647
FXUS64 KSJT 181817
AFDSJT

Area Forecast Discussion
National Weather Service San Angelo TX
117 PM CDT Tue Aug 18 2026

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

.KEY MESSAGES...

- Hot and dry weather will persist through this week and into the
  beginning of next week.

- A heat advisory is in effect for the Big Country for both this
  afternoon and again on Wednesday afternoon.

&&

.SHORT TERM...
(This evening through Wednesday)
Issued at 1259 PM CDT Tue Aug 18 2026

Nothing really changing in the air mass over the next 24 hours, so
little change in the expected forecast. Lighter overnight wind
speeds and a little drier dewