707
FXUS65 KVEF 240449
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
949 PM PDT WED APR 23 2025
SYNOPSIS
A SERIES OF SHORTWAVES WILL MOVE ACROSS THE SOUTHERN
GREAT BASIN THROUGH THE END OF THE WEEK, RESULTING IN BREEZY
AFTERNOONS AND DECREASING TEMPERATURES. A STRONGER AREA OF LOW
PRESSURE WILL SWING ACROSS THE REGION OVER THE WEEKEND, BRINGING
BELOW NORMAL TEMPERATURES ALONG WITH A SLIGHT CHANCE OF
PRECIPITATION OVER NORTHERN AREAS. TEMPERATURES WILL RETURN TO NEAR
TO ABOVE NORMAL LEVELS EARLY NEXT WEEK.
UPDATE
SHORTWAVE OVER THE NORTHERN GREAT BASIN REDUCED OUR
HEIGHTS SLIGHTLY TODAY WITH REGIONAL HIGH TEMPERATURES RESPONDING
WITH A FEW DEGREES OF COOLING COMPARED TO YESTERDAY. THIS SHORTWAVE
WILL LIFT INTO THE NORTHERN ROCKIES TONIGHT BUT A SECOND, STRONGER
SHORTWAVE WILL APPROACH THE WEST COAST BY TOMORROW AFTERNOON,
KEEPING HIGH TEMPERATURES SIMILAR TO TODAY AND KEEPING THE
SOUTHWESTERLY BREEZES GOING. THE CURRENT FORECAST IS IN GOOD SHAPE
AND NO UPDATE IS NECESSARY.
-OUTLER-
SHORT TERM
THROUGH THURSDAY.
A SHORT WAVE PASSING ACROSS THE CENTRAL GREAT BASIN THIS AFTERNOON
THROUGH TONIGHT WILL MAINLY RESULT IN AN INCREASE IN MID AND HIGH-
LEVEL CLOUDS, ALTHOUGH A FEW AREAS OF VIRGA MAY ALSO BE SEEN. NO
PRECIPITATION IS EXPECTED TO REACH THE GROUND, EXCEPT FOR THE
HIGHEST PEAKS NORTH OF THE VEGAS VALLEY, WHERE AN ISOLATED SHOWER
WILL BE POSSIBLE. BREEZY SOUTH TO SOUTHWEST WINDS WILL ALSO BE SEEN
ACROSS THE AREA, WITH THE STRONGEST WINDS (20 TO 30 MPH), BOTH THIS
AFTERNOON AND AGAIN TOMORROW AFTERNOON, BEING SEEN ACROSS THE
WESTERN MOJAVE DESERT AND SOUTHERN INYO COUNTY. AS THE SHORT WAVE
PASSES, HEIGHTS WILL FALL SLIGHTLY, RESULTING IN TEMPERATURES AT THE
SURFACE COOLING A FEW DEGREES TODAY AND AGAIN TOMORROW.
LONG TERM
FRIDAY THROUGH WEDNESDAY.
A FAIRLY DEEP TROUGH WILL TAKE SHAPE OFF THE WEST COAST ON FRIDAY
AND SHIFT INLAND OVER THE WEEKEND. OVERALL, ENSEMBLE AGREEMENT HAS
COME INTO PRETTY GOOD AGREEMENT ON THE GENERAL IDEA WITH THIS
SYSTEM, THOUGH THERE REMAINS SOME UNCERTAINTY ABOUT HOW QUICKLY THE
SYSTEM DEPARTS EARLY NEXT WEEK. NONETHELESS, GUSTY WINDS WILL
OVERSPREAD MUCH OF THE REGION FRIDAY AND SATURDAY IN ADVANCE OF THE
TROUGH, ALONG WITH SHARPLY COOLER TEMPERATURES SATURDAY AND SUNDAY.
