FXUS64 KSJT 251800
AFDSJT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
1200 PM CST FRI DEC 25 2009
.DISCUSSION...
SEE 18Z AVIATION DISCUSSION BELOW.
&&
.AVIATION...
VFR TO CONTINUE. SFC RIDGE WILL BUILD INTO THE AREA FROM THE
NORTHWEST TROUGH SATURDAY. LIGHT SOUTH WINDS TODAY WILL BECOME
LIGHT NORTHWEST BY SATURDAY.
&&
.PREV DISCUSSION... /ISSUED 536 AM CST FRI DEC 25 2009/
DISCUSSION...
SEE 12Z AVIATION DISCUSSION BELOW.
AVIATION...
VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS. LIGHT AND
VARIABLE WINDS EARLY THIS MORNING WILL TURN TO THE SOUTH THIS
AFTERNOON BETWEEN 10 AND 15 KNOTS...THEN DIMINISH TO LIGHT AND
VARIABLE AGAIN OVERNIGHT. THE ONLY CLOUDS WILL BE SOME UPPER
LEVEL CLOUDS ACROSS THE SOUTHERN HALF OF THE AREA. 20
PREV DISCUSSION... /ISSUED 342 AM CST FRI DEC 25 2009/
SHORT TERM...
THE UPPER LEVEL SYSTEM THAT BROUGHT BLIZZARD CONDITIONS TO THE BIG
COUNTRY TODAY HAS MOVED OFF TO THE NORTHEAST. IN ITS WAKE...WE HAVE
VERY COLD...DRY AIR WITH CLEAR SKIES ACROSS MOST OF THE AREA EXCEPT
FOR FAR SOUTHERN AREAS WHERE SOME SUBTROPICAL UPPER LEVEL MOISTURE
IS MOVING EAST ACROSS THE SOUTHERN HALF OF TEXAS.
WE WILL SEE COLD CONDITIONS AGAIN TODAY...ESPECIALLY WHERE THE
SNOWCOVER IS LOCATED. WITH THE SNOWCOVER IN PLACE ACROSS THE BIG
COUNTRY...ALBEDO WILL BE INCREASED...AND ANY MELTING/SUBLIMATION
THAT CAN OCCUR WILL RESULT IN COOLING AS WELL...SO HAVE GONE WITH
30S FOR HIGHS ACROSS THE BIG COUNTRY WITH 40S ACROSS THE REST OF THE
AREA. PARTLY CLOUDY CONDITIONS WILL PREVAIL FOR SOUTHERN AREAS WITH
CLEAR SKIES FOR THE NORTHERN 1/3 OF THE CWA.
WE WILL HAVE ANOTHER COLD NIGHT TONIGHT WITH CLEAR SKIES...DRY AIR
AND LIGHT WINDS ONCE AGAIN. EXPECTING LOWS IN THE LOWER 20S MOST OF
THE AREA WITH A FEW UPPER TEENS POSSIBLE AS WELL...ESPECIALLY
NORTHERN AREAS IF/WHERE ANY SNOWCOVER PERSISTS THROUGH TODAY.
20
LONG TERM...
DRY CONDITIONS AND WELL BELOW NORMAL TEMPERATURES WILL CONTINUE
THROUGH THE WEEKEND INTO THE FIRST PART OF THE UPCOMING WORK WEEK AS
A SURFACE HIGH INFLUENCES THE REGION...WITH AFTERNOON HIGHS ONLY
WARMING UP TO THE LOW 40S TO AROUND 50 DEGREES WITH OVERNIGHT LOWS
IN THE UPPER TEENS TO MID 20S. THE MODELS BRING THE NEXT UPPER LEVEL
TROUGH EARLY NEXT WEEK ...BUT THE MODELS ARE DIFFERING ON THE TRACK
AND TIMING OF THE SYSTEM FOR THE NEXT WEEK. HOWEVER...IT DOES
APPEAR THAT THERE IS A POSSIBILITY OF WINTRY MIX ON TUESDAY INTO WEDNESDAY
MORNING. THE MEDIUM RANGE ARE CONSISTENT WITH ANOTHER UPPER LEVEL
TROUGH MOVING ACROSS THE REGION FOR THE LATTER PART OF THE
UPCOMING OF NEXT WEEK...BUT ATTM DRY CONDITIONS ARE EXPECTED WITH
THIS SYSTEM.
&&
.PRELIMINARY POINT TEMPS/POPS...
ABILENE 38 22 46 23 47 / 0 0 0 0 0
SAN ANGELO 46 21 49 23 51 / 0 0 0 0 0
JUNCTION 46 21 54 24 54 / 0 0 0 0 0
&&
.SJT WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
$$
99/99/24
