261
FXUS64 KEWX 221819
AFDEWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
119 PM CDT SAT AUG 22 2026
..NEW SHORT TERM, LONG TERM, AVIATION
KEY MESSAGES
UPDATED AT 117 PM CDT SAT AUG 22 2026
- HEAT ADVISORY CONTINUES FOR THE NORTHERN HILL COUNTRY,
I-35 CORRIDOR, AND COASTAL PLAINS THROUGH SUNDAY.
- ISOLATED SHOWERS AND STORMS POSSIBLE MAINLY OVER THE NORTHERN
HILL COUNTRY THIS AFTERNOON.
- HOT AND DRY WEATHER WILL PERSIST THROUGH THE UPCOMING WEEK.
SHORT TERM
(TONIGHT THROUGH SUNDAY NIGHT)
ISSUED AT 117 PM CDT SAT AUG 22 2026
MID AND UPPER LEVEL HIGH PRESSURE CENTERED OVER THE SOUTHERN U.S.
ROCKIES WILL REMAIN THE DOMINANT WEATHER FEATURE TO INFLUENCE THE
WEATHER PATTERN ACROSS SOUTH CENTRAL TEXAS. THE WILL RESULT IN
CONTINUED ABOVE NORMAL TEMPERATURES ACROSS SOUTH CENTRAL TEXAS.
THE HEAT ADVISORY CONTINUES THROUGH SUNDAY EVENING. WE WILL KEEP A
LOW CHANCE (20%) FOR AN ISOLATED SHOWER OR STORM ACROSS PORTIONS
OF THE NORTHERN HILL COUNTRY (MAINLY LLANO AND BURNET COUNTIES)
THROUGH THIS AFTERNOON AS DAYTIME HEATING ALONG WITH A NEARBY MID-
LEVEL THETA-E RIDGE AXIS COULD BE ENOUGH TO HELP INITIATE SOME
ISOLATED CONVECTION THIS AFTERNOON. IF THESE ISOLATED CELLS MANAGE
TO DEVELOP, SOME GUSTY WINDS WILL BE IN STORE GIVEN THE HIGH-BASED
NATURE OF THE CONVECTION.
LONG TERM
(MONDAY THROUGH NEXT SATURDAY)
ISSUED AT 117 PM CDT SAT AUG 22 2026
FOR MUCH OF THE UPCOMING WEEK, MID AND UPPER LEVEL HIGH PRESSURE
REMAINS ANCHORED OVER THE SOUTHERN ROCKIES INTO NORTHERN MEXICO.
TIME SERIES PLOTS OF MODEL DERIVED 850 MB TEMPERATURES SHOW LITTLE
CHANGE THROUGH THE WEEK. BASED ON THE CURRENT GUIDANCE, WE MAY
NEED TO EXTEND THE CURRENT HEAT ADVISORY FURTHER IN TIME IF MODELS
CONTINUE TO REMAIN CONSISTENT. HIGH TEMPERATURES WILL LIKELY
REMAIN IN THE UPPER 90S TO NEAR 106 DEGREES ALONG WITH OVERNIGHT
LOWS IN THE 70S.
AVIATION
(18Z TAFS)
ISSUED AT 117 PM CDT SAT AUG 22 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 A FEW LOW CLOUDS SUNDAY MORNING. WINDS WILL BE
LESS THAN 10 KTS FOR A SOUTHERLY DIRECTION.
PRELIMINARY POINT TEMPS/POPS
AUSTIN CAMP MABRY 80 104 78 104 / 0 0 0 0
AUSTIN BERGSTROM INTL AIRPORT 79 104 78 104 / 0 0 0 0
NEW BRAUNFELS MUNI AIRPORT 77 103 75 103 / 0 0 0 0
BURNET MUNI AIRPORT 77 103 75 103 / 0 0 0 0
DEL RIO INTL AIRPORT 78 104 77 103 / 0 0 0 0
GEORGETOWN MUNI AIRPORT 80 104 78 104 / 0 0 0 0
HONDO MUNI AIRPORT 76 103 73 102 / 0 0 0 0
SAN MARCOS MUNI AIRPORT 77 103 75 103 / 0 0 0 0
LA GRANGE - FAYETTE REGIONAL 77 104 76 103 / 0 0 0 0
SAN ANTONIO INTL AIRPORT 78 103 76 103 / 0 0 0 0
STINSON MUNI AIRPORT 77 105 76 103 / 0 0 0 0
EWX WATCHES/WARNINGS/ADVISORIES
HEAT ADVISORY UNTIL 7 PM CDT SUNDAY FOR TXZ171>173-191>194-
205>209-220>225.
SHORT TERM...05
LONG TERM....05
AVIATION...PLATT
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