San Antonio, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

662
FXUS64 KEWX 040819
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
219 AM CST Wed Dec 4 2024

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

.SHORT TERM...
(Today through Thursday)
Issued at 144 AM CST Wed Dec 4 2024

A coastal low roughly near CRP early this morning has an associated
shear axis that runs up I-37 to San Antonio and northward into the
eastern Hill Country. This corridor is where shower activity will be
most concentrated through 4 AM, but the axis shifts east of the I-35
Corridor by late morning. Rainfall amount projections from most
model data has been consistently light with most areas expected to
get less than 0.15 inches. Temperatures will become milder over most
areas, as dew points from SE and E winds increase with the light
falling rain. An exception for today is near and north of Austin
where NE surface winds have maintained lower dewpoints which will
interact with the light rain with evaporative cooling effects.

The coastal low and weak mid level shortwave pulls to the east
tonight to leave a mostly stable picture for tonight into Thursday.
The still damp air and mostly cloudy skies should make for mild
morning lows, even over the northern counties that eventually see
the higher dew points return. Daytime temperatures will be mostly
flat for Thursday, since another cold front will slip into the area
gradually. This will solidify the shallow overrunning pattern, but
not enough to generate any meaningful rainfall in the short term
period. Deeper moisture will begin pooling up along the Rio Grande
again, which should bode well for increasing rain chances just
outside the short term.

&&

.LONG TERM...
(Thursday night through Tuesday)
Issued at 144 AM CST Wed Dec 4 2024

Precipitation chances increase Thursday night and stick around
through the weekend as a cut-off upper low remains west of South
Central Texas centered in the vicinity of northern Mexico and the
far southwestern US. Ahead of this feature, increasing low to mid
level moisture and a series of weak shortwaves will lead to periods
of showers and thunderstorms across the area. Generally rainfall
looks to be light or moderate through the period, but some isolated
heavy rainfall will be possible. Ensemble guidance gives the best
probabilities for more significant 24 hour rainfall (>0.25 inches)
Saturday into Sunday. This closed low lifts northeast into the
Central Plains Sunday with rain chances and overcast skies
dissipating from west to east through Sunday night. Monday through
the middle of next week will be primarily dry with mostly clear to
partly cloudy skies.

For temperatures, highs Friday and Saturday will be some of the
coldest we have seen this season. Highs range from the upper 40s to
low 60s with a warm up Sunday and Monday. Another front is forecast
to move across the area sometime on Tuesday, most likely earlier in
the morning. Northerly wind will bring cooler air and cold overnight
lows in the wake of the front. Will need to watch for overnight
freezing temperatures for some of our northern areas early next week.

&&

.AVIATION...
(06Z TAFS)
Issued at 936 PM CST Tue Dec 3 2024

CIGs lowering to MVFR this evening will lower to IFR, possibly LIFR
with restrictions to VSBY overnight into morning as SHRA increase
moistening the lower levels. After the SHRA move off to the east,
CIGs/VSBYs will rise to MVFR at the I-35 sites and VFR at KDRT
Wednesday afternoon. Winds will be light at 7 KTs or less.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              65  54  64  43 /  70  10  10  10
Austin Bergstrom Intl Airport  65  54  65  43 /  70  10  10  10
New Braunfels Muni Airport     70  56  68  45 /  60  10  10  10
Burnet Muni Airport            63  50  62  40 /  60  10  10  10
Del Rio Intl Airport           71  53  69  52 /   0   0  10  30
Georgetown Muni Airport        62  52  63  41 /  70  10  10  10
Hondo Muni Airport             70  54  66  47 /  20  10  10  20
San Marcos Muni Airport        67  55  65  44 /  70  10  10  10
La Grange - Fayette Regional   70  55  66  44 /  70  20  10  10
San Antonio Intl Airport       69  56  66  47 /  40  10  10  20
Stinson Muni Airport           71  58  67  49 /  40  10  10  20

&&

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

$$

Short-Term...18
Long-Term...27
Aviation...04