Area Forecast Discussion
Issued by NWS Phoenix, AZ

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FXUS65 KPSR 252156
AFDPSR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
255 PM MST MON MAY 25 2015

.SYNOPSIS...DRY WEATHER ALONG WITH A WARMING TREND IS FORECAST FOR
THE REMAINDER OF THIS WEEK AND WEEKEND. AFTERNOON TEMPERATURES ON
THE LOWER DESERTS BY FRIDAY THROUGH SUNDAY WILL GENERALLY WARM TO
BETWEEN 100 AND 105 DEGREES.

&&

.DISCUSSION...

TONIGHT THROUGH WEDNESDAY...ISOLATED SHWRS AND TSTMS WILL CONTINUE
THIS EVENING OVER PORTIONS OF NORTHEAST AZ JUST OUTSIDE OUR
MOUNTAINOUS ZONE 24 SOUTHERN GILA COUNTY. THE WEAK DISTURBANCE WILL
MOVE INTO NEW MEXICO TONIGHT...FOLLOWED BY SHORTWAVE RIDGING AND
VERY STABLE CONDITIONS ON TUESDAY.

ANOTHER WEAK SHORTWAVE TROF WILL MOVE INTO THE REGION WEDNESDAY...
HOWEVER ATMOSPHERIC HEIGHT AND THICKNESS VALUES WILL APPROACH NORMAL
MEANING ANOTHER WARM AFTERNOON OF NEAR NORMAL TEMPERATURES.
WEDNESDAYS AIRMASS WILL BE DRIER...BUT MODELED SOUNDINGS OVER THE
WHITE MOUNTAINS SUPPORT PERHAPS A SLIGHT CHANCE OF LATE AFTERNOON
THUNDERSTORMS JUST OUTSIDE OUR SOUTHERN GILA COUNTY ZONE 24.

THURSDAY THROUGH MONDAY...A HIGH PRESSURE SYSTEM IS FORECAST TO
BUILD INTO THE REGION THIS PERIOD SUPPORTING DRY AND HOT WEATHER.
AFTERNOON TEMPERATURES ON THE LOWER DESERTS FRIDAY THROUGH MONDAY
WILL WARM INTO THE 100 TO 105 DEGREE RANGE.

&&

.AVIATION... SOUTH-CENTRAL ARIZONA INCLUDING KPHX...KIWA...AND
KSDL...AND SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA INCLUDING KIPL
AND KBLH...

OTHER THEN A FEW HIGH CLOUDS FROM TIME-TO-TIME...MAINLY CLEAR SKIES
TO PREVAIL THROUGH THE TAF PERIOD. WEAK SFC PRESSURE GRADIENTS WITH
KEEP WINDS ON THE LIGHT SIDE...MAINLY AOB 8KTS...MOSTLY FOLLOWING
TYPICAL DIURNAL TRENDS.

AVIATION DISCUSSION NOT UPDATED FOR AMENDED TAFS.

&&

.FIRE WEATHER... THURSDAY THROUGH MONDAY... HIGH PRESSURE THAT WILL
BE GRADUALLY BUILDING OVER THE REGION WILL KEEP DRY CONDITIONS IN
PLACE THROUGH THE FORECAST PERIOD...WITH TEMPERATURES GRADUALLY
WARMING INTO SATURDAY...BEFORE LEVELING OFF FROM SUNDAY INTO EARLY
NEXT WEEK. LOWER DESERT HIGHS WILL LIKELY REACH 100 DEGREES AT MOST
LOCATIONS BY FRIDAY...THEN RISE INTO THE 101-105 DEGREE RANGE FROM
SATURDAY ONWARD INTO NEXT MONDAY. MINIMUM RH VALUES ARE EXPECTED TO
RANGE FROM AROUND 8 PERCENT TO THE MID TEENS EACH DAY. DESPITE THESE
LOW RH VALUES...THE COMBINATION OF LIGHT WINDS AND FAIR-GOOD
OVERNIGHT RECOVERIES WILL CONTINUE TO KEEP FIRE DANGER LEVELS AT
RELATIVELY LOW LEVELS 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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