PRECIPITATION EXPECTATIONS REMAIN FAIRLY LIMITED, WITH THE BEST
CHANCE FOR LIGHT RAIN AND HIGH ELEVATION SNOW POSSIBLE IN THE SIERRA
AND SOUTHERN GREAT BASIN. HOWEVER, COLD AIR ALOFT UNDER THE TROUGH
AXIS OVER THE WEEKEND COULD RESULT IN AT LEAST SOME ISOLATED TERRAIN-
DRIVEN SHOWERS AS FAR SOUTH AS LAS VEGAS, SO TRENDS WILL CONTINUE TO
BE MONITORED FOR ANY NECESSARY BUMPS IN PRECIP CHANCES.
BY EARLY NEXT WEEK, HEIGHTS WILL GRADUALLY RISE AS THE WEEKEND
TROUGH DEPARTS. AS MENTIONED PREVIOUSLY, HOW QUICKLY IT DEPARTS
REMAINS A LITTLE UNCERTAIN, BUT A GENERAL WARMING TREND IS STILL
LIKELY TO BEGIN MONDAY, AND TEMPERATURES RETURNING TO NEAR NORMAL OR
SLIGHTLY ABOVE NORMAL BY MIDWEEK.
AVIATION...FOR HARRY REID...FOR THE 06Z FORECAST PACKAGE
WINDS
GENERALLY REMAIN SOUTHWESTERLY THROUGH THE FORECAST PERIOD.
SUSTAINED SPEEDS TONIGHT ARE EXPECTED TO REMAIN AROUND 10KT OR
LESS UNTIL AROUND 10Z, WHEN HIGH-RESOLUTION GUIDANCE INDICATES A
BRIEF UPTICK IN WINDS TO AROUND 12-14KT WITH INTERMITTENT HIGHER
GUSTS POSSIBLE. PROBABILITIES FOR GUSTS OF 20KT REMAIN VERY LOW
OVERNIGHT, THOUGH A FEW GUSTS TO 15-19KT CAN BE EXPECTED. AROUND
DAYBREAK, GUSTS DIMINISH BEFORE RETURNING ONCE AGAIN BY EARLY
AFTERNOON, WITH A 50% PROBABILITY FOR WIND GUSTS TO REACH 20KT
THROUGH SUNSET. VFR CONDITIONS WILL PREVAIL, WITH PASSING HIGH
CLOUDS THROUGH THE PERIOD AND AN UPTICK IN MID CLOUDS AROUND 15KFT
AFTER 25/00Z.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...KVGT AND KHND FOLLOW
SIMILAR TRENDS TO KLAS, WITH MAINLY SOUTHWESTERLY WINDS THE NEXT
24 HOURS, EXCEPT FOR A BRIEF PERIOD OF DIURNAL WINDS AT KVGT LATE
TONIGHT THROUGH THURSDAY MORNING. GUSTS TO AROUND 20-25KT ARE
EXPECTED TO RETURN BY EARLY AFTERNOON, DIMINISHING AFTER SUNSET.
KBIH WILL SEE NORTHWESTERLY WINDS THROUGH EARLY THURSDAY
AFTERNOON, WHEN GUSTY UP-VALLEY WINDS ARE EXPECTED WITH GUSTS TO
AROUND 20KT THROUGH THE EVENING. AT KDAG, WINDS WILL VARY BETWEEN
SOUTHWEST AND WEST-NORTHWEST, WITH SUSTAINED SPEEDS AROUND 12-17KT
AND GUSTS TO 25-30KT OVERNIGHT TONIGHT AND ONCE AGAIN THURSDAY
AFTERNOON AND EVENING. IN THE LOWER COLORADO RIVER VALLEY, KEED
AND KIFP, WINDS AROUND 10KT OR LESS ARE EXPECTED THROUGH THURSDAY
MORNING, WITH A RETURN OF GUSTY SOUTHERLY WINDS EXPECTED AT BOTH
TERMINALS BETWEEN 18-21Z. GUSTS TO AROUND 20KT ARE EXPECTED, WITH
GUSTS DIMINISHING AFTER SUNSET. VFR CONDITIONS WILL PREVAIL
AREAWIDE, WITH PERIODIC MID AND HIGH CLOUDS.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
UPDATE...OUTLER
SHORT TERM...PLANZ
LONG TERM...OUTLER
AVIATION...PHILLIPSON
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