FXUS65 KTWC 150953 CCA
AFDTWC

AREA FORECAST DISCUSSION...CORRECTED DATE
NATIONAL WEATHER SERVICE TUCSON AZ
250 AM MST TUE DEC 15 2009

.SYNOPSIS...HIGH PRESSURE ALOFT WILL PROVIDE DRY CONDITIONS WITH 
ABOVE NORMAL DAYTIME TEMPERATURES FROM WEDNESDAY INTO THE WEEKEND.

&&

.DISCUSSION...THE SHORT TERM CONCERN WAS THE DEVELOPMENT OF PATCHY 
FOG THIS MORNING. SAFFORD HAD ALREADY DROPPED DOWN TO 1/4 OF A MILE 
IN FOG...AND SATELLITE IMAGERY SUGGESTED THAT FOG WAS FORMING IN THE 
NORTHERN PART OF THE SULPHUR SPRINGS VALLEY IN COCHISE COUNTY. AS A 
RESULT...HAVE POSTED A DENSE FOG ADVISORY THROUGH 9 AM MST FOR 
GRAHAM AND COCHISE COUNTIES. OTHERWISE...GENERALLY CLEAR SKIES CAN 
BE ANTICIPATED TODAY AFTER THE SYSTEM THAT PASSED THROUGH THE REGION 
YESTERDAY. LATEST MODELS WERE IN GOOD AGREEMENT WITH A RIDGE OF HIGH 
PRESSURE ALOFT BUILDING OVER THE AREA. THIS WILL LEAD TO DRY AND 
WARMER CONDTIONS WITH HIGH TEMPERATURES REMAINING SEVERAL DEGREES 
ABOVE NORMAL THIS WEEK. GFS MODEL SHOWED A WEAK SHORTWAVE TROUGH 
PASSING THROUGH NORTHERN ARIZONA AROUND WEDNESDAY NIGHT AND THURSDAY 
FOR SOME INCREASE IN CLOUDINESS. OTHERWISE...NO PRECIPITATION 
EXPECTED WITH THIS FEATURE. NEXT SYSTEM TO WATCH FOR...AS DEPICTED 
BY THE GFS MODEL...WILL BE EARLY NEXT WEEK. 

&&

.AVIATION...SOME PATCHY FOG THRU 16Z TODAY. OTHERWISE...SUNNY SKIES 
AREAWIDE TODAY. SURFACE WINDS MOSTLY LESS THAN 12 KTS INTO TODAY. 
AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS.

&&

.FIRE WEATHER...NO FIRE WEATHER CONCERNS AT THIS TIME.
 
&&

.TWC WATCHES/WARNINGS/ADVISORIES...NONE.

$$

WEATHER.GOV/TUCSON