874
FXUS65 KVEF 140534
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1034 PM PDT SAT SEP 13 2025
KEY MESSAGES
* HIGH PRESSURE BUILDING OVER THE SOUTHWEST WILL ALLOW FOR DRY, MILD
WEATHER AND INCREASING TEMPERATURES THROUGH THE MIDDLE OF NEXT
WEEK.
* MOISTURE LOOKS TO RETURN TO THE REGION LATE NEXT WEEK, BRINGING
INCREASED CLOUD COVER AND PRECIPITATION CHANCES WITH IT.
DISCUSSION
THROUGH FRIDAY.
RIDGING WILL SLOWLY BUILD IN OVER THE REGION IN THE WAKE OF THE LOW
PRESSURE SYSTEM RESPONSIBLE FOR THE COOLER THAN NORMAL TEMPERATURES
OF THE PAST FEW DAYS. AS 500 MB HEIGHTS RISE, TEMPERATURES WILL
BEGIN TO GRADUALLY INCREASE AS WE HEAD INTO NEXT WEEK WITH
TEMPERATURES RETURNING TO NORMAL BY THE MIDDLE OF THE WEEK. IN
ADDITION TO WARMING TEMPERATURES, DRY CONDITIONS AND MILD WEATHER
ARE ON TAP FOR SOUTHERN NEVADA, NORTHWESTERN ARIZONA, AND
SOUTHEASTERN CALIFORNIA THROUGH MID-WEEK THANKS TO THE UPPER-LEVEL
RIDGE.
WHILE RIDGING BUILDS OVER THE AREA EARLY NEXT WEEK, WEAK CUT-OFF LOW
WILL BEGIN TO DEVELOP OFF THE COAST OF SOUTHERN CALIFORNIA AND THE
REMNANT CIRCULATION THAT WAS FORMERLY TROPICAL STORM MARIO WILL
CONTINUE TO DRIFT NORTHWEST. BY MID-TO-LATE WEEK, MOISTURE FROM THE
REMNANTS OF MARIO WILL HAVE MADE IT FAR ENOUGH NORTH FOR MOISTURE TO
BE ADVECTED INTO THE SOUTHWESTERN US BY THE SOUTH-SOUTHWESTERLY
UPPER-LEVEL FLOW RESULTING FROM LOW PRESSURE SYSTEM OFF THE COAST OF
CALIFORNIA. THIS INCREASE IN MOISTURE WILL RESULT IN INCREASING
CLOUD COVER DURING THE DAY ON WEDNESDAY AND INCREASING
PRECIPITATION CHANCES BEGINNING THURSDAY. 500 MB HEIGHTS WILL FALL
AS THE LOW OFF THE COAST OF CALIFORNIA BEGINS TO INCH CLOSER TO THE
COAST. THIS WILL RESULT IN COOLER THAN NORMAL TEMPERATURES RETURNING
TO THE REGION AS WE HEAD INTO THE WEEKEND.
AVIATION...FOR HARRY REID...FOR THE 06Z FORECAST PACKAGE
WIND
DIRECTION WILL FOLLOW TYPICAL DIURNAL PATTERNS THROUGH THE
FORECAST PERIOD, VEERING FROM THE SOUTHWEST TONIGHT TO THE
SOUTHEAST SUNDAY AFTERNOON. THESE SOUTHEASTERLY WINDS WILL
INCREASE TO AROUND 10KT BEFORE DIMINISHING AND VEERING TO THE
SOUTHWEST AFTER SUNSET. VFR CONDITIONS WILL PREVAIL WITH
TEMPERATURES REMAINING UNDER 100 DEGREES.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...ACROSS THE REGION,
WINDS WILL GENERALLY FOLLOW TYPICAL DIURNAL PATTERNS THE NEXT 24
HOURS, WITH SUSTAINED SPEEDS REMAINING AROUND 10KT OR LESS.
SLIGHTLY STRONGER WINDS ARE EXPECTED ACROSS THE WESTERN MOJAVE
DESERT, WHERE SUSTAINED SPEEDS WILL BE CLOSER TO 10-12KT. VFR
CONDITIONS PREVAIL AREAWIDE.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...STESSMAN
AVIATION...PHILLIPSON
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