FXUS65 KVEF 261149
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
350 AM PST THU NOV 26 2009

.SYNOPSIS...A RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE AREA TODAY 
WITH MOSTLY SUNNY SKIES...ABOVE NORMAL TEMPERATURES AND LOCALLY 
GUSTY WINDS DOWN THE COLORADO RIVER. A LOW PRESSURE SYSTEM WILL MOVE 
INTO CENTRAL CALIFORNIA FRIDAY BRINGING INCREASING HIGH CLOUDINESS 
AND SOME SOUTHERLY BREEZES. THIS LOW WILL THEN MOVE TO SOUTHERN 
CALIFORNIA SATURDAY BRINGING CHANCES FOR VALLEY RAIN AND MOUNTAIN 
SNOW.
&&

.SHORT TERM...UPPER RIDGE OVER THE AREA THIS MORNING WILL MOVE 
SLIGHTLY TO THE EAST THIS AFTERNOON WITH SUNNY SKIES AND GENERALLY 
LIGHT WINDS WITH TEMPERATURES A FEW DEGREES ABOVE NORMAL. A LOW 
PRESSURE SYSTEM APPROACHING THE PACIFIC NORTHWEST COAST TODAY WILL 
DEEPEN AND MOVE INTO CENTRAL CALIFORNIA FRIDAY. THIS WILL INCREASE 
SOUTH/SOUTHWEST WINDS A BIT FRIDAY...MAINLY OVER THE HIGHER TERRAIN 
AND ESPECIALLY OVER THE SIERRA. HIGH CLOUDS WILL ALSO BE ON THE 
INCREASE OVER THE AREA BUT ANOTHER MILD DAY CAN BE EXPECTED. MODELS 
ARE IN PRETTY DECENT AGREEMENT WITH THE EVOLUTION OF THE 
LOW...DEEPENING IT FURTHER FRIDAY NIGHT AND SATURDAY AS IT MOVES 
INTO SOUTHERN CALIFORNIA. PRECIPITATION CHANCES WILL SPREAD FROM THE 
SIERRA FRIDAY NIGHT ACROSS MUCH OF THE AREA SATURDAY. STILL QUITE A 
BIT OF UNCERTAINTY AS TO HOW MUCH MOISTURE THIS SYSTEM WILL BE ABLE 
TO TAP BUT AT THIS TIME IT LOOKS LIKE PRECIPITATION AMOUNTS WILL BE 
PRETTY LIGHT OVER THE SOUTHERN GREAT BASIN AND MOHAVE DESERT. MAX 
TEMPERATURES WILL BE SEVERAL DEGREES COOLER SATURDAY WITH THE LOW 
MOVING OVER THE AREA. 

.LONG TERM...FOR SUNDAY MORNING THE 00Z MODELS ARE SHOWING SOMEWHAT 
BETTER CONSENSUS...WITH THE UPPER LOW CENTER PROGGED TO BE DIRECTLY 
SOUTH OF THE AREA JUST SOUTH OF THE BORDER. THE GFS WAS REALLY THE 
ONLY OUTLIER...CENTERING THE LOW OVER ARIZONA. WITH THAT...EXPECT 
SOME WRAP AROUND MOISTURE MAINLY IN THE MID LEVELS ON SUNDAY 
AFTERNOON MAINLY OVER MOHAVE COUNTY...WITH ENOUGH MOISTURE TO 
SUPPORT THE CHANCE FOR A FEW SHOWERS WITH THE PRECIP MIXING WITH OR 
FALLING AS ALL SNOW AT ELEVATIONS ABOVE 6000 FEET. WILL DEFINITELY 
SEE SOME BREEZY CONDITIONS ON SUNDAY AFTERNOON THANKS TO A 
TIGHTENING NORTH/SOUTH GRADIENT AND BAND OF STRONG MIDLEVEL WINDS ON 
THE BACKSIDE OF THE LOW. RIDGING WILL BUILD ACROSS THE AREA MONDAY 
AND TUESDAY...WHICH SHOULD WARM TEMPERATURES SOMEWHAT...BEFORE  
ANOTHER SYSTEM DROPS SOUTH INTO THE PLAINS AND THE STRONG NORTHERLY 
WINDS ON THE BACKSIDE BRING A REINFORCING SHOT OF COLDER AIR TO THE 
REGION NEXT THURSDAY.
&&

.AVIATION...FOR MCCARRAN...SO SIGNIFICANT WEATHER IS EXPECTED WITH 
LIGHT WINDS AND CLEAR SKIES. SOUTHWEST WINDS ARE EXPECTED TO 
INCREASE ON FRIDAY AS APPROACHES FROM THE WEST.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST 
CALIFORNIA...WINDS WILL BE MAINLY LIGHT AND FOLLOW DIURNAL 
DIRECTIONAL TRENDS OVER THE NEXT 24 HOURS...BUT START TO INCREASE AS 
A LOW PRESSURE SYSTEM BEGINS IN FROM THE NORTH...WITH GUSTS OF 15-20 
KTS ACROSS THE SOUTHERN GREAT BASIN BY FRIDAY
&&

.VEF WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
AZ...NONE.
CA...NONE.
&&

$$

HARRISON/KENNEDY

HTTP://WEATHER.GOV/LASVEGAS