959
FXUS64 KEWX 281832
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
132 PM CDT Tue Jul 28 2026

...New SHORT TERM, LONG TERM...

.KEY MESSAGES...
Updated at 125 PM CDT Tue Jul 28 2026

- Heat Advisory in effect for the Coastal Plains and portions of
  the Rio Grande Plains today through 7 PM.

- Hot and rain-free weather is expected through the end of July.

- The combination of hot afternoons, mild nights, and humid
  conditions may lead to increasing heat risks this week and into
  the weekend.

&&

.SHORT TERM...
(Tonight through Wednesday night)
Issued at 125 PM CDT Tue Jul 28 2026

South Central Texas remains under the influence of mid level
ridging aloft, which will maintain hot afternoons, mild and humid
nights, and rain-free conditions through the forecast period.
Temperatures are expected to be near or slightly above seasonal
normals for late July, with highs expected to warm into the mid to
upper 90s each afternoon and a few areas across the Rio Grande
Plains reaching the triple-digits. Another round of stratus clouds
is expected to develop tonight across portions of the region,
keeping overnight lows in the mid to upper 70s, before scattering
out by mid to late morning on Wednesday. A few areas across the
Hill Country may stay partly to mostly clear, allowing for lows to
fall into the low 70s tonight.

Another hot afternoon with abundant sunshine is in store across
the region on Wednesday. High temperatures once again will warm
into the mid to upper 90s across most of the region, with the
exception being across the Rio Grande Plains in the 100-103 range.
Deeper afternoon mixing should allow for slightly lower dew
points Wednesday afternoon, resulting in heat index values ranging
from 95-105 degrees across the southern Edwards Plateau and Hill
Country, and closer to 103-107 degrees along and east of the I-35
corridor. While these values along and east of the I-35 corridor
are just below Heat Advisory criteria, continue to practice heat
safety as the combination of a prolonged period hot afternoons and
mild nights will result in an increased risk for heat-related
illnesses for anyone spending time outdoors.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 125 PM CDT Tue Jul 28 2026

Seasonably hot temperatures and triple-digit heat indices will be
the main weather story across South Central Texas heading into
the weekend as the region remains under the influence of mid level
ridging centered over the Desert Southwest. Temperatures will
gradually rise each afternoon, with widespread highs approaching
the triple-digits (100-103 degrees) by Thursday and Friday.
Slightly lower humidity should keep heat indices just below heat
advisory through the end of the week. However, humidity is
expected to increase this weekend in combination with the triple-
digit heat, which may result in the issuance of heat headlines
across portions of the region.

Mid level ridging is expected to shift west late this weekend and
into early next week, which may open the door for the return of
low precipitation chances as upper level trough translates across
the Plains and sends a cold front southward. However, there
remains uncertainty among guidance on this setup so continue to
check back for updates.

&&

.AVIATION...
(18Z TAFS)
Issued at 1237 PM CDT Tue Jul 28 2026

Mostly VFR thru the period. FEW to SCT Cu 3-5kft thru the
afternoon with a period of MVFR likely btwn 08z-15z. SE to SW
wind 6-12kts with iso gusts of 18-22kts psbl at AUS/SAT thru 02z.
Winds should largely diminish after 02z.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              77  99  77  99 /   0   0   0   0
Austin Bergstrom Intl Airport  76  99  77  99 /   0   0   0   0
New Braunfels Muni Airport     75  99  75  99 /   0   0   0   0
Burnet Muni Airport            74  97  74  98 /   0   0   0   0
Del Rio Intl Airport           79 100  79 102 /   0   0   0   0
Georgetown Muni Airport        76  98  77 100 /   0   0   0   0
Hondo Muni Airport             75  98  75  99 /   0   0   0   0
San Marcos Muni Airport        75  99  75 100 /   0   0   0   0
La Grange - Fayette Regional   76 100  76 100 /   0   0   0   0
San Antonio Intl Airport       77  99  77  99 /   0   0   0   0
Stinson Muni Airport           77  99  77  99 /   0   0   0   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for TXZ193-194-208-209-
217>225-228.

&&

$$

SHORT TERM...Garcia
LONG TERM....Garcia
AVIATION...99