871
FXUS64 KSJT 072131
AFDSJT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
331 PM CST SAT NOV 7 2009
SHORT TERM
CLOSED UPPER LOW CURRENTLY OVER NORTHWEST MEXICO WILL OPEN AND MOVE
EAST ACROSS SOUTH TEXAS ON SUNDAY. SKIES WILL BE MOSTLY CLEAR
INITIALLY THIS EVENING WITH SCATTERED HIGH CLOUDS MOVING INTO THE
AREA FROM THE SOUTHWEST LATER THIS EVENING. LOW LEVEL MOISTURE
EXPECTED TO INCREASE OVERNIGHT AHEAD OF THE SYSTEM WITH ANOTHER
STRATUS DECK EXPECTED TO DEVELOP AFTER MIDNIGHT IN ASSOCIATION WITH
A DEVELOPING 30-40 KT LOW LEVEL JET. LIGHT SOUTH WINDS WILL PROVIDE
ENOUGH MIXING TO LIMIT FOG POTENTIAL OVER MUCH OF THE AREA BUT COULD
SEE SOME PATCHY FOG DEVELOP IN THE RIVER VALLEYS OVER SOUTHERN
SECTIONS WHERE WINDS WILL BE LIGHTER. SOUTHERLY WINDS AND INCREASING
CLOUDS WILL ALLOW FOR WARMER MIN TEMPS TONIGHT WITH LOWS IN THE LOW
TO MID 50S. LOW CLOUDS MAY BE SLOW TO SCATTER OUT TOMORROW MORNING
AS MID/UPPER LEVEL CLOUDS AHEAD OF THE APPROACHING TROUGH LIMIT
MIXING POTENTIAL INITIALLY. CLOUD COVER WILL RESULT IN A BIT COOLER
TEMPS SUNDAY BUT STILL NEAR OR SLIGHTLY ABOVE SEASONAL VALUES WITH
HIGHS MAINLY LOWER 70S. WILL CONTINUE TO MENTION A SLIGHT CHANCE FOR
SHOWERS MAINLY OVER THE NW HILL COUNTRY AND HEARTLAND SUN AFTERNOON
WHERE SLIGHTLY BETTER MOISTURE WILL EXIST BUT ANY PRECIP IS EXPECTED
TO BE VERY LIGHT.
LONG TERM
UPPER LEVEL LOW/SHORTWAVE TROUGH AXIS WILL CONTINUE TO MOVE EAST
ACROSS THE FORECAST AREA SUNDAY NIGHT AND SHOULD BE LOCATED EAST
OF THE AREA BY EARLY MONDAY...WITH A SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS ENDING FROM WEST TO EAST OVER PRIMARILY
THE NORTHWEST HILL COUNTRY AND EASTERN HEARTLAND SUNDAY EVENING.
DRY FORECAST IS ON TAP MONDAY WITH THE UPPER LEVEL LOW EAST OF
WEST CENTRAL TEXAS.
WILL KEEP A SLIGHT CHANCE OF SHOWERS MONDAY NIGHT OVER PRIMARILY
THE NORTHERN CWA AS A COLD FRONT MOVES SOUTH ACROSS THE AREA. RAIN
CHANCES END AS A WEAK UPPER LEVEL RIDGE BUILDS INTO THE AREA
TUESDAY BEHIND THE EXITING UPPER LOW. NEXT UPPER LEVEL SYSTEM
MOVES OVER THE NORTHWESTERN STATES THE FIRST OF THE WEEK AND THEN
THROUGH THE UPPER PLAINS BY LATE IN THE WEEK. WILL MAINTAIN A DRY
FORECAST THROUGH THE EXTENDED AS THE BEST DYNAMICS ASSOCIATED
WITH THIS SYSTEM REMAIN OVER THE CENTRAL AND NORTHERN PLAINS.
POST FRONTAL AFTERNOON TEMPERATURES WILL GENERALLY BE IN THE 60S
TUESDAY... WARMING INTO THE 70S OVER ALL OF WEST CENTRAL TEXAS BY
THURSDAY. NEXT UPPER TROUGH PASSAGE IS FORECASTED THROUGH THE AREA
OVER THE COMING WEEKEND...WITH NO ASSOCIATED RAINFALL EXPECTED.
PRELIMINARY POINT TEMPS/POPS
ABILENE 55 73 52 74 47 / 10 10 10 10 20
SAN ANGELO 55 73 52 76 47 / 10 10 10 10 10
JUNCTION 55 73 54 77 48 / 10 20 20 10 10
SJT WATCHES/WARNINGS/ADVISORIES
NONE.
24/15
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