821
FXUS65 KPSR 191000
AFDPSR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
300 AM MST SUN MAY 19 2013
SYNOPSIS
A SERIES OF COOL LOW PRESSURE SYSTEMS WILL CONTINUE TO MOVE INTO THE
WESTERN STATES MAINLY NORTH OF ARIZONA THROUGH MONDAY. NEAR NORMAL
TEMPERATURES...MOSTLY CLEAR SKIES...AND SOMEWHAT BREEZY AFTERNOONS
ARE EXPECTED. A HIGH PRESSURE SYSTEM WILL BUILD BACK INTO THE REGION
TUESDAY THROUGH FRIDAY...AND EXCEPT FOR SOME HIGH CLOUDS AT TIMES...
AFTERNOON TEMPERATURES ON THE DESERTS WILL WARM BACK INTO THE 100 TO
103 DEGREE RANGE.
DISCUSSION
TODAY THROUGH MONDAY...
A SERIES OF COOL LOW PRESSURE SYSTEMS WILL CONTINUE TO MOVE THROUGH
THE INTERMOUNTAIN AND ROCKY MOUNTAIN STATES...INCLUDING PARTS OF
NORTHERN AZ. MOSTLY CLEAR SKIES...NEAR NORMAL TEMPERATURES...AND
SLIGHTLY BREEZY AFTERNOONS ARE EXPECTED ACROSS OUR FORECAST AREA...
SOUTHEAST CA TO SOUTH CENTRAL AZ.
TUESDAY THROUGH FRIDAY...
A HIGH PRESSURE SYSTEM WILL BUILD BACK INTO THE REGION. DESERT
TEMPERATURES WILL WARM BACK INTO THE 100 TO 103 DEGREE RANGE.
OCCASIONAL HIGH CLOUDS WILL ALSO WORK INTO THE REGION FROM THE
PACIFIC.
SATURDAY AND SUNDAY...
ANOTHER LARGE PACIFIC LOW PRESSURE SYSTEM WILL MOVE INTO THE WESTERN
STATES LATE FRIDAY THROUGH SUNDAY...MAINLY NORTHWEST OF AZ. GUSTY
AFTERNOON WINDS ARE EXPECTED THIS PERIOD...ALONG WITH TEMPERATURES
FALLING BACK TO NEAR SEASONAL NORMALS.
AVIATION
SOUTH-CENTRAL ARIZONA...INCLUDING KPHX...KIWA...KSDL...SOUTHEAST
CALIFORNIA/SOUTHWEST ARIZONA...INCLUDING KIPL AND KBLH...
WEAK RIDGING BUILDING INTO THE REGION FROM THE WEST WILL KEEP SKIES
CLEAR...OR MOSTLY CLEAR THROUGH THE TAF PERIOD. WINDS TO REMAIN
MAINLY ON THE LIGHT SIDE THROUGH SUNDAY...EXCEPT FOR SOME WESTERLY
AFTERNOON BREEZES AT THE PHX AREA TERMINALS. NO AVIATION IMPACTS
EXPECTED THROUGH THE PERIOD.
AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS.
FIRE WEATHER
TUESDAY THROUGH SATURDAY...
HIGH PRESSURE PASSING OVER THE REGION WILL KEEP THE WEATHER
DRY...UNDER MOSTLY CLEAR SKIES...WITH AFTERNOON HIGHS NEAR 100F
ACROSS THE LOWER DESERTS TUESDAY THROUGH THURSDAY. A SLIGHT COOLING
TREND IS THEN EXPECTED ON FRIDAY AND SATURDAY AS A LOW PRESSURE TROF
PUSHES SOUTHWARD INTO THE WESTERN GREAT BASIN. WINDS TO REMAIN ON
THE LIGHT SIDE THROUGH THURSDAY...WITH SOME AFTERNOON WESTERLY
BREEZES TO DEVELOP ON FRIDAY AND SATURDAY. MINIMUM HUMIDITIES TO
REMAIN IN THE 5 TO 10 PERCENT RANGE...WITH FAIR OVERNIGHT RECOVERIES
THROUGH THE FORECAST PERIOD.
PSR WATCHES/WARNINGS/ADVISORIES
AZ...NONE.
CA...NONE.
VISIT US ON FACEBOOK...TWITTER...AND AT WEATHER.GOV/PHOENIX
DISCUSSION...VASQUEZ
AVIATION...PERCHA
FIRE WEATHER...PERCHA
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