AREA FORECAST DISCUSSION

 
 FXUS65 KVEF 251131
 AFDVEF
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE LAS VEGAS NV
 330 AM PST WED NOV 25 2009
 
 .SYNOPSIS...A RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE AREA 
 THROUGH THURSDAY WITH MOSTLY CLEAR SKIES AND NEAR NORMAL 
 TEMPERATURES. LOCALLY GUSTY WINDS WILL PERSIST DOWN THE COLORADO 
 RIVER. A LOW PRESSURE SYSTEM WILL MOVE INTO THE AREA FRIDAY THROUGH 
 SUNDAY WITH BREEZY CONDITIONS AND A COOLING TREND. 
 &&
 
 .SHORT TERM...AN UPPER RIDGE WILL REMAIN OVER THE AREA INTO THURSDAY 
 WITH MOSTLY CLEAR SKIES AND NEAR NORMAL TEMPERATURES. SURFACE HIGH 
 PRESSURE ROUGHLY OVER NORTHERN UTAH WILL KEEP LOCALLY GUSTY WINDS 
 DOWN THE COLORADO RIVER VALLEY FROM BULLHEAD CITY TO NEEDLES. A LOW 
 PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL APPROACH THE AREA 
 FROM THE WEST ON FRIDAY WITH INCREASING SOUTHWEST WINDS OVER MOST OF 
 THE AREA. TEMPERATURES MAY ACTUALLY INCREASE A FEW DEGREES OVER 
 SOUTHERN ZONES DUE TO BETTER MIXING BUT A COOLING TREND WILL BEGIN 
 IN THE NORTH AS 500MB HEIGHTS FALL ABOUT 120 METERS. MOISTURE WITH 
 THIS SYSTEM WILL STILL BE NORTH OF THE AREA THROUGH FRIDAY.
 
 .LONG TERM...FOR THE PERIOD BEGINNING SATURDAY MORNING...WITH MODELS 
 STILL STRUGGLING TO FIND CONSENSUS REGARDING A TROUGH OF LOW 
 PRESSURE EXPECTED TO IMPACT THE REGION THIS WEEKEND...CHANGES WERE 
 MINIMAL. DID NUDGE THE FORECAST BASED ON A BLEND OF THE EC/GEM 
 SOLUTIONS DUE TO THEIR INDIVIDUAL CONSISTENCY AND THE FACT THAT THE 
 00Z OPERATIONAL GFS WAS DEFINITELY AN OUTLIER AMONG SOLUTIONS. AS THE
 TROUGH DROPS OVER THE AREA ON SATURDAY...THERE WILL BE A SLIGHT 
 CHANCE OF SHOWERS MAINLY OVER THE HIGHER TERRAIN OF SOUTHERN NEVADA 
 AND NORTHWEST ARIZONA...BUT PRECIP   COULD POSSIBLY BE MORE 
 WIDESPREAD ACROSS MOHAVE COUNTY IF THE DEEPER EC SOLUTION VERIFIES.  
 ON THE BACKSIDE OF THE TROUGH...NORTH WINDS WILL USHER IN COOLER 
 TEMPERATURES FOR THE WEEKEND. THE NORTH WIND WILL BE STRONGEST ON 
 SATURDAY AND SUNDAY WITH BREEZY CONDITIONS AT MOST LOCATIONS. WINDS 
 WILL DECREASE AND TEMPERATURES REBOUND EARLY NEXT WEEK AS RIDGE 
 BUILDS OVER THE SOUTHWEST STATES.
 &&
 
 .AVIATION...FOR MCCARRAN...NO SIGNIFICANT WEATHER IS EXPECTED WITH 
 LIGHT WINDS AND CLEAR SKIES.
 
 FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST 
 CALIFORNIA...NORTH WINDS OF 15-25KTS WILL AGAIN DEVELOP DOWN THE 
 LOWER COLORADO RIVER VALLEY AFT 16Z IMPACTING THE AREA BETWEEN KIFP 
 AND KEED...BUT OTHERWISE...NO SIGNIFICANT WEATHER IS EXPECTED. 
 
 .VEF WATCHES/WARNINGS/ADVISORIES...
 NV...NONE.
 AZ...NONE.
 CA...NONE.
 &&
 
 

 
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