730
FXUS64 KEWX 091757
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1257 PM CDT WED SEP 9 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 1235 PM CDT WED SEP 9 2026
- RAIN CHANCES TODAY AND THURSDAY OVER THE COASTAL PLAINS REGION AS
WELL AS THE HILL COUNTRY AND SOUTHERN EDWARDS PLATEAU.
- LOW RAIN CHANCES SHRINK BACK TO THE COASTAL PLAINS FRIDAY THROUGH
THE UPCOMING WEEKEND, WITH DRY WEATHER ELSEWHERE.
- TEMPERATURES REMAIN ABOVE NORMAL THROUGH THE PERIOD, WITH SOME
CONCERNS FOR MAXIMUM TEMPERATURES AND PEAK HEAT INDEX VALUES
NEAR HEAT ADVISORY LEVELS THIS WEEKEND.
SHORT TERM
(TODAY THROUGH THURSDAY)
ISSUED AT 1215 AM CDT WED SEP 9 2026
A WEAK, MID-LEVEL DISTURBANCE MOVING INLAND FROM THE NORTHWESTERN
GULF WILL BRING A SUBTLE INCREASE IN MOISTURE TO THE REGION TODAY.
THIS ALONG WITH DAYTIME HEATING SHOULD HELP GENERATE SOME ISOLATED
TO SCATTERED SHOWERS AND STORMS ACROSS THE COASTAL PLAINS REGION AS
WELL AS THE HILL COUNTRY AND SOUTHERN EDWARDS PLATEAU. THE COASTAL
PLAINS WILL SEE THE BEST CHANCE FOR RAINFALL TODAY AND AGAIN
THURSDAY. SOME SLOW-MOVING SHOWERS AND STORMS MAY PRODUCE UP TO
AROUND 1 INCH OF RAINFALL. RAIN CHANCES ON THURSDAY SHOULD BE FAIRLY
SIMILAR TO WEDNESDAY AS MODELS INDICATE A WEAKNESS IN THE MID-LEVELS
STILL HANGING OUT IN THE VICINITY OF THE NORTHWESTERN GULF.
TEMPERATURES WILL CHANGE LITTLE THROUGH THURSDAY WITH HIGHS IN THE
MID 90S TO LOWER 100S. A FEW SPOTS IN THE COASTAL PLAINS MAY BRIEFLY
SEE PEAK HEAT INDEX VALUES NEAR 108 DEGREES.
LONG TERM
(THURSDAY NIGHT THROUGH TUESDAY)
ISSUED AT 1215 AM CDT WED SEP 9 2026
FOR FRIDAY INTO THE UPCOMING WEEKEND, THE MODELS GENERALLY AGREE IN
SHOWING SOME REMNANT MID-LEVEL WEAKNESS REMAINING OVER THE
NORTHWESTERN GULF, WITH WEAK RIDGING BUILDING IN FROM THE WEST. ANY
RAIN CHANCES SHOULD BE CONFINED TO THE COASTAL PLAINS REGION, WITH
DRY WEATHER EXPECTED ELSEWHERE. MODELS INDICATE A SLIGHT INCREASE IN
850MB TEMPERATURES AND THIS MAY TRANSLATE INTO A DEGREE OR TWO
UPWARD NUDGE IN TEMPERATURES ACROSS THE REGION. WE WILL CONTINUE TO
MONITOR FOR THE POSSIBILITY OF MAXIMUM TEMPERATURES AND PEAK HEAT
INDEX VALUES NEAR HEAT ADVISORY CRITERIA FOR AREAS GENERALLY ALONG
AND EAST OF INTERSTATE 35 FOR THE UPCOMING WEEKEND.
FOR EARLY NEXT WEEK, MID AND UPPER LEVEL HIGH PRESSURE BUILDS OVER
THE SOUTHEASTERN U.S. ALLOWING FOR A DEEPER SOUTH TO SOUTHEASTERLY
FLOW IN THE LOWER AND MID-LEVELS OF THE ATMOSPHERE TO DEVELOP. NO
SIGNIFICANT CHANGE IN TEMPERATURES ARE ANTICIPATED WITH BOTH HIGH
AND LOW TEMPERATURES LIKELY TO REMAIN ABOVE CLIMATOLOGICAL NORMALS.
SOME LOW RAIN CHANCES WILL LIKELY PERSIST OVER THE COASTAL PLAINS,
WITH DRY WEATHER EXPECTED ELSEWHERE.
AVIATION
(18Z TAFS)
ISSUED AT 1235 PM CDT WED SEP 9 2026
VERY LITTLE OPERATIONAL CHANGES FOR THIS FORECAST PERIOD AS IT IS
A SIMILAR SETUP AS THE LAST SEVERAL DAYS. SOUTHEASTERLY WINDS WILL
REMAIN IN PLACE BUT MAY SWITCH TO MORE SOUTH-SOUTHWESTERLY
OVERNIGHT AT AUS AND BY MID-MORNING AT SAT AND SSF. MVFR CEILINGS
ARE EXPECTED AT SAT AND SSF AFTER 09Z AND WILL PERSIST THROUGH
MID-MORNING THURSDAY. VFR CEILINGS ARE EXPECTED AT ALL OTHER
SITES.
PRELIMINARY POINT TEMPS/POPS
AUSTIN CAMP MABRY 77 99 77 100 / 0 10 0 10
AUSTIN BERGSTROM INTL AIRPORT 76 98 76 100 / 0 10 10 0
NEW BRAUNFELS MUNI AIRPORT 75 97 75 99 / 10 10 10 0
BURNET MUNI AIRPORT 73 96 74 97 / 0 10 0 10
DEL RIO INTL AIRPORT 78 100 78 102 / 0 0 0 0
GEORGETOWN MUNI AIRPORT 76 98 76 99 / 0 10 0 10
HONDO MUNI AIRPORT 75 98 75 99 / 10 10 10 0
SAN MARCOS MUNI AIRPORT 75 98 75 99 / 0 10 10 0
LA GRANGE - FAYETTE REGIONAL 76 98 76 99 / 0 20 10 10
SAN ANTONIO INTL AIRPORT 78 97 77 99 / 10 10 10 10
STINSON MUNI AIRPORT 77 99 77 100 / 10 10 10 0
EWX WATCHES/WARNINGS/ADVISORIES
NONE.
SHORT TERM...PLATT
LONG TERM....PLATT
AVIATION...MMM
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