FXUS64 KEWX 061801
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1201 PM CST SUN DEC 6 2009
.DISCUSSION...
SEE BELOW FOR 18Z TAF DISCUSSION.
&&
.AVIATION...
AREAS OF LIGHT RAIN AND DRIZZLE WILL PULL AWAY FROM THE I-35
TERMINALS IN THE NEXT HOUR WITH CIGS LIFTING INTO THE MVFR OR VFR
CATEGORY BY 21Z. WEAK FRONT MOVES THROUGH TONIGHT TO MAKE
OVERNIGHT CLOUD AND FOG FORECAST COMPLICATED FOR A FEW HOURS, SO
WILL TAKE A SIMPLIFIED VIEW ON THE TRENDS FOR NOW. LOCALLY DENSE
FOG COULD DEVELOP BETWEEN 08Z AND THE TIME OF THE WIND SHIFT.
NORTH WINDS AND SLIGHTLY RAISING CEILINGS SHOULD DEVELOP AROUND
DAYBREAK. A ZONAL PATTERN ALOFT SHOULD MEAN THAT LOW CLOUDS SHOULD
HAVE TROUBLE CLEARING, AND COULD EVEN EXPAND WEST TO THE DRT AREA
LATE MONDAY MORNING.
&&
PREV DISCUSSION... /ISSUED 344 AM CST SUN DEC 6 2009/
DISCUSSION...
THIS MORNING MID AND HIGH LEVEL CLOUDINESS HAS OVERSPREAD SOUTH CENTRAL
TEXAS IN RESPONSE TO AN APPROACHING UPPER LEVEL DISTURBANCE. A FEW WEAK
RADAR RETURNS WERE NOTED ACROSS SOUTH TEXAS MOVING NORTHEAST. ISOLATED
TO SCATTERED LIGHT SHOWERS WILL OCCUR TODAY MAINLY EAST OF HIGHWAY
281...IN AN AREA OF BETTER LOW LEVEL MOISTURE RETURN. CLOUDINESS
ASSOCIATED WITH THE PASSING UPPER LEVEL DISTURBANCE WILL INHIBIT
WARMING THIS AFTERNOON...ESPECIALLY ACROSS OUR NORTHEASTERN
COUNTIES...WHERE HIGHS WILL STRUGGLE TO REACH 50 DEGREES. EXPECT
AREAS OF FOG TO DEVELOP LATE TONIGHT WITH MOISTURE IN THE BOUNDARY
LAYER ON THE INCREASE. THE FOG WILL OCCUR GENERALLY SOUTH AND EAST
OF A LINE FROM GEORGETOWN TO SAN ANTONIO TO DEL RIO.
LOW LEVEL CLOUDS WILL BE ON THE INCREASE MONDAY AFTERNOON WITH SHOWERS
DEVELOPING DURING THE DAY. SHOWERS WILL BE ON THE INCREASE MONDAY
NIGHT INTO TUESDAY AS THE NEXT UPPER LEVEL TROF BEGINS TO EXIT
THE FOUR CORNERS REGION. THE SHOWERS WILL END FROM WEST TO EAST ON
TUESDAY AS THE UPPER LEVEL TROF MOVES EASTWARD ACROSS THE CENTRAL
PLAINS DRAGGING A PRE-FRONTAL SFC TROF ACROSS SOUTH CENTRAL
TEXAS. THE PRE-FRONTAL SFC TROF WILL BE FOLLOWED BY A COLD FRONT
WHICH WILL MOVE ACROSS OUR CWFA TUESDAY NIGHT. THE AIRMASS
ASSOCIATED WITH THIS FROPA WILL BE MODIFIED POLAR SO A FREEZE WILL
BE POSSIBLE THURSDAY MORNING ACROSS THE EASTERN HILL COUNTRY.
THE NEXT UPPER LEVEL TROF IN THE WESTERLIES WILL MOVE ACROSS THE
CENTRAL PLAINS FRIDAY INTO SATURDAY. THIS FEATURE WILL PUSH A
WEAK COLD FRONT ACROSS SOUTH CENTRAL TEXAS FRIDAY NIGHT. ISOLATED
TO SCATTERED SHOWERS WILL BE POSSIBLE THURSDAY NIGHT INTO FRIDAY
DUE TO THE RETURN LOW LEVEL FLOW PRECEDING THE NEXT FROPA. NOT
MUCH COOLING WILL OCCUR WITH THIS AIRMASS WITH NEAR SEASONAL TEMPS
EXPECTED FOR THE UPCOMING WEEKEND.
LONG RANGE MODEL SOLUTIONS ARE HINTING AT ANOTHER INTRUSION OF A
POLAR AIRMASS EARLY NEXT WEEK.
&&
.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY 40 57 49 67 49 / - 10 50 30 10
AUSTIN BERGSTROM INTL AIRPORT 37 59 49 67 48 / - 20 50 30 10
NEW BRAUNFELS MUNI AIRPORT 41 58 48 67 50 / - 20 50 20 10
BURNET MUNI AIRPORT 38 54 46 66 45 / - 10 40 20 -
DEL RIO INTL AIRPORT 41 64 51 70 48 / 0 - 20 10 -
GEORGETOWN MUNI AIRPORT 40 54 48 65 46 / - 10 50 30 10
HONDO MUNI AIRPORT 40 62 49 67 49 / - 10 30 10 -
SAN MARCOS MUNI AIRPORT 42 59 49 66 49 / - 20 50 20 10
LA GRANGE - FAYETTE REGIONAL 43 61 51 68 51 / 20 20 50 40 20
SAN ANTONIO INTL AIRPORT 42 60 51 68 51 / - 10 40 20 10
STINSON MUNI AIRPORT 42 60 51 70 49 / - 10 40 20 10
&&
.EWX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
$$
11/18
