000 
FXUS65 KPSR 112149
AFDPSR
AZZ020>028-CAZ030>033-120545-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
245 PM MST MON MAR 11 2002

.SYNOPSIS...
A BROAD RIDGE OF HIGH PRESSURE OVER THE SOUTHWESTERN STATES WILL 
KEEP MOSTLY CLEAR SKIES AND ABOVE NORMAL TEMPERATURES THROUGH 
WEDNESDAY. A LOW PRESSURE AREA FROM THE PACIFIC NORTHWEST WILL MOVE 
OVER SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA ON THURSDAY. IT WILL 
BRING MUCH COOLER AND WINDY WEATHER WITH PARTLY CLOUDY SKIES TO THE 
REGION...WHICH WILL CONTINUE INTO THE WEEKEND. TEMPERATURES WILL 
BEGIN TO RECOVER SLIGHTLY ON MONDAY.   

.DISCUSSION...
UPPER RIDGE EXTENDING FROM SOUTHERN CA UP THROUGH GREAT BASIN THIS 
AFTERNOON WILL CONTINUE TO SHIFT EAST OVER AZ BY TUES...SHIFTING 
FLOW ALOFT FROM NW TO W. MODELS KEEP AIRMASS DRY WITH MOST OF THE 
HIGH CLOUDS KEEPING NORTH OF SE CA / SW AZ. HOWEVER...SOME HIGH 
CLOUD STREAKS MAY COME THROUGH RIDGE INTO SE CA / SW AZ BUT SKIES 
SHOULD REMAIN MOSTLY CLEAR TONIGHT THROUGH TUES. TEMPS TO REMAIN 
WELL ABOVE NORMAL...WITH TEMPS ABOUT THE SAME OR SLIGHTLY WARMER 
TUES AS RIDGE MOVES OVERHEAD. ALL MODELS AGREE THAT UPPER LOW 
CURRENTLY WELL OF NW PACIFIC COAST WILL DIG TROF INTO W CA WED. THIS 
WILL BEGIN TO LOWER HEIGHTS FOR A LITTLE COOLING WED...AND BEGIN TO 
TIGHTEN PRESSURE GRADIENT FOR INCREASING WINDS OVER SE CA AND LOWER 
CO RIVER VALLEY DURING THE AFTERNOON AND THROUGH WED NIGHT. AIRMASS 
REMAINS DRY FOR MOSTLY CLEAR SKIES. TROF TO MOVE THROUGH SE CA /SW 
AZ THURS/FRI FOR MUCH COOLER TEMPS...WIND...BUT DRY. WILL CONTINUE 
MOSTLY CLEAR THURS AND POSSIBLY SOME CLOUDS FOR PARTLY CLOUDY SKIES 
FRI INTO THE WEEKEND. TROF REMAINS OVER REGION THROUGH THE WEEKEND 
WITH LITTLE DISTURBANCES MOVING THROUGH IT FOR COOL TEMPS AND PARTLY 
CLOUDY SKIES BUT GRADIENTS RELAX A LITTLE BIT BY SUN FOR LESS WIND. 
HOWEVER AS ALL MODELS KEEP TROFING OVER REGION OVER WEEKEND...AVN 
KEEPS A BIT SHARPER TROF WHEREAS MRF IS MORE BROADER. TROF BEGINS TO 
LIFT OUT WITH SOME HEIGHT RISES MON FOR A LITTLE WARMING AND A 
CONTINUED DECREASE IN WIND. DKS


.PSR...NONE