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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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