830
FXUS65 KREV 032127
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
227 PM PDT WED JUN 3 2026
KEY MESSAGES
* WARM AND DRY CONDITIONS CONTINUE THROUGH FRIDAY, WITH HIGHS
AROUND 5 TO 10 DEGREES ABOVE NORMAL AND AREAS OF MODERATE
HEATRISK ACROSS WARMER LOWER VALLEYS.
* SOUTHWEST TO WEST BREEZES INCREASE TODAY AND FRIDAY, WITH THE
STRONGEST WINDS EXPECTED SATURDAY.
* ELEVATED FIRE WEATHER CONCERNS DEVELOP TODAY AND FRIDAY, WITH A
MORE WIDESPREAD ELEVATED TO LOCALLY CRITICAL FIRE WEATHER THREAT
SATURDAY.
DISCUSSION
WARM AND DRY THROUGH FRIDAY:
* LOW-AMPLITUDE RIDGING OVER CA/NV WILL MAINTAIN A WARM AND VERY
DRY AIR MASS THROUGH FRIDAY. HIGHS WILL GENERALLY REACH THE
UPPER 80S TO LOWER 90S FOR WESTERN NV VALLEYS AND UPPER 70S TO
LOWER 80S FOR SIERRA COMMUNITIES. FRIDAY REMAINS THE WARMEST
DAY, WITH MID 90S POSSIBLE ALONG PORTIONS OF THE US-95 CORRIDOR,
SUPPORTING A GREATER EXTENT OF MODERATE HEATRISK ACROSS WEST-
CENTRAL NV.
INCREASING WINDS TODAY AND FRIDAY:
* WEAK SHORTWAVES BRUSHING THE PACIFIC NORTHWEST WILL TIGHTEN THE
SURFACE PRESSURE GRADIENT AT TIMES, BRINGING INCREASED SOUTHWEST
TO WEST WINDS THIS AFTERNOON AND AGAIN FRIDAY. GUSTS OF 25-35
MPH ARE EXPECTED ACROSS PORTIONS OF NORTHEAST CA, THE SIERRA,
AND WESTERN NV, STRONGEST IN TYPICAL WIND-PRONE AREAS. IMPACTS
REMAIN MINOR BUT MAY INCLUDE CHOPPY LAKES, AVIATION TURBULENCE,
AND BRIEF FIRE WEATHER CONCERNS WHERE FUELS ARE RECEPTIVE.
STRONGER WINDS SATURDAY, THEN COOLER:
* THE MAIN PACIFIC TROUGH MOVES INTO THE PACIFIC NORTHWEST AND
NORTHERN CA/NV SATURDAY, BRINGING THE STRONGEST GRADIENT AND
DEEPEST MIXING OF THE FORECAST PERIOD. WIDESPREAD SOUTHWEST-WEST
GUSTS OF 30-40 MPH ARE FAVORED, WITH LOCALLY HIGHER GUSTS IN
WIND-PRONE CORRIDORS ALONG US-395/I-580, US-95, AND THE EASTERN
SIERRA. TEMPERATURES COOL BACK TOWARD EARLY JUNE AVERAGES SUNDAY
INTO EARLY NEXT WEEK. DRY CONDITIONS PREVAIL THROUGH AT LEAST
SUNDAY, WITH ONLY LOW SHOWER CHANCES RETURNING TUESDAY-WEDNESDAY,
GENERALLY 10-20% NEAR THE SIERRA/NORTHEAST CA AND 5-15% ACROSS
WESTERN NV.
-JOHNSTON
AVIATION
* VFR CONDITIONS PREVAIL WITH NO MEANINGFUL CIG/VIS RESTRICTIONS
EXPECTED. THE MAIN AVIATION CONCERN WILL BE SOUTHWEST TO WEST
WINDS THIS AFTERNOON-EVENING, WITH TERMINAL GUSTS GENERALLY
20-30 KT, EXCEPT SOMEWHAT LIGHTER AT KTVL. FL100 WINDS NEAR
30-35 KT WILL SUPPORT TURBULENCE AND LOCALIZED LLWS ALONG AND
EAST OF THE SIERRA.
* WINDS EASE THURSDAY, THEN INCREASE AGAIN FRIDAY AFTERNOON WITH
SIMILAR GUST MAGNITUDES TO TODAY. SATURDAY REMAINS THE HIGHER-
IMPACT AVIATION PERIOD, WITH WIDESPREAD SOUTHWEST-WEST GUSTS OF 25-
35 KT AND LOCALLY STRONGER GUSTS POSSIBLE. EXPECT INCREASED
MOUNTAIN WAVE/MECHANICAL TURBULENCE, CROSSWIND CONCERNS, AND
PERIODS OF LLWS NEAR AND EAST OF THE SIERRA.
-JOHNSTON
FIRE WEATHER
* WARM AND VERY DRY CONDITIONS THROUGH FRIDAY WILL MAINTAIN VERY
LARGE AFTERNOON VAPOR PRESSURE DEFICITS (40-50 HPA), ESPECIALLY
ACROSS WESTERN NV LOWER VALLEYS WHERE RH FALLS INTO THE SINGLE
DIGITS AND TEENS. THIS WILL CONTINUE TO DRY FINE FUELS, WITH
LOCALIZED ELEVATED FIRE WEATHER CONCERNS TODAY AND FRIDAY WHERE
SW-W GUSTS OF 25-35 MPH OVERLAP RECEPTIVE GRASSES AND BRUSH.
* SATURDAY REMAINS THE PRIMARY CONCERN AS THE STRONGEST WINDS ARRIVE
AFTER SEVERAL DAYS OF DRYING. SOUTHWEST-WEST GUSTS OVER 35 MPH ARE
LIKELY ACROSS MUCH OF WESTERN NV AND PORTIONS OF EASTERN CA, WITH
MINIMUM RH GENERALLY 8-15% IN LOWER VALLEYS. LONGER CRITICAL
WIND/RH OVERLAP SUPPORTS ELEVATED TO LOCALLY CRITICAL FIRE WEATHER
CONDITIONS WHERE FUELS ARE SUFFICIENTLY CURED.
-JOHNSTON
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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