398
FXUS64 KEWX 130006
AFDEWX
Area Forecast Discussion
National Weather Service Austin/San Antonio TX
706 PM CDT Wed Aug 12 2026
...New AVIATION...
.KEY MESSAGES...
Updated at 630 PM CDT Wed Aug 12 2026
- Hot and mostly dry summer weather continues this week. Practice
heat safety and stay cool and hydrated.
&&
.SHORT TERM...
(Tonight through Thursday night)
Issued at 122 PM CDT Wed Aug 12 2026
Rinse and repeat hot summer weather, minus the rinsing, persists for
South Central Texas. GOES-derived soundings show a broad plume of
drier air is being swept into our area by the dominant ridge in the
Gulf. Mostly clear skies are forecast during the early part of
the night across the region. This should provide initially good
viewing for the Perseids meteor shower, which peaks after midnight
with occasional meteors emanating from the northeast. However, we
do expect cloud cover to gradually trend from clear skies around
midnight to cloudier skies in pre-dawn hours as the typical low
stratus builds along and east of the I-35 corridor with some
extension into the southern Hill Country. Modeled low-level
humidity profiles do suggest moisture tonight will be slightly
lower than the other nights this week, so perhaps the overall
nocturnal cloud cover could be slightly better compared to what
we`ve seen so far. Expect mild temperatures in the 70s during the
late night and early morning.
Thursday will be hot and dry again. Drier mid-level air may slightly
aid in alleviating the heat, but temperatures are expected to stay
hot with highs in the 99 to 103 range for most of the area. Peak
afternoon heat indices should reach the 104 to 108 range below the
Balcones Escarpment and along the Rio Grande. Breezy afternoon winds
are also expected to reach their apex on Thursday thanks to a strong
pressure gradient enforced by high pressure over the Gulf and hot
temperatures over the Central Plains. Breezy winds southeast of 10-
20 mph with gusts to 25-30 mph are possible throughout the
daytime.
&&
.LONG TERM...
(Friday through next Wednesday)
Issued at 122 PM CDT Wed Aug 12 2026
Little substantive change is expected in the weather over the next
several days. Conditions remain hot and opportunities for rain will
be hard to come by as ridging strengthens over the area. Afternoon
breezes are expected to trend downward after Friday as high pressure
over the Gulf broadens. A weak inverted trough is forecast to
move onshore South Texas on Friday. The increase in moisture may
be accompanied by isolated showers from the Coastal Plains to
Winter Garden region, though rain chances are low (below 30
percent). That may be our only window for rain within the next 10
days. The more noteworthy change is that the passing disturbance
could raise heat indices by a few degrees, especially over the
Coastal Plains and I35 corridor where conditions could meet Heat
Advisory criteria. Moisture is expected to decrease over the
weekend into next week, but hot weather will continue to prevail
with highs regularly straddling 100F.
&&
.AVIATION...
(00Z TAFS)
Issued at 630 PM CDT Wed Aug 12 2026
Southeasterly flow will continue through the next TAF period, and
the pattern of overnight low ceilings and afternoon scattered
clouds will continue also. Ceilings are probable in San Antonio,
intermittent in Austin, and unlikely in Del Rio. Wind gusts will
drop off after sunset, but speeds will stay around 10 kts
overnight. Gusty winds will return late morning Thursday.
&&
.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry 77 101 77 98 / 0 0 0 10
Austin Bergstrom Intl Airport 77 101 77 99 / 0 0 0 10
New Braunfels Muni Airport 76 101 76 98 / 0 0 0 10
Burnet Muni Airport 74 98 74 96 / 0 0 0 0
Del Rio Intl Airport 78 102 77 99 / 0 0 0 0
Georgetown Muni Airport 76 100 76 97 / 0 0 0 10
Hondo Muni Airport 75 100 75 97 / 0 0 0 10
San Marcos Muni Airport 76 101 76 98 / 0 0 0 10
La Grange - Fayette Regional 77 100 77 98 / 0 0 10 20
San Antonio Intl Airport 77 100 78 97 / 0 0 0 10
Stinson Muni Airport 77 102 78 99 / 0 0 0 10
&&
.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
SHORT TERM...Tran
LONG TERM....Tran
AVIATION...05
No recent Short Term Forecast (NOW) has been issued for NWS Austin/San Antonio CWA (EWX).
Special Weather Statement Issued: 08/10/2026 05:18:00 AM UTC
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