172 
FXUS65 KPSR 310947
AFDPSR
AZZ020>028-CAZ030>033-311745-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ 
245 AM MST TUE DEC 31 2002

.SYNOPSIS...
HIGH PRESSURE WILL BE THE DOMINANT WEATHER INFLUENCE OVER THE REGION 
FOR THE REST OF THE WEEK...AND THROUGH THE WEEKEND. FROM TIME TO 
TIME...NAMELY TODAY AND FRIDAY...WEAK WEATHER DISTURBANCES WILL PASS 
TO THE NORTH BRINGING VARYING AMOUNTS OF HIGH CLOUDS...ACCOMPANIED 
BY LOCAL BREEZINESS. THE HIGH PRESSURE AREA WILL BRING SOME WARMING 
TO THE REGION. AFTERNOON TEMPERATURES ARE ANTICIPATED TO CLIMB 
SLIGHTLY ABOVE NORMAL BY THURSDAY...INCREASING TO WELL ABOVE NORMAL 
SUNDAY AND MONDAY AS THE HIGH PRESSURE AREA BECOMES STRONGER. 

.DISCUSSION...
RIDGE WHICH WAS OVER AZ YESTERDAY HAS NOW BEEN PUSHED EAST AND 
FLATTENED BY WEAK TROF WITH VORTMAX OVER CENTRAL CA EARLY THIS 
MORNING. THIS WEAK TROF WILL BRUSH BY NORTHERN AZ TODAY AND TONIGHT. 
AS IT DOES IT WILL BRUSH SOME PATCHY MID/HI LEVEL MOISTURE THRU SE 
CA / SW AZ BUT SKIES TO REMAIN MOSTLY TO PARTLY SUNNY TODAY. AS THIS 
TROF MOVES INTO THE CENTRAL PLAINS WED...A RIDGE RE-DEVELOPS OVER 
THE SW STATES WITH FURTHER INTENSIFICATION THURS. THIS WILL BRING 
MOSTLY CLEAR SKIES TO THE REGION. THE INTENSIFING RIDGE IS HALTED ON 
FRI CAUSING THE FLOW OVER THE REGION TO BECOME A BIT MORE WESTERLY 
AS A WEAK TROF MOVES ACROSS THE NORTHERN ROCKIES. THIS MAY BRING 
SOME STREAKS OF HIGH CLOUDS TO OUR REGION...SO SKIES WILL CONTINUE 
TO BE MOSTLY CLEAR. THIS BRIEF SLIGHT HALT TO THE BUILDING RIDGE ON 
FRI IS PASSED BY SAT SO OVER THE WEEKEND THE RIDGES BUILDING 
CONTINUES OVER THE REGION AGAIN. WITH THE BUILDING RIDGE OVER THE 
REGION...TEMPS WILL BECOME WARMER ESPECIALLY TOWARD THE END OF THE 
WEEK AND THE WEEKEND.   A SURFACE HIGH IN UT WILL BRING A LITTLE 
TIGHTENING OF THE PRESSURE GRADIENT ACROSS THE LOWER CO RIVER VALLEY 
RESULTING IN SOME BREEZINESS ON WED/WED NIGHT. DKS


.PSR...NONE.