTO NORTHERN CALIFORNIA ON WEDNESDAY
BEFORE LIFTING NORTHEAST TO THE NORTHERN ROCKIES ON THURSDAY. IN
RESPONSE, WINDS WILL INCREASE FROM THE TAHOE-RENO AREA SOUTH TO MONO
AND MINERAL COUNTIES WEDNESDAY AFTERNOON, YIELDING S-SW GUSTS AROUND
30-35 MPH. A FEW WINDIER SPOTS (I.E., US-395 BETWEEN MAMMOTH AND
MONO LAKE) MAY SEE GUSTS OF 40-45 MPH. MEANWHILE, SIERRA RIDGES WILL
BE GUSTING TO 50 MPH AT TIMES WEDNESDAY NIGHT INTO THURSDAY MORNING.
THESE WINDS WILL OVERLAP RH REDUCTIONS TO 7-15%, WHICH SHOULD
SUPPORT A FEW HOURS OF ELEVATED TO LOCALLY CRITICAL FIRE WEATHER
CONDITIONS ACROSS FAR W NEVADA INTO MONO COUNTY. OTHER POTENTIAL
WIND IMPACTS INCLUDE CHOPPY LAKES, GUSTY CROSSWINDS ALONG
US-395/I-580 BETWEEN RENO AND MAMMOTH, AND BUMPIER FLIGHTS
IN/OVER THE SIERRA. ALSO, LINGERING GUSTY WINDS WILL CONTRIBUTE TO
A CHILLY, BRISK MORNING FOR HIGHER SIERRA ELEVATIONS ON THURSDAY.
FARTHER NORTH, CHANCES OF RAIN SHOWERS INCREASE TO 10-20%
WEDNESDAY AFTERNOON ACROSS PORTIONS OF LASSEN COUNTY INTO THE
SURPRISE VALLEY AND FAR N WASHOE COUNTY. WEAK INSTABILITY AND
MOISTURE WILL ALSO SUPPORT A 10-15% CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. A FEW SHOWERS MAY DEVELOP FARTHER SOUTH CLOSER TO I-80
ON WEDNESDAY, BUT WILL BE DEPENDENT ON THE EVENTUAL TRACK OF THE
LOW PRESSURE. LOW (10-20%) SHOWER AND THUNDERSTORM CHANCES LINGER
THROUGH THURSDAY, BUT WILL BE CONFINED TO AREAS NEAR THE OREGON
BORDER.
A DRY FRONTAL PASSAGE IS EXPECTED FRIDAY AS THE LOW PRESSURE DEPARTS
THE REGION. EAST TO NORTHEAST BREEZES WILL DEVELOP IN ITS WAKE,
BECOMING GUSTY AT TIMES ALONG AND WEST OF THE SIERRA CREST. WEAK
HIGH PRESSURE MOVES OVER THE REGION LATE THIS WEEK, ALLOWING WARM
AND DRY WEATHER TO PREVAIL FRIDAY THROUGH THE WEEKEND. ANOTHER LOW
PRESSURE PASSAGE INCREASES THE POTENTIAL FOR BREEZY WINDS AND
SHOWERS TO RETURN EARLY NEXT WEEK, BUT CONFIDENCE REMAINS LOW.
-SALAS
AVIATION
WIDESPREAD VFR CONDITIONS PREVAIL TODAY, WITH LIGHT MORNING WINDS
BECOMING SW-W GUSTS AT 20-25 KT AFTER 19Z. WINDS ARE EXPECTED TO
INCREASE ON WEDNESDAY, LENDING TO LLWS CONCERNS AND MOUNTAIN WAVE
TURBULENCE ALONG THE EASTERN SIERRA.
-SALAS
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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