737
FXUS65 KVEF 210446
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
845 PM PST THU FEB 20 2025
SYNOPSIS
GUSTY NORTH WINDS CONTINUE TODAY AND TOMORROW, STRONGEST
IN THE LOWER COLORADO RIVER VALLEY. AS HIGH PRESSURE BUILDS THIS
WEEKEND AND NEXT WEEK, CALMER AND UNSEASONABLY WARM CONDITIONS TAKE
HOLD.
UPDATE
WIND SPEEDS HAVE SUBSIDED THIS EVENING, WITH CURRENT
SPEEDS GENERALLY BETWEEN 10 AND 20 MPH. STRONGEST SPEEDS WILL FOCUS
ALONG THE COLORADO RIVER VALLEY LATER TONIGHT INTO FRIDAY MORNING AS
A SECONDARY VORTICITY MAXIMA PASSES THROUGH THE FORECAST AREA AND
FURTHER TIGHTENS PRESSURE GRADIENTS. WINDS LOOK TO REMAIN SUB-WIND
ADVISORY, BUT WAVE HEIGHTS ON LAKE MOHAVE COULD RANGE FROM 1 TO 2
FEET, SO BOATING FOR SMALL CRAFT IS NOT RECOMMENDED. NO CHANGES MADE
TO THE FORECAST THIS EVENING, AS IT REMAINS IN GOOD SHAPE.
PREVIOUS DISCUSSION
223 PM PST THU FEB 20 2025/
DISCUSSION
THROUGH WEDNESDAY.
WINDS HAVE BEGUN TO WEAKEN SLIGHTLY IN THE LAS VEGAS VALLEY AFTER
OVER-PERFORMING EXPECTATIONS THIS MORNING. PEAK GUSTS WERE GENERALLY
IN THE 30-40 MPH RANGE ACROSS MUCH OF THE AREA, BUT HARRY REID
GUSTED TO 40-45 MPH SEVERAL TIMES. WINDS AROUND THE REGION SHOULD
CONTINUE TO GRADUALLY WANE INTO THE EVENING, BUT WE'LL SEE SOME
REINVIGORATION OF THE NORTHERLY BREEZES TONIGHT AND TOMORROW AS A
SECONDARY VORT MAX DROPS SOUTH THROUGH THE GREAT BASIN. STRONGEST
WINDS FROM THIS WILL BE IN THE LOWER COLORADO RIVER VALLEY, WITH
GUSTS 30-40 MPH EXPECTED. LATEST HREF HIGHLIGHTS THE LAUGHLIN AREA
WITH A 30% CHANCE OF 40+ MPH GUSTS FRIDAY MORNING. WITH THE
STRONGEST WINDS FOCUSED BETWEEN LAKE MOHAVE AND LAKE HAVASU, AND
THE LIMITED SPATIAL AND TEMPORAL WINDOW FOR 40+ MPH GUSTS (IF THEY
OCCUR AT ALL), WON'T BE ISSUING ANY WIND HEADLINES. HOWEVER,
ANYONE ON THE LOCAL LAKES TODAY AND TOMORROW SHOULD BE PREPARED
FOR INCREASED WAVE ACTIVITY.
AS WE HEAD INTO THE WEEKEND, A BROAD 500MB RIDGE BEGINS TO BUILD
OVER MOST OF THE WESTERN US. THIS DRIVES TEMPERATURES WELL ABOVE
NORMAL FOR LATE FEBRUARY. BY TUESDAY, ENSEMBLES SHOW A SHORTWAVE
MOVING INTO THE PACNW AND FLATTENING THE RIDGE. WHILE 500MB HEIGHTS
FALL SLIGHTLY, ANY COOLING THIS INDUCES IS AT LEAST INITIALLY OFFSET
BY ENHANCED VERTICAL MIXING DUE TO A SLIGHT UPTICK IN BREEZES.
TUESDAY'S HIGHS IN LAS VEGAS WILL BE PUSHING 80 DEGREES WHILE PLACES
LIKE DEATH VALLEY AND LAKE HAVASU WILL BE AROUND 90 DEGREES.
HOWEVER, IT APPEARS THAT COLD AIR ADVECTION INDUCED BY THE NORTHERLY
BREEZES BEGINS TO WIN OUT ON WEDNESDAY, WITH FORECAST HIGHS DROPPING
A FEW DEGREES FROM TUESDAY.
AVIATION...FOR HARRY REID...FOR THE 06Z FORECAST PACKAGE
THE
WINDS SHOULD BECOME MORE IN THE 340-010 FOR THE REST OF THE NIGHT
AND BE AT OR BELOW 10 KTS AND THEN SETTLE TO A NORTHEAST DIRECTION
BY EARLY AFTERNOON ON FRIDAY. WINDS WILL BE LIGHT AND DIURNALLY
DRIVEN FRIDAY NIGHT AND SATURDAY. NO OPERATIONALLY SIGNIFICANT
CLOUDS OR WEATHER EXPECTED.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...FOR THE 06Z FORECAST PACKAGE...FOR THE LAS VEGAS VALLEY
TAF SITES, LOOK FOR NORTHWEST TO NORTH WINDS OVERNIGHT WITH SPEEDS
AROUND 10 KTS. GUSTY WINDS ARE EXPECTED TO PERSIST DOWN THE LOWER
COLORADO RIVER VALLEY OVERNIGHT WITH SPEEDS BETWEEN 10-20 KTS. WINDS
AT KDAG WILL GRADUALLY BECOME LIGHT AND VARIABLE. NORTHWEST WINDS
UNDER 10 KTS ARE EXPECTED AT KBIH OVERNIGHT AND BECOME LIGHT
VARIABLE DURING THE DAY ON FRIDAY. NO OPERATIONALLY SIGNIFICANT
CLOUDS OR WEATHER EXPECTED THROUGH FRIDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
DISCUSSION...WOODS
AVIATION...CZYZYK
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