293
FXUS65 KREV 042121
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
221 PM PDT THU SEP 4 2025
KEY MESSAGES
* AFTERNOON THUNDERSTORMS AND ATTENDANT FLASH FLOODING POTENTIAL
CONTINUES THROUGH FRIDAY BEFORE DRYING OUT THIS WEEKEND.
* SMOKE FROM NEARBY WILDFIRES WILL CONTINUE TO FILTER INTO THE
REGION, PRODUCING HAZY SKIES AND AIR QUALITY IMPACTS.
* FALL-LIKE WEATHER ARRIVES NEXT WEEK WITH MUCH COOLER
TEMPERATURES, BREEZY WINDS, AND INCREASED SHOWER AND STORM
CHANCES.
DISCUSSION
ISOLATED SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE
AFTERNOON BEFORE TAPERING OFF AFTER 8-9 PM PDT. AREAS NEAR THE
OREGON BORDER AND IN MONO-MINERAL COUNTIES REMAIN FAVORED FOR T-
STORMS TODAY, BUT THERE IS 10% CHANCE OF STORMS DEVELOPING NEAR THE
TAHOE BASIN AND GREATER RENO-CARSON-MINDEN AREA. FRIDAY AFTERNOON
OFFERS ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS, BUT BEST CHANCES
(20-40%) SHIFT EAST OF THE US-95 CORRIDOR. OTHERWISE, HAZY SKIES
FROM SMOKE DRIFT AND SEASONABLY WARM WEATHER ROUND OUT THE WORK
WEEK.
A NOTABLE CHANGE IN THE WEATHER PATTERN BEGINS THIS WEEKEND AS
ATYPICALLY STRONG LOW PRESSURE TRAVERSES ACROSS THE PACIFIC BASIN.
WINDS BECOME BREEZY THIS WEEKEND AND WILL LIKELY PEAK EARLY NEXT
WEEK, POSING IMPACTS TO TRAVEL AND RECREATION EACH DAY. THERE MAY BE
SOME LOW-END FIRE IMPACTS THIS WEEKEND -- SUCH AS HOLDOVER FIRES
FLARING UP -- BUT HUMIDITY SHOULD REMAIN ABOVE CRITICAL THRESHOLDS
THROUGH NEXT WEEK. A STEADY COOLING TREND BEGINS THIS WEEKEND,
CULMINATING IN FALL-LIKE TEMPERATURES MUCH OF NEXT WEEK. DAYTIME
HIGHS WILL LIKELY BECOME 10-20 DEGREES BELOW NORMAL AFTER THIS
WEEKEND WITH TEMPERATURES POSSIBLY FALLING BELOW FREEZING IN SIERRA
VALLEYS AROUND MIDWEEK. IF THE WIND AND COOLER TEMPERATURES WEREN'T
ENOUGH, CHANCES OF SHOWERS AND T-STORMS ALSO INCREASE MONDAY THROUGH
WEDNESDAY. NEEDLESS TO SAY, IT'S SHAPING UP TO FEEL MUCH MORE LIKE
FALL NEXT WEEK!
-SALAS
AVIATION
THE PRIMARY WEATHER CONCERNS WILL BE SHOWER AND THUNDERSTORM IMPACTS
THIS AFTERNOON, MOST LIKELY AT KMMH WHERE ODDS ARE 20-25%.
ADDITIONAL SHOWERS AND STORMS ARE EXPECTED FRIDAY AFTERNOON, BUT
BEST CHANCES FAVOR KNFL-KLOL. SMOKE FROM UPSTREAM WILDFIRES MAY
CONTINUE TO REDUCE SLANTWISE VISIBILITIES EACH MORNING AND EVENING
INTO THE WEEKEND.
-SALAS
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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