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FXUS65 KVEF 121839
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1139 AM PDT FRI SEP 12 2025
KEY MESSAGES
* OUTSIDE OF ISOLATED SHOWERS AND THUNDERSTORMS IN THE SIERRA AND
SOUTHWESTERN GREAT BASIN THIS AFTERNOON, WEATHER ACROSS THE
REGION WILL REMAIN DRY AND RELATIVELY BENIGN THROUGH THE WEEKEND
AND INTO NEXT WEEK.
DISCUSSION
THROUGH THURSDAY.
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE IN THE MOUNTAINS OF INYO
AND ESMERALDA COUNTIES THIS AFTERNOON AS THE LOW PRESSURE SYSTEM
RESPONSIBLE FOR OUR COOLER THAN NORMAL TEMPERATURES SWINGS THROUGH
THE GREAT BASIN TODAY. 500 MB HEIGHTS WILL BEGIN TO RISE AS THIS
TROUGH EXITS THE REGION AND RIDGING BEGINS TO BUILD BACK IN OVER THE
WEEKEND. THIS RIDGE WILL PERSIST THROUGH THE MIDDLE OF NEXT WEEK,
ALLOWING FOR TEMPERATURES TO GRADUALLY WARM BACK UP TO NORMAL. WITH
HIGH PRESSURE OVERHEAD, WEATHER WILL REMAIN MILD WITH DRY CONDITIONS
ACROSS SOUTHERN NEVADA, SOUTHEASTERN CALIFORNIA, AND NORTHWEST
ARIZONA. TEMPERATURES WILL PEAK ON THURSDAY, COOLING FRIDAY INTO THE
WEEKEND. THE MAGNITUDE OF THIS COOLING WILL DEPEND ON THE STRENGTH
OF AN INCOMING TROUGH AND A POTENTIAL INCREASE IN CLOUD COVER AS
MOISTURE ATTEMPTS TO CREEP BACK INTO THE AREA.
AVIATION...FOR HARRY REID...FOR THE 18Z FORECAST PACKAGE
WINDS
WILL GENERALLY REMAIN LESS THAN 8 KNOTS THROUGH THE DAY, WITH LIGHT
AND VARIABLE WINDS SETTLING IN FROM THE EAST DURING THE AFTERNOON.
WINDS WILL SWING AROUND TO THE WEST-SOUTHWEST IN A TYPICAL DIURNAL
FASHION AFTER SUNSET THIS EVENING. WINDS WILL BECOME LIGHT AND
VARIABLE AGAIN EARLY TOMORROW MORNING AS THEY BEGIN TO TRANSITION
BACK TO A MORE EASTERLY DIRECTION. VFR CONDITIONS WILL PREVAIL
THROUGH THE TAF PERIOD.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 18Z FORECAST PACKAGE...ISOLATED SHOWERS AND
THUNDERS WILL RETURN TO THE SIERRA AND OWENS VALLEY THIS AFTERNOON
WITH A 20% CHANCE OF ANY IMPACTS AT KBIH. LIGHTNING, SUDDEN GUSTY
WINDS, AND CIGS TO 8000FT WOULD BE POSSIBLE WITH ANY STORMS.
ELSEWHERE IT WILL REMAIN DRY. WINDS SHOULD REMAIN LIGHT IN MOST
LOCATIONS, THOUGH GUSTS TO AROUND 20KT ARE POSSIBLE THIS AFTERNOON
IN THE COLORADO RIVER VALLEY. ANY ELEVATED WINDS THAT DO DEVELOP
THIS AFTERNOON WILL QUICKLY END AROUND SUNSET.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION/AVIATION...STESSMAN
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