FXUS64 KEWX 160538
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1138 PM CST TUE DEC 15 2009
.DISCUSSION...
SEE AVIATION FOR 06Z TAF DISCUSSION.
&&
.AVIATION...
OVERRUNNING MOISTURE DROPS OFF DRAMATICALLY FROM SOUTH TO NORTH
THIS EVENING WITH VFR CONDITIONS OVER AREA TAF SITES BEING
REINFORCED BY DRY NELY LOW LEVEL WINDS. SOME OF THE WINDS COULD
GUST TO AROUND 20 KTS OVERNIGHT. THE MID LEVEL CLOUDS WILL SLOWLY
BUILD AND LOWER OVER THE AREA DURING THE DAY WEDNESDAY...WITH
PRECIPATION REMAINING MAINLY SOUTH OF SAT/SSF MOST OF THE TIME.
MVFR AND LOWER CONDITIONS SHOULD EVENTUALLY DEVELOP IN THE SAT
AREA WEDNESDAY EVENING AS THE DRY NE WINDS BECOME LIGHT. ANY
PRECIPITATION SPREADING NORTH INTO THE AREA COULD ACCELERATE THE
LOWERING OF CLOUDS.
&&
.PREV DISCUSSION... /ISSUED 859 PM CST TUE DEC 15 2009/
UPDATE...
UPDATED FORECAST TO DECREASE WEDNESDAY'S MAX TEMPS BY 1-5
DEGREES...MAINLY ALONG AND EAST OF I-35 GIVEN COLDER 00Z NAM12
DATA...EXTENSIVE CLOUD COVER AND POTENTIAL RAIN-COOLING.
OTHERWISE...FORECAST ON TRACK.
PREV DISCUSSION... /ISSUED 307 PM CST TUE DEC 15 2009/
DISCUSSION...
A COLD SURFACE RIDGE WILL CONTINUE BUILDING INTO THE REGION TONIGHT
WHILE ALOFT..AN UPPER LOW OVER NORTHERN MEXICO WILL SEND UPPER
DISTURBANCES NORTHEAST ACROSS THE EASTERN HALF OF THE REGION.
CHANCES OF RAIN WILL THEREBY INCREASE..ESPECIALLY AFTER MIDNIGHT
ACROSS SOUTH CENTRAL AND EASTERN SECTIONS. THE CHANCES OF LIGHT RAIN
OR SHOWERS WILL CONTINUE THROUGHOUT THE DAY WEDNESDAY MAINLY OVER
SOUTHERN AND EASTERN PORTIONS OF THE CWA AS THE UPPER LOW WEAKENS
AND MOVES LITTLE. THE UPPER LOW WILL BEGIN SLOWLY MOVING ACROSS THE
REGION TOMORROW NIGHT AND EARLY THURSDAY WITH A CONTINUED CHANCE
FOR SHOWERS. DECREASING CHANCES THURSDAY AFTERNOON AS THE UPPER
TROUGH EXITS INTO SOUTHEAST TEXAS. CLEARING THURSDAY NIGHT AND FRIDAY
UNDER STRONG NORTHWEST FLOW ALOFT. ANOTHER SURGE OF COLDER AIR
WILL PUSH IN FRIDAY MORNING..BUT HIGHS WILL BE SEASONABLE (LOW TO
MID 60S) WITH MOSTLY SUNNY SKIES AND DYNAMIC WARMING ALOFT. SKIES
WILL CONTINUE MOSTLY SUNNY ON SATURDAY AND AFTER A COLD MORNING..
TEMPERATURES WILL AGAIN BE NEAR OR SLIGHTLY BELOW SEASONAL NORMS.
A SLIGHT INCREASE IN CLOUDINESS SUNDAY WITH READINGS NEAR SEASONAL
NORMS. ANOTHER UPPER TROUGH AND ATTENDANT COLD FRONT WILL PUSH
THROUGH SUNDAY NIGHT WITH A SLIGHT CHANCE OF LIGHT RAIN ALONG THE
FRONT LATE SUNDAY NIGHT. DECREASING CLOUDINESS AND COOL MONDAY. A
COLD DRY SURFACE RIDGE WILL BUILD DOWN INTO THE REGION MONDAY
NIGHT. SOUTHERLY FLOW WILL RETURN NEXT TUESDAY AS THE UPPER FLOW
BECOMES ZONAL (WEST-EAST ORIENTED) AHEAD OF THE NEXT SYSTEM.
&&
.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY 37 51 43 59 41 / 20 20 40 30 -
AUSTIN BERGSTROM INTL AIRPORT 39 50 40 56 36 / 20 30 40 30 -
NEW BRAUNFELS MUNI AIRPORT 37 49 42 59 38 / 30 40 50 30 -
BURNET MUNI AIRPORT 33 52 39 59 39 / 10 20 20 20 -
DEL RIO INTL AIRPORT 40 58 42 67 44 / 10 10 - - -
GEORGETOWN MUNI AIRPORT 35 51 41 58 39 / 10 10 20 20 -
HONDO MUNI AIRPORT 41 53 42 61 40 / 30 40 50 20 -
SAN MARCOS MUNI AIRPORT 38 50 41 57 40 / 30 30 50 30 -
LA GRANGE - FAYETTE REGIONAL 40 51 41 55 39 / 20 20 40 20 10
SAN ANTONIO INTL AIRPORT 40 50 43 61 42 / 30 40 50 30 -
STINSON MUNI AIRPORT 43 49 43 63 41 / 40 50 60 30 -
&&
.EWX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
$$
11/18
