Austin, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

679
FXUS64 KEWX 251741
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
1241 PM CDT Sat Apr 25 2026

...New AVIATION...

.KEY MESSAGES...

- Hot and humid weather over the weekend and continues into early
  next week with heat indices near or exceeding 100F.

- Low chances (15-20 percent) for isolated severe storms late
  afternoons into early evenings over the weekend. &&

.SHORT TERM...
(Today through Sunday)
Issued at 122 AM CDT Sat Apr 25 2026

Low clouds come back across most of South Central Texas overnight
and stay through mid to late Saturday morning before breaking. Also,
patchy to areas of fog are forecast to develop overnight into
Saturday morning. Can`t rule out some areas where patchy dense fog
occurs. Another hot and humid day is in store with highs ranging
from the low to upper 90s and heat index values in the mid to upper
90s along the I-35 Corridor, Coastal Plains, and up to 101 along the
Rio Grande.

Most of the afternoon should stay rain-free as the cap holds with
partly cloudy skies. However, there is a critical time frame and
that is from around 4 PM to about 8 PM, if the cap breaks, isolated
strong to marginally severe storms could develop ahead of the dry-
line. Those locations are from the Hill Country to the southwest
into the Rio Grande. The main severe hazards looking to be large
hail and damaging wind gusts. A tornado can`t be ruled out, however,
low probability of occurrence. If these storms develop, the activity
should come to an end around 8 PM as the daytime heating comes to an
end.

Clouds return overnight through Sunday morning with lows in the mid
to upper 60s and low 70s. Patchy to areas of fog are anticipated to
form across the Coastal Plains, the I-35 Corridor, and the southern
Edwards Plateau. Once again, another hot and humid day is in store
for Sunday afternoon with highs in the mid to upper 90s for most
areas. Humidity levels increase as well as the heat index values
ranging from the mid to upper 90s along and east of the I-35
Corridor and up to 105 over the southern part of the Rio Grande.
In addition, conditional instability could play a role during the
late afternoon with help the cap to break and allow for isolated
strong to marginally severe storms. If the cap breaks, the favoring
areas for storm development are the southern Edwards Plateau and the
Rio Grande.

&&

.SHORT TERM...
(Today through Sunday)
Issued at 122 AM CDT Sat Apr 25 2026

Low clouds come back across most of South Central Texas overnight
and stay through mid to late Saturday morning before breaking. Also,
patchy to areas of fog are forecast to develop overnight into
Saturday morning. Can`t rule out some areas where patchy dense fog
occurs. Another hot and humid day is in store with highs ranging
from the low to upper 90s and heat index values in the mid to upper
90s along the I-35 Corridor, Coastal Plains, and up to 101 along the
Rio Grande.

Most of the afternoon should stay rain-free as the cap holds with
partly cloudy skies. However, there is a critical time frame and
that is from around 4 PM to about 8 PM, if the cap breaks, isolated
strong to marginally severe storms could develop ahead of the dry-
line. Those locations are from the Hill Country to the southwest
into the Rio Grande. The main severe hazards looking to be large
hail and damaging wind gusts. A tornado can`t be ruled out, however,
low probability of occurrence. If these storms develop, the activity
should come to an end around 8 PM as the daytime heating comes to an
end.

Clouds return overnight through Sunday morning with lows in the mid
to upper 60s and low 70s. Patchy to areas of fog are anticipated to
form across the Coastal Plains, the I-35 Corridor, and the southern
Edwards Plateau. Once again, another hot and humid day is in store
for Sunday afternoon with highs in the mid to upper 90s for most
areas. Humidity levels increase as well as the heat index values
ranging from the mid to upper 90s along and east of the I-35
Corridor and up to 105 over the southern part of the Rio Grande.
In addition, conditional instability could play a role during the
late afternoon with help the cap to break and allow for isolated
strong to marginally severe storms. If the cap breaks, the favoring
areas for storm development are the southern Edwards Plateau and the
Rio Grande.

&&

.LONG TERM...
(Sunday night through Friday)
Issued at 122 AM CDT Sat Apr 25 2026

Once the daytime heating ends, any storm around the local area won`t
last long. Under surface flow regime, the story repeats with low
clouds developing late night into Monday morning. The heat continues
with highs in the 90s across South Central Texas and heat indices
near and exceeding the 100 mark. Can`t rule out a few storms over
the Hill Country and the southern Edwards Plateau as the dry-line
sits over Val Verde County.

More rain chances come on Tuesday as the dry-line moves into the
eastern third of South Central Texas and a frontal boundary gets
closer to the Hill Country. In addition, high temperatures are
likely to be to highest for the new week ranging from the mid to
upper 90s and up to 103 over the southern part of the Rio Grande.
Heat index values are forecast to range from 103 to 105 along the I-
35 Corridor to 108 along the Rio Grande. Chances for rain continue
on Wednesday and Thursday as a frontal boundary pushes into our
local area.

&&

.AVIATION...
(18Z TAFS)
Issued at 1230 PM CDT Sat Apr 25 2026

Haze appears to be spreading in from the south and affecting the
morning to midday TAF sites. This type of air mass further
strengthens the capping inversion so we`ll avoid any mention of
storms for now. Low clouds tonight should also follow the pattern
for persistence, and we`ll go back to avoiding IFR CIGs for now.
Gridded population blends also favor a more conservative trend for
tonight`s clouds.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              92  72  92  73 /  10  10  10  10
Austin Bergstrom Intl Airport  92  71  92  72 /  10  10  10  10
New Braunfels Muni Airport     91  70  92  71 /  10  10  10  10
Burnet Muni Airport            91  70  92  71 /  20  20  10  10
Del Rio Intl Airport           96  72  98  75 /  10  10   0  10
Georgetown Muni Airport        91  71  92  72 /  10  20  10  10
Hondo Muni Airport             94  69  94  70 /  20  20  10  10
San Marcos Muni Airport        92  70  92  72 /  10  10  10  10
La Grange - Fayette Regional   91  72  91  73 /   0   0   0   0
San Antonio Intl Airport       92  71  93  72 /  10  10  10  10
Stinson Muni Airport           93  72  94  73 /  10  10  10  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...17
LONG TERM....17
AVIATION...18