581
FXUS65 KVEF 081036
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
336 AM PDT TUE SEP 8 2026
KEY MESSAGES
* ABOVE-NORMAL TEMPERATURES EXPECTED MID-TO-LATE WEEK.
* BREEZY SOUTH-SOUTHWESTERLY WIND GUSTS EXPECTED ACROSS THE REGION
FRIDAY THROUGH THE WEEKEND.
DISCUSSION
TODAY THROUGH MONDAY.
AN ELONGATED AREA OF HIGH PRESSURE WILL BUILD OVER THE REGION
THROUGH THE WEEK, WHICH WILL RESULT IN WARMING TEMPERATURES
TEMPERATURES. BY WEDNESDAY, TEMPERATURES WILL CLIMB TO ABOVE-
NORMAL LEVELS AND THEN REMAIN ABOVE-NORMAL THROUGH AT LEAST
SATURDAY. THE HEAT WILL PEAK ON THURSDAY AS HEATRISK REACHES
MAJOR IN DESERT VALLEYS WITH THE AFOREMENTIONED HIGH CENTERED
OVERHEAD. AS A RESULT, AN EXTREME HEAT WARNING HAS BEEN ISSUED FOR
THURSDAY FOR DEATH VALLEY, THE LAS VEGAS VALLEY, PAHRUMP VALLEY,
MOAPA VALLEY, COLORADO RIVER VALLEY, SOUTHERN MOHAVE COUNTY, AND
SOUTHEASTERN SAN BERNARDINO COUNTY. LATE-WEEK INTO THE WEEKEND,
TEMPERATURES WILL GRADUALLY COOL, WITH MINOR-TO-MODERATE HEATRISK
IN MANY LOCATIONS. DESPITE THE HIGH OVER THE SOUTHWEST US, THE
FLOW WILL NOT BE FAVORABLE FOR MONSOONAL MOISTURE TO RETURN TO THE
REGION AND GENERALLY A DRY FORECAST IS EXPECTED. HOWEVER, WEAK
MOISTURE SQUISHED UNDER THE UPPER-LEVEL RIDGE COULD PRODUCE
ISOLATED THUNDERSTORMS IN THE SIERRA AND TERRAIN OF THE SOUTHERN
GREAT BASIN WEDNESDAY AND THURSDAY DUE TO STRONG DAYTIME HEATING
AND WEAK UPSLOPE FLOW. CONFIDENCE IN CONVECTIVE DEVELOPMENT AND
PLACEMENT IS LOW AT THIS TIME.
DECENT MODEL AGREEMENT THAT AN UPPER-LEVEL TROUGH WILL PUSH THROUGH
THE PACIFIC NORTHWEST TOWARD THE END OF THE WEEK. WHILE THE SYSTEM
WILL REMAIN TOO FAR NORTH TO RESULT IN PRECIPITATION OVER THE
REGION, AN INCREASING PRESSURE GRADIENT WILL BRING BREEZY SOUTH-TO
SOUTHWEST-WINDS TO THE REGION. WIDESPREAD GUSTS 25-35 MPH ARE
EXPECTED, WITH OVER A 50% CHANCE OF GUSTS OVER 40 MPH IN THE
WESTERN MOJAVE DESERT FRIDAY AND SATURDAY. THERE IS ALSO A SIGNAL
FOR ENHANCED SOUTHERLY WINDS UP THE COLORADO RIVER VALLEY, PEAKING
ON SATURDAY, WHICH COULD IMPACT BOATERS WITH WINDS AND WAVES.
AVIATION...FOR HARRY REID...FOR THE 12Z FORECAST PACKAGE
WINDS
WILL GENERALLY FOLLOW TYPICAL DIURNAL DIRECTIONAL TRENDS THROUGH THE
TAF PERIOD, WITH SPEEDS LESS THAN 10 KTS. CANNOT COMPLETELY RULE OUT
AN ISOLATED GUST TO 15 KTS WITH THE HEATING OF THE DAY. NO
OPERATIONALLY SIGNIFICANT CLOUD COVER. THERE IS A 25 PERCENT CHANCE
OF TEMPERATURES REACHING 100 DEGREES THIS AFTERNOON WITH A HIGH
TEMPERATURE FORECAST OF 99.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 12Z FORECAST PACKAGE...WINDS WILL GENERALLY
FOLLOW TYPICAL DAILY DIRECTIONAL PATTERNS THROUGH THE TAF PERIOD,
WITH SPEEDS LESS THAN 10 KTS. NO OPERATIONALLY SIGNIFICANT CLOUD
COVER.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...NICKERSON/SOULAT
AVIATION...SOULAT
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