Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 232141
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
240 PM PDT THU OCT 23 2014

.SYNOPSIS...HIGH PRESSURE ACROSS THE SOUTHWEST WILL RESULT IN
UNSEASONABLY WARM TEMPERATURES CONTINUING THROUGH SATURDAY. A TROUGH
APPROACHING FROM THE WEST WILL BRING INCREASING WINDS SATURDAY AND
COOLER WEATHER TO THE AREA SUNDAY THROUGH MUCH OF NEXT WEEK.
&&

.SHORT TERM /THROUGH SUNDAY NIGHT/...

HIGH PRESSURE BUILDING IN ACROSS THE SOUTHERN ROCKIES WILL CONTINUE
THIS EXTENDED STRETCH OF WARM/DRY WEATHER THROUGH TOMORROW.
STANDING WAVE CLOUD OVER INYO/ESMERALDA COUNTIES IN THE PROCESS OF
DISSIPATING AS WINDS ALOFT BACK TO A SOUTHWESTERLY DIRECTION WHICH
SHOULD MAKE FOR A CLEAR NIGHT.

SATURDAY WILL BE A TRANSITION DAY AS A TROUGH MOVES INTO NORTHERN
CALIFORNIA WITH RIDGE SHIFTING FURTHER EAST. TEMPERATURES WILL
REMAIN WELL ABOVE NORMAL, HOWEVER WINDS WILL BE ON THE INCREASE
AREAWIDE. MAIN AREA OF CONCERN WILL ALONG THE EASTERN SIERRA SLOPES
AND OWENS VALLEY WHERE DOWNSLOPE WIND POTENTIAL EXISTS. WILL BE
ISSUING A WIND ADVISORY FROM 11 AM SATURDAY THROUGH 5 AM SUNDAY
MORNING. THE WINDS WILL BE STRONGEST NEAR/BELOW CANYON OPENINGS BUT
STRONG CROSSWINDS MAY IMPACT HIGHWAY 395 BETWEEN OLANCHA AND THE
MONO COUNTY LINE. STILL LOOKING AT A WEAKER DOWNSLOPE EVENT IN THE
LEE OF THE SPRING MOUNTAINS SATURDAY NIGHT INTO SUNDAY MORNING WITH
GUSTS TO 40 MPH POSSIBLE. TROUGH PASSAGE LOOKS TO BE MOSTLY DRY
BUT DID KEEP IN A SLIGHT CHANCE MENTION NEAR THE SOUTHERN SIERRA
CREST SATURDAY AFTERNOON/EVENING.

THE TROUGH WILL BE CROSSING THE GREAT BASIN SUNDAY WITH TEMPERATURES
FALLING 10-15 DEGREES AROUND BISHOP AND GOLDFIELD. ELSEWHERE,
READINGS WILL BE ABOUT 10 DEGREES COOLER OR BE NEAR NORMAL. A
SOUTHWEST-WEST BREEZE WILL PERSIST ACROSS THE MOJAVE DESERT AND
NORTHWEST ARIZONA WHILE NORTH WINDS WILL DEVELOP BEHIND A COLD FRONT
IN CENTRAL NEVADA. LOOKS LIKE THE MAIN PUSH OF NORTH WINDS DOES NOT
ARRIVE UNTIL SUNDAY EVENING IN LAS VEGAS, WITH NORTH WINDS
INCREASING DOWN THE COLORADO RIVER VALLEY THROUGH THE NIGHT AS
WELL.

.LONG TERM...MONDAY THROUGH THURSDAY...

AS PACIFIC TROUGH DEPARTS TO OUR EAST ON MONDAY A MUCH COOLER
AIRMASS WILL RESIDE IN ITS WAKE WITH HIGH TEMPERATURES ON MONDAY
AVERAGING SEVERAL DEGREES BELOW NORMAL FOR LATE OCTOBER. EASTERN
PACIFIC RIDGING WILL ATTEMPT TO BUILD INTO THE REGION BY MIDWEEK
WITH HEIGHTS RISING CONSIDERABLY BY WEDNESDAY AFTERNOON. THIS WILL
RESULT IN A GRADUAL WARM UP WITH TEMPERATURES NEAR TO SLIGHTLY ABOVE
NORMAL BY THE MIDDLE TO LATER PORTION OF THE WORKWEEK.

DESPITE THE RIDGING...OCCASIONAL HIGH CLOUDS WILL PERSIST THROUGH
THE WEEK AS DISTURBANCES BRUSH TO OUR NORTH AND SEND SOME DEBRIS
CLOUDINESS ACROSS THE DESERT SOUTHWEST.
&&

.AVIATION...FOR MCCARRAN...EAST WIND AT OR LESS THAN 7 KTS INTO THIS
EVENING BEFORE WINDS RETURN TO SOUTHWEST DIRECTION FOR THE REST OF
THE NIGHT. ON FRIDAY, THE WIND WILL FAVOR A LIGHT EASTERLY COMPONENT
IN THE EARLY AFTERNOON BEFORE SHIFTING SOUTHEASTERLY WITH SPEEDS
INCREASING TO BETWEEN 6-11 KTS IN THE LATE AFTERNOON.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SCT-BKN CIRRUS AOA 25K FT ACROSS THE NORTH WILL SHIFT
EAST LEAVING BEHIND CLEAR SKIES TONIGHT/FRIDAY. SURFACE WINDS SHOULD
REMAIN AT OR BELOW 10KTS NEAR THE AIRFIELDS THROUGH TONIGHT AND
FRIDAY. THE EXCEPTION WOULD BE KBIH WHERE STRONGER SOUTHERLY WINDS
WILL OCCUR FRIDAY.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION IS NOT EXPECTED
THROUGH FRIDAY. SPOTTER REPORTS OF WIND SPEEDS OR DAMAGE WILL BE
NEEDED FROM INYO COUNTY SATURDAY.
&&

$$

SHORT TERM/AVIATION...PIERCE
LONG TERM...OUTLER

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