486
FXUS65 KVEF 051733
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1033 AM PDT FRI SEP 5 2025
AVIATION DISCUSSION UPDATED FOR THE 18Z TAFS BELOW...
KEY MESSAGES
* MONSOONAL MOISTURE REMAINS IN PLACE TODAY BEFORE SLOWLY RETREATING
EASTWARD OUT OF THE REGION, SHIFTING THE BEST PRECIPITATION
CHANCES FURTHER EAST EACH DAY THROUGH SATURDAY.
* DRY CONDITIONS AND RELATIVELY COOLER TEMPERATURES ARE EXPECTED
TO RETURN NEXT WEEK.
DISCUSSION
TODAY THROUGH THURSDAY.
MOISTURE FROM TROPICAL STORM LORENA WILL CONTINUE TO FUNNEL NORTH
INTO THE DESERT SOUTHWEST TODAY. THE GREATEST MOISTURE WILL SPAN
FROM THE EASTERN HALF OF SAN BERNARDINO COUNTY INTO CLARK AND MOHAVE
COUNTIES TODAY, WITH PWATS BETWEEN 1.25 AND 1.75 INCHES. CURRENTLY
WATCHING A GROUP OF STRONG MULTICELLULAR STORMS SUPPORTED BY A VORT
MAX TRACKING THROUGH SOUTHERN NEVADA AND NORTHWESTERN ARIZONA. SO
FAR THEY HAVE PRODUCED GUSTS IN THE 30 TO 40 MPH RANGE ALONG WITH
FREQUENT LIGHTNING. THESE SHOULD WEAKEN AROUND SUNRISE. ANOTHER
ROUND OF CONVECTION STARTS AROUND 18Z, INITIALLY FAVORING HIGH
TERRAIN BEFORE MOVING INTO THE VALLEYS. SOME GUIDANCE SHOWS
OUTFLOW DRIVEN STORMS IN THE SOUTHERN GREAT BASIN LASTING LATER
INTO THE NIGHT. ONCE AGAIN, BRIEF HEAVY DOWNPOURS AND GUSTY
OUTFLOW WINDS ARE THE MAIN CONCERNS. SOME OF THE STRONGER STORMS
MAY PRODUCE HAIL AS WELL. ANOTHER ROUND OF THUNDERSTORMS IS
FORECAST FOR SATURDAY, BUT THESE ARE EXPECTED TO BE MORE LIMITED
IN MAGNITUDE AND COVERAGE. MOISTURE DECREASES TO THE 1.0 TO 1.5
INCH RANGE AS THE TROUGH AND ASSOCIATED DRY AIR PUSHES IN FROM THE
WEST. A FEW LINGERING STORMS CANNOT BE RULED OUT IN NORTHWESTERN
ARIZONA ON SUNDAY.
A DEEP, EARLY SEASON TROUGH WILL TRACK EAST AND ITS AXIS SHOULD MOVE
INTO THE WEST COAST BY TUESDAY. THE TROUGH WILL CONTINUE TO MAINTAIN
DRY AIR AND ALSO PRODUCE LOWERING HEIGHTS ALOFT, WHICH WILL RESULT
IN A GRADUAL DECREASE IN TEMPERATURES THROUGH THURSDAY. HIGHS SHOULD
BE 5 TO 10 DEGREES BELOW AVERAGE BY WEDNESDAY, WHICH MEANS HIGHS IN
THE LOW 90S IN LAS VEGAS.
AVIATION...FOR HARRY REID...FOR THE 18Z FORECAST PACKAGE
EAST TO OCCASIONALLY SOUTHEAST WINDS TO PERSIST INTO THE
AFTERNOON HOURS WITH SPEEDS GENERALLY 10 KT OR LESS. LOW
CONFIDENCE IN ISOLATED SHRA/TSRA FROM 21Z THROUGH 02Z. WHILE THESE
MAY NOT DIRECTLY IMPACT THE TERMINAL, GUSTY OUTFLOWS MAY. WINDS
TO EVENTUALLY BECOME SOUTHWESTERLY AFTER 00Z, THEN GRADUALLY SHIFT
TO THE NORTHWEST/NORTH OVERNIGHT. OUTSIDE OF THUNDERSTORM
OUTFLOWS, WINDS SHOULD GENERALLY REMAIN 10 KT OR LESS.
TEMPERATURES TO REMAIN BELOW 100 DEGREES THROUGH THE PERIOD.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 18Z FORECAST PACKAGE...ANOTHER DAY OF
ISOLATED SHOWERS/STORMS IS EXPECTED, WHICH COULD RESULT IN GUSTY
OUTFLOWS AT ALL TERMINALS ASIDE FROM KBIH, WHERE DRIER CONDITIONS
PERSIST. WINDS TO GENERALLY REMAIN EAST/SOUTHEAST INITIALLY,
SHIFTING TO A MORE SOUTHERLY DIRECTION LATE THIS AFTERNOON INTO
THE EVENING. WINDS WILL EVENTUALLY TAKE ON A MORE DIURNAL PATTERN
OVERNIGHT EXCEPT WHERE ANY SHOWERS OR STORMS LINGER. KBIH WILL BE
THE ONE EXCEPTION TO THIS, WHERE GUSTY UP-VALLEY BREEZES CAN BE
EXPECTED THROUGH 00Z TO 03Z BEFORE SHIFTING BACK TO THE NORTHWEST.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...MELTZER
AVIATION...AUSTIN
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