000 
FXUS65 KPSR 200456
AFDPSR
AZZ020>028-CAZ030>033-201045-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
955 PM MST MON MAY 19 2003

.SYNOPSIS...
A FLAT HIGH PRESSURE AREA WITH WESTERLY FLOW ALOFT WILL PREVAIL OVER 
SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA EARLY THIS WEEK. THE HIGH 
WILL BEGIN TO BUILD OVER THE AREA TUESDAY AND WEDNESDAY FOR SLIGHTLY 
WARMER TEMPERATURES AND LIGHT WIND. A FEW HIGH CLOUDS CAN BE 
EXPECTED FROM TIME TO TIME. A WEAK UPPER LEVEL LOW PRESSURE SYSTEM 
WILL UNDERCUT THE HIGH THURSDAY INTO FRIDAY FOR SLIGHTLY COOLER 
TEMPERATURES FRIDAY THROUGH SUNDAY...THEN WARMING A FEW DEGREES 
MONDAY AS HIGH PRESSURE DOMINATES THE AREA ONCE AGAIN.

.DISCUSSION...
A VERY QUIET EVENING WX-WISE ACROSS PHX CWFA...WITH CLEAR SKIES AND 
TEMPS LOWERING NICELY. SATELLITE PIX CONTINUE TO SHOW A BAND OF HIGH 
CLOUDINESS SPREADING TOWARDS THE DESERT SW...BUT PROBABLY NOT ENOUGH 
TO CALL FOR MORE THAN MOSTLY CLEAR/SUNNY NEXT 24 HOURS. SURFACE HIGH 
DEVELOPS TO THE E OF THE RCKY NEXT 24 TO 36 HOURS...WHICH COULD GIVE 
SOME LIGHT ELY WINDS WED MORNING OVER SCNTRL PORTIONS...OTHERWISE 
LIGHT DIURNAL WINDS ANTICIPATED. TO THE EAST OVER NM...ENOUGH MID 
LEVEL MOISTURE AND INSTABILITY EXISTED TODAY TO GIVE SOME HIGH BASED 
CONVECTION INVOF WEAK SURFACE COLD FRONT. IR PIX SHOW NICE OUTFLOW 
BOUNDARIES SPEEDING WWD AND DISSIPATING AS THEY MOVE INTO WRN NM. 
BOTH TWC AND FGZ ZONES HAVE A SLIGHT CHANCE OF TSTMS ON TUE AFTN 
OVER THEIR FAR E...AND FURTHER W CLOSE TO OUR ZONE 24 ON WED. WILL 
WATCH OUT FOR POSSIBILITY OF HIGH BASED CONVECTION E OF GLOBE WED. 

FOR NOW...CURRENT FORECASTS APPEAR TO BE IN GREAT SHAPE...NO UPDATES 
NEEDED.   ESTLE

.PSR...NONE.

$$