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000
FXUS65 KTWC 090935
AFDTWC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
235 AM MST SUN DEC 8 2013

.SYNOPSIS...COOLER AIR WILL ACCOMPANY A SYSTEM TODAY...WITH MORE
FREEZING TEMPERATURES TUESDAY MORNING IN THE LOWER ELEVATION VALLEYS
AROUND TUCSON AND WEST. OTHERWISE...DRY CONDITIONS WITH A WARMING
TREND IN DAYTIME TEMPERATURES CAN BE ANTICIPATED TUESDAY THROUGH
SATURDAY.

&&

.DISCUSSION...INITIAL FOCUS IS ON THE COLD AIR SLIDING DOWN THE WRN
STATES THIS MORNING. AS THIS COLD/DRY AIR MOVES IN TODAY MOST OF THE
CLOUD COVER WILL CLEAR OUT. CURRENT FORECAST HAS FROPA DURING THE
AFTERNOON HOURS TODAY...WITH A CONTINUAL PUSH OF COLD AIR BEHIND AS
SURFACE RIDGE BUILDS OF THE WRN CONUS. EARLY TUESDAY AS THE RIDGE
SLIDES SE-WARD RIDGING WILL BACKDOOR THE COLD AIR INTO THE AREA. ALL
IN ALL TUESDAY LOOKS TO BE THE COLDEST DAY. FREEZE WATCH IN PLACE
THOUGH MOST LOCATIONS HAVE ALREADY HIT FREEZING THIS YEAR.
NEVERTHELESS...WILL LEAVE IT FOR THE NEXT SHIFT.

THE AREA WILL WARMING UP AFTER TUESDAY MORNING AS THE LONG WAVE TROF
FINALLY SLIDES EAST. HOWEVER...ONE LAST PIECE OF SHORTWAVE ENERGY
WILL GET CUT OFF AND LINGER WEST OF BAJA BEFORE EJECTING WEDNESDAY
OVER SRN AZ. THE ONLY ISSUE WITH THIS WILL BE HOW MUCH MOISTURE CAN
GET RAPPED UP IN THE LOW AND BROUGHT INTO THE AREA. HAVE UPPED POPS
FOR THURSDAY TO ACCOUNT FOR THIS.

&&

.AVIATION...VALID THRU 10/12Z. VFR CONDITIONS AND LIGHT WINDS WILL
PREVAIL THRU THE PERIOD. AVIATION DISCUSSION NOT UPDATED FOR TAF
AMENDMENTS.

&&

.FIRE WEATHER...CLOUDS WILL CLEAR OUT TODAY AS COLDER AND DRIER AIR
MOVES IN. THE COLD AIR WILL BE IN PLACE THRU TUESDAY MORNING...WITH
WARMING TREND TUESDAY AFTERNOON INTO THE LATTER HALF OF THE WEEK.
WINDS AND HUMIDITY LEVELS ARE EXPECTED TO REMAIN WITHIN SEASONALLY
NORMAL RANGES INTO NEXT WEEKEND.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...
  FREEZE WATCH FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING FOR
   PINAL AND PIMA COUNTIES ZONES AZZ501>506.

&&

$$

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