697
FXUS65 KREV 311903
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1203 PM PDT SUN MAY 31 2026
KEY MESSAGES
* SLIGHT CHANCE (10-15%) OF SHOWERS AND ISOLATED THUNDERSTORMS
ACROSS NE CALIFORNIA AND NW NEVADA THIS AFTERNOON, WITH SIMILAR
CHANCES IN THE SIERRA OF MONO COUNTY MONDAY.
* FOG DEVELOPMENT FOR FOG-PRONE SIERRA VALLEYS AGAIN TONIGHT
THROUGH TOMORROW MORNING.
* ABOVE NORMAL TEMPERATURES THROUGH MID-WEEK, WITH A PATTERN
CHANGE ARRIVING BY THE WEEKEND.
DISCUSSION
SIMILAR PRECIP CHANCES (10-15%) AGAIN TODAY FOR NE CA AND THE
SIERRA FRONT SOUTH OF I-80. LIKE WE'VE SEEN ALL WEEKEND, WE'LL GET
THOSE CUMULUS BUILDUPS ALONG THE HIGHER TERRAIN WHICH WILL THEN
PUSH EASTWARD DUE TO THE ZEPHYR KICKING IN. SHOWER CHANCES (10%)
SHIFT TO THE SIERRA OF MONO COUNTY ON MONDAY. CONFIDENCE REMAINS
LOW ON ANY SUBSTANTIAL IMPACTS FROM ANY SHOWERS THAT DEVELOP.
FOG POTENTIAL RENEWS FOR SIERRA VALLEYS AGAIN TONIGHT THROUGH
TOMORROW MORNING. FOG DEVELOPMENT WILL BE MORE LOCALIZED TO
TRUCKEE AND THE MARTIS VALLEY AS THE WEAK UPPER LEVEL LOW EXITS
THE REGION AND RIDGING FILLS BACK IN, BRINGING DRIER CONDITIONS. HIGH
TEMPS REACH THE UPPER 80S (VALLEYS) AND UPPER 70S (SIERRA) BY
MID-WEEK. MODERATE HEATRISK IS INTRODUCED TO THE LOWER VALLEYS OF
THE BASIN AND RANGE WEDNESDAY AND FRIDAY. MAKE SURE TO DRINK
PLENTY OF WATER!
THERE'S A SLIGHT SHORTWAVE IN THE UPPER LEVEL PATTERN WEDNESDAY,
WHICH WILL BRING INCREASED AFTERNOON ZEPHYR WINDS. THERE'S A
30-60% CHANCE FOR WIND GUSTS OVER 30 MPH WEDNESDAY. WITH THE WARM
CONDITIONS AND LOW RH VALUES, ISOLATED AREAS OF 2-4 HOURS OF
CRITICAL FIRE WEATHER CONDITIONS ARE LIKELY, ESPECIALLY WHERE
ALREADY DRY FUELS RESIDE.
LONG RANGE GUIDANCE AGREES ON A PATTERN CHANGE THIS WEEKEND, WITH
THE ARRIVAL OF AN UPPER LEVEL TROUGH. HOWEVER, MODELS ARE HAVING
DIFFICULTY PINPOINTING THE LOCATION AND TIMING OF THE LOW. PRECIP
CHANCES WILL BE RESTRICTED TO FAR N WASHOE COUNTY ALONG THE OR
BORDER, WITH THE MAIN CONCERN AREAWIDE BEING GUSTY WINDS. 700 MB
WINDS ARE INCREASING IN RESPONSE TO THE LOW SO, AT THE VERY LEAST,
EXPECT LOCALIZED IMPACTS TO AIR TRAVEL WITH BUMPY FLIGHTS.
ADDITIONAL IMPACTS INCLUDE CHOPPY LAKE WATERS AND FIRE WEATHER
CONCERNS WITH 3-7 HOURS OF CRITICAL FIRE WEATHER CONDITIONS.
-GIRALTE
AVIATION
FOG IS EXPECTED TO REDEVELOP OVERNIGHT AT KTRK/THE MARTIS VALLEY,
LOWERING CIGS/VIS TO IFR/LIFR CONDITIONS AT TIMES BETWEEN 10Z AND
16Z. ELSEWHERE, VFR CONDITIONS AND LIGHT WINDS PREVAIL THROUGH THE
MORNING.
AN INCREASING CUMULUS FIELD SHOULD DEVELOP ALONG HIGHER TERRAIN THIS
AFTERNOON, POSSIBLY OBSCURING MOUNTAINTOPS. OTHERWISE, EXPECT
ANOTHER DAY OF WIDESPREAD VFR CONDITIONS AND BREEZY W/NW WINDS IN
THE AFTERNOON.
-SALAS
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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