AREA FORECAST DISCUSSION

 
 FXUS65 KPSR 232140
 AFDPSR
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE PHOENIX AZ
 245 PM MST TUE SEP 23 2008
 
 SOUTH-CENTRAL AND SOUTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA 
 FORECAST DISCUSSION
 
 .SYNOPSIS...
 MOSTLY CLEAR SKIES AND ABOVE NORMAL TEMPERATURES WILL CONTINUE 
 THROUGH THE WEEKEND AS HIGH PRESSURE ALOFT WILL BUILD OVER NEW 
 MEXICO. BREEZY CONDITIONS FROM THE EAST CAN BE EXPECTED IN 
 SOUTH-CENTRAL ARIZONA INCLUDING THE GREATER PHOENIX AREA WEDNESDAY 
 NIGHT THROUGH FRIDAY MORNING.
 
 &&
 
 DISCUSSION...
 SOME RESIDUAL MOISTURE STILL REMAINS OVER SOUTH-CENTRAL ARIZONA...AS 
 SURFACE DEWPOINTS THIS AFTERNOON REMAIN IN THE MID 40S TO MID 50S. 
 VISIBLE SATELLITE IMAGERY INDICATES SOME LOW TOPPED CUMULUS FORMING 
 OVER THE SOUTHEASTERN QUADRANT OF ARIZONA. HOWEVER...CONDITIONS ARE 
 STILL TOO DRY FOR ANY THUNDERSTORM DEVELOPMENT. 
 
 BY THURSDAY...SURFACE HIGH PRESSURE WILL STRENGTHEN TO THE 
 EAST...LEADING TO A TIGHT SURFACE PRESSURE GRADIENT ACROSS 
 SOUTH-CENTRAL ARIZONA. EAST TO SOUTHEASTERLY WINDS WILL PICK UP 
 WEDNESDAY MORNING AND THURSDAY MORNING ACROSS SOUTH-CENTRAL 
 ARIZONA...WITH A FEW GUSTS IN THE 20-25 MPH RANGE. 
 
 ALL MODELS ARE IN GOOD AGREEMENT THAT HOT AND DRY CONDITIONS WILL 
 CONTINUE THROUGH THE WEEKEND. BROAD UPPER LEVEL RIDGE CENTERED TO 
 THE EAST OF OUR CWA WILL KEEP TEMPERATURES ABOVE 100 DEGREES FOR 
 MANY LOWER DESERT LOCATIONS. A WEAK PACIFIC DISTURBANCE WILL PASS TO 
 THE NORTH EARLY NEXT WEEK...ALLOWING HIGH TEMPERATURES TO BACK OFF A 
 FEW DEGREES. NO SIGNIFICANT CHANGES IN THE WEATHER PATTERN ARE 
 EXPECTED.
 
 &&
 
 .AVIATION...
 LIGHT WINDS AND FEW TO NO CLOUDS CAN BE EXPECTED INTO WEDNESDAY 
 MORNING AT ALL TAF SITES.
 
 AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS.
 
 &&
 
 .FIRE WEATHER...
 THURSDAY THROUGH MONDAY...HIGH PRESSURE WILL CONTINUE TO BUILD OVER 
 THE AREA. WINDS WILL PICK UP SLIGHTLY ON THURSDAY. RELATIVE HUMIDITY 
 WILL REMAIN LOW THROUGH THE PERIOD WITH TEMPERATURES ABOVE NORMAL 
 THROUGH SATURDAY AND RETURNING TO NORMAL LEVELS BY MONDAY.
 
 &&
 
 .PSR WATCHES/WARNINGS/ADVISORIES...
 
 AZ...NONE.
 
 CA...NONE.
 
 &&
 
 $$
 
 NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT
 
 WEATHER.GOV/PHOENIX
 
 DISCUSSION...ROGERS
 AVIATION...WATERS
 FIRE WEATHER...WATERS
 
 
 
 

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