408
FXUS64 KEWX 231847
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
147 PM CDT SUN AUG 23 2026
..NEW SHORT TERM, LONG TERM, AVIATION
KEY MESSAGES
UPDATED AT 141 PM CDT SUN AUG 23 2026
- EXTREME HEAT WARNING CONTINUES SUNDAY FOR THE NORTHERN
HILL COUNTRY, AUSTIN AREA AND INTO THE COASTAL PLAINS.
- HEAT ADVISORY CONTINUES THROUGH WEDNESDAY FOR PORTIONS OF THE
HILL COUNTRY, I-35 CORRIDOR, AND COASTAL PLAINS.
SHORT TERM
(TONIGHT THROUGH MONDAY NIGHT)
ISSUED AT 141 PM CDT SUN AUG 23 2026
THE HEAT WILL CONTINUE TO BE THE MAIN FOCUS THROUGH MID-WEEK AS
TEMPERATURES REMAIN ABOVE NORMAL. A STRONG RIDGE OF HIGH PRESSURE
REMAINS CENTERED OVER THE SOUTHERN ROCKY MOUNTAINS AND THIS WILL
BE THE MAIN INFLUENCER OF OUR WEATHER PATTERN. THE EXTREME HEAT
WARNING FOR THE NORTHERN HILL COUNTRY, AUSTIN AREA AND SOUTHWARD
INTO THE COASTAL PLAINS WILL REMAIN IN EFFECT UNTIL 7 PM CDT
SUNDAY. A HEAT ADVISORY ALSO CONTINUES TODAY FOR PORTIONS OF THE
HILL COUNTRY, I-35 CORRIDOR AND COASTAL PLAINS. HIGHS ARE STILL ON
TRACK TO TOP OUT IN THE 103 TO 107 DEGREE RANGE FOR AREAS UNDER
THE EXTREME HEAT WARNING AND HEAT ADVISORY.
FOR MONDAY (THROUGH WEDNESDAY), WE WILL CONTINUE THE CURRENT HEAT
ADVISORY FOR PORTIONS OF THE HILL COUNTRY, I-35 CORRIDOR, AND
COASTAL PLAINS. WHILE A FEW SPOTS MAY APPROACH 105 DEGREES (MAINLY
NORTHERN HILL COUNTRY TO NEAR AUSTIN), CONFIDENCE IS NOT QUITE
HIGH ENOUGH TO GO WITH ANOTHER EXTREME HEAT WARNING AT THIS TIME.
LONG TERM
(TUESDAY THROUGH NEXT SUNDAY)
ISSUED AT 141 PM CDT SUN AUG 23 2026
THE ABOVE MENTIONED RIDGE OF HIGH PRESSURE WILL CONTINUE TO REMAIN
THE DOMINANT WEATHER FEATURE THROUGH MUCH OF THIS WEEK. THERE ARE
SOME INDICATIONS THAT CONVECTION TO OUR NORTH COULD SEND A WEAK
OUTFLOW BOUNDARY SOUTHWARD LATE WEDNESDAY. CONFIDENCE IS LOW, BUT
WE WILL MONITOR AS THE BOUNDARY MAY ALLOW A SURFACE FOCUS FOR
CONVECTIVE INITIATION. IN ADDITION, MODELS GENERALLY SHOW A DECENT
SIGNAL FOR AN INCREASE IN MID AND UPPER LEVEL CLOUD COVER
WEDNESDAY INTO THURSDAY AS THE MID-LEVEL FLOW BRIEFLY TRENDS BACK
TO A NORTHWESTERLY DIRECTION. WEAK DISTURBANCES EMBEDDED IN
NORTHWEST FLOW ALOFT ALWAYS BEAR WATCHING AND FOR NOW WE WILL KEEP
SOME LOW RAIN CHANCES (20-30%) IN THE FORECAST THURSDAY AFTERNOON
AND EVENING ACROSS THE HILL COUNTRY INTO THE I-35 CORRIDOR FROM
NEAR SAN MARCOS NORTHWARD. SOME LOW RAIN CHANCES FOR THE SAME
AREAS COULD LINGER INTO FRIDAY, BUT OVERALL CONFIDENCE IN THIS IS
RATHER LOW.
LATE IN THE FORECAST PERIOD, THE FLOW ALOFT SHOULD TREND BACK TO A
MORE NORTH TO NORTHEASTERLY DIRECTION, WHICH TYPICALLY DOES NOT
FAVOR ANY RAINFALL CHANCES. TEMPERATURES WILL REMAIN WELL ABOVE
NORMAL THROUGH THE PERIOD AND ADDITIONAL HEAT HEADLINES WILL BE
OUR MAIN CONCERN.
AVIATION
(18Z TAFS)
ISSUED AT 141 PM CDT SUN AUG 23 2026
THE NEXT 24-30 HOURS WILL BE A REPEAT OF THE LAST FEW DAYS WITH NO
MAJOR IMPACTS TO AREA AIRPORTS. ALL TERMINALS WILL BE VFR THROUGH
THE PERIOD WITH ONLY SOME OCCASIONAL HIGH CLOUDS. WINDS WILL BE
GENERALLY LESS THAN 10 KTS FROM A SOUTHERLY DIRECTION. WE COULD SEE
OCCASIONAL GUSTS FROM 10-15 KTS, BUT NOT CONSISTENT ENOUGH TO
INCLUDE IN THE TAFS.
PRELIMINARY POINT TEMPS/POPS
AUSTIN CAMP MABRY 80 105 77 105 / 0 0 0 0
AUSTIN BERGSTROM INTL AIRPORT 79 104 77 104 / 0 0 0 0
NEW BRAUNFELS MUNI AIRPORT 77 103 75 102 / 0 0 0 0
BURNET MUNI AIRPORT 76 103 74 102 / 0 0 0 0
DEL RIO INTL AIRPORT 78 104 77 103 / 0 0 0 0
GEORGETOWN MUNI AIRPORT 79 104 77 103 / 0 0 0 0
HONDO MUNI AIRPORT 75 101 74 101 / 0 0 0 0
SAN MARCOS MUNI AIRPORT 76 103 75 103 / 0 0 0 0
LA GRANGE - FAYETTE REGIONAL 77 104 77 104 / 0 0 0 0
SAN ANTONIO INTL AIRPORT 77 102 76 102 / 0 0 0 0
STINSON MUNI AIRPORT 77 104 76 104 / 0 0 0 0
EWX WATCHES/WARNINGS/ADVISORIES
EXTREME HEAT WARNING UNTIL 7 PM CDT THIS EVENING FOR TXZ171>173-
192>194-208-209-223-225.
HEAT ADVISORY FROM 7 PM THIS EVENING TO 7 PM CDT WEDNESDAY FOR
TXZ171>173-192>194-208-209-223-225.
HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR TXZ187-189-190-204-
219.
HEAT ADVISORY UNTIL 7 PM CDT WEDNESDAY FOR TXZ191-205>207-
220>222-224.
SHORT TERM...05
LONG TERM....05
AVIATION...PLATT
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