619
FXUS65 KPSR 210304
AFDPSR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
805 PM MST FRI NOV 20 2009
SYNOPSIS
DRY WEATHER IS EXPECTED TO CONTINUE AT LEAST THROUGH THANKSGIVING.
THE WEAK SOUTHERN PORTIONS OF PACIFIC LOW PRESSURE SYSTEMS WILL BRING
TEMPERATURES DOWN SOMEWHAT WITH A RELATIVELY SMALL AMOUNT OF HIGH
CLOUDS THIS WEEKEND...BUT FOR THE MOST PART...MOSTLY CLEAR NIGHTS AND
SUNNY DAYS ARE EXPECTED TO CONTINUE THROUGH THANKSGIVING. HIGH
PRESSURE ALOFT BETWEEN HAWAII AND BAJA CALIFORNIA IS EXPECTED TO
BUILD NORTHEAST OVER OUR AREA WITH TEMPERATURES RISING TO WELL ABOVE
AVERAGE FOR LATE NOVEMBER BY THANKSGIVING DAY. HIGHS IN THE DESERT
AREAS INCLUDING PHOENIX...YUMA AND EL CENTRO ARE EXPECTED TO BE IN
THE UPPER 70S OR LOWER 80S BY THANKSGIVING DAY.
DISCUSSION
CURRENT DRY FORECASTS THROUGH THE WEEKEND LOOK OK AS EXPLAINED IN
THE PREVIOUS DISCUSSION BELOW. NO UPDATES.
PREVIOUS DISCUSSION...
DRY WEATHER IS EXPECTED TO CONTINUE AT LEAST THROUGH THANKSGIVING.
THE FLOW ALOFT WILL GENERALLY BE FROM THE NORTHWEST THROUGH TUESDAY.
IN THIS FLOW...THE DRY AND WEAK SOUTHERN PORTIONS OF PACIFIC LOW
PRESSURE SYSTEMS ARE EXPECTED TO BRING TEMPERATURES DOWN SOMEWHAT IN
SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA INCLUDING EL CENTRO...
IMPERIAL AND YUMA SATURDAY...AND SOUTH-CENTRAL ARIZONA INCLUDING THE
GREATER PHOENIX AREA SUNDAY...CLOSE TO OR JUST SLIGHTLY ABOVE
AVERAGE FOR THE LATTER PART OF NOVEMBER. A RELATIVELY SMALL AMOUNT
OF HIGH CLOUDS IS ALSO EXPECTED THIS WEEKEND...BUT OVERALL MOSTLY
CLEAR NIGHTS AND SUNNY DAYS ARE EXPECTED TO CONTINUE THROUGH
THANKSGIVING.
HIGH PRESSURE ALOFT BETWEEN HAWAII AND BAJA CALIFORNIA IS EXPECTED TO
BUILD NORTHEAST OVER OUR AREA WITH TEMPERATURES RISING TO WELL ABOVE
AVERAGE FOR LATE NOVEMBER BY THANKSGIVING DAY. HIGHS IN THE DESERT
AREAS INCLUDING PHOENIX...YUMA AND EL CENTRO ARE EXPECTED TO BE IN
THE UPPER 70S OR LOWER 80S BY THANKSGIVING DAY.
SURFACE HIGH PRESSURE IS EXPECTED TO BUILD NORTH AND EAST OF OUR AREA
AND BRING SOME BREEZINESS AT TIMES FROM THE NORTH AND EAST BY
WEDNESDAY AND THANKSGIVING.
AVIATION
SOUTHEAST CA...SOUTHWEST AND SOUTH CENTRAL AZ...INCLUDING KIPL...
KBLH...KPHX...AND KIWA.
MOSTLY CLEAR SKIES AND LIGHT WIND ARE EXPECTED THROUGH AT LEAST 03Z
SUN.
AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS.
FIRE WEATHER
SUNDAY THROUGH THURSDAY...
WEAK LOW PRESSURE SYSTEMS WILL MOVE ACROSS THE AREA THIS WEEKEND...
YIELDING SLIGHTLY COOLER TEMPERATURES AND HIGHER HUMIDITY VALUES.
HIGH PRESSURE BUILDS OVER THE WESTERN STATES EARLY NEXT WEEK...
BRINGING WARMER TEMPERATURES...LOW DAYTIME HUMIDITY VALUES AND
MODEST OVERNIGHT RECOVERY THROUGH THANKSGIVING DAY. WINDS WILL FAVOR
NORTH AND NORTHEAST TUESDAY THROUGH THURSDAY...GUSTY AT TIMES AT THE
RIDGETOPS.
PSR WATCHES/WARNINGS/ADVISORIES
AZ...NONE.
CA...NONE.
NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT
WEATHER.GOV/PHOENIX
DISCUSSION...VASQUEZ/ELLIS
AVIATION...VASQUEZ
FIRE WEATHER...MEYERS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page