315
FXUS65 KVEF 080826
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
126 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 06Z FORECAST PACKAGE
WINDS
WILL FOLLOW TYPICAL DAILY DIRECTIONAL PATTERNS THROUGH THE
FORECAST PERIOD, VEERING TO THE NORTHEAST BY MID- TO LATE MORNING,
THEN GRADUALLY TO THE SOUTHEAST AND SOUTHWEST BY LATE AFTERNOON.
WIND SPEEDS ARE EXPECTED TO REMAIN UNDER 10KT, WITH VFR CONDITIONS
PREVAILING. TEMPERATURES TUESDAY WILL REMAIN JUST UNDER 100
DEGREES.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...WINDS WILL FOLLOW
TYPICAL DAILY DIRECTIONAL PATTERNS OVER THE NEXT 24 HOURS, WITH
SPEEDS AROUND 5-10KT. VFR CONDITIONS WILL PREVAIL, WITH PASSING
BANDS OF CLOUDS WITH BASES AT OR ABOVE 12KFT.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...NICKERSON/SOULAT
AVIATION...PHILLIPSON
FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:
HTTPS://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
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