455
FXUS64 KEWX 132315 AAA
AFDEWX
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
615 PM CDT SUN SEP 13 2026
..NEW AVIATION
KEY MESSAGES
UPDATED AT 605 PM CDT SUN SEP 13 2026
- A HEAT ADVISORY IS IN EFFECT THROUGH 7 PM TODAY FOR AREAS GENERALLY
ALONG AND EAST OF THE INTERSTATE 35 CORRIDOR. ANOTHER HEAT
ADVISORY HAS BEEN ISSUED FOR THE SAME LOCATIONS MONDAY FROM 12
PM TO 7 PM.
- LOW RAIN CHANCES (10-20%) FOR THE I-35 CORRIDOR AND COASTAL
PLAINS THROUGH MONDAY. THEN RAIN CHANCES REMAIN CONFINED TO THE
COASTAL PLAINS THROUGH THE WEEK.
- HUMID MORNING CONDITIONS AND ABOVE AVERAGE TEMPERATURES CONTINUE
THROUGH THE THE WEEK.
SHORT TERM
(TONIGHT THROUGH MONDAY NIGHT)
ISSUED AT 1258 PM CDT SUN SEP 13 2026
THE RIDGE HAS SHIFTED OVER NORTH TEXAS TODAY AND WILL CONTINUE AN
EASTWARD PROGRESSION BEFORE STALLING OVER THE SOUTHEASTERN US
TOMORROW INTO THE MIDDLE OF THE WEEK. CONTINUED HOT AND MAINLY DRY
CONDITIONS ARE FORECAST IN THE SHORT TERM PERIOD. HIGHS WILL BE
SIMILAR THIS AFTERNOON AND TOMORROW FROM THE MID 90S IN THE HILL
COUNTRY AND SOUTHERN EDWARDS PLATEAU TO THE UPPER 90S UP TO 104
DEGREES ELSEWHERE. FOR THE I-35 CORRIDOR AND COASTAL PLAINS, HEAT
INDEX VALUES WILL RISE TO HEAT ADVISORY LEVELS FROM THE 108-111
DEGREE RANGE BOTH DAYS. THE HEAT ADVISORY REMAINS IN EFFECT THROUGH
7 PM TODAY AND ANOTHER HEAT ADVISORY HAS BEEN ISSUED FOR TOMORROW
FOR THE SAME LOCATIONS.
THE VAST MAJORITY OF THE AREA IS EXPECTED TO REMAIN DRY TODAY AND
TOMORROW, THOUGH LOW (10-20%) CHANCES FOR RAIN DO EXIST FROM THE I-
35 CORRIDOR INTO THE COASTAL PLAINS. THE COASTAL PLAINS IS THE MORE
LIKELY CULPRIT FOR ANY RAIN DUE TO THE SEABREEZE, BUT AS SEEN
YESTERDAY CANNOT RULE OUT A STORM OR TWO FURTHER WEST. ANY ACTIVITY
WILL END NEAR SUNSET WITH THE LOSS OF DAYTIME HEATING.
LONG TERM
(TUESDAY THROUGH NEXT SUNDAY)
ISSUED AT 1258 PM CDT SUN SEP 13 2026
RIDGING REMAINS CENTERED OVER THE LOWER MISSISSIPPI AND TENNESSEE
VALLEYS THROUGH WEDNESDAY, THEN SHIFTS FURTHER WEST THURSDAY BEFORE
EXTENDING BACK TOWARDS SOUTH CENTRAL TEXAS LATE WEEK. TRIPLE DIGIT
HEAT CONTINUES TUESDAY FOR MUCH OF THE AREA, THEN HIGHS EASE
SLIGHTLY MID TO LATE WEEK, THOUGH STILL REMAIN ABOVE NORMAL FOR MID-
SEPTEMBER. WE'LL NEED TO KEEP AN EYE ON HEAT INDEX VALUES TUESDAY
AND POSSIBLY WEDNESDAY AS THEY STILL CREEP TOWARDS THE 105-108
DEGREE MARK ACROSS THE I-35 CORRIDOR AND COASTAL PLAINS. RAIN
CHANCES REMAIN LARGELY CONFINED TO THE COASTAL PLAINS EACH AFTERNOON
UNTIL A POTENTIAL SURGE IN MOISTURE/PWATS MOVES ACROSS THE AREA
THURSDAY BRINGING CHANCES FOR RAIN FURTHER INLAND.
AVIATION
(00Z TAFS)
ISSUED AT 605 PM CDT SUN SEP 13 2026
VFR CONDITIONS ARE FORECAST FOR ALL THE LOCAL TERMINALS THROUGH
LATE THIS EVENING. THEN, LOW MVFR CIGS DEVELOP OVERNIGHT AND STAY
THROUGH 15Z MONDAY, WITH THE PROJECTION OF AFFECTING ALL LOCAL
AIRPORTS AT SOME POINT THROUGH THAT PERIOD. BY LATE MONDAY
MORNING, VFR CIGS ARE FORECAST TO RETURN AND REMAIN INTO THE
AFTERNOON AND EVENING. NO EXPECTING SHOWERS OR THUNDERSTORMS TO
AFFECT TERMINAL THROUGH THIS NEW FORECAST CYCLE. ACTIVITY STAY
ACROSS THE COASTAL PLAINS. A SOUTHEAST FLOW OF 10 KNOTS OR SO IS
FORECAST TO DOMINATE THROUGH THE PERIOD FOR THE MOST PART.
PRELIMINARY POINT TEMPS/POPS
AUSTIN CAMP MABRY 78 101 78 102 / 20 10 0 0
AUSTIN BERGSTROM INTL AIRPORT 77 100 77 101 / 20 10 0 0
NEW BRAUNFELS MUNI AIRPORT 75 99 75 100 / 20 10 0 0
BURNET MUNI AIRPORT 74 97 74 98 / 20 10 0 0
DEL RIO INTL AIRPORT 77 100 77 102 / 0 0 0 0
GEORGETOWN MUNI AIRPORT 77 100 77 100 / 20 10 0 0
HONDO MUNI AIRPORT 75 99 75 100 / 20 10 0 0
SAN MARCOS MUNI AIRPORT 76 100 75 101 / 20 10 0 0
LA GRANGE - FAYETTE REGIONAL 77 99 77 100 / 20 20 10 10
SAN ANTONIO INTL AIRPORT 78 99 78 100 / 20 10 0 0
STINSON MUNI AIRPORT 78 101 77 102 / 20 10 0 0
EWX WATCHES/WARNINGS/ADVISORIES
HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR TXZ173-191>194-
205>209-220>225.
HEAT ADVISORY FROM NOON TO 7 PM CDT MONDAY FOR TXZ173-191>194-
205>209-220>225.
SHORT TERM...27
LONG TERM....27
AVIATION...17
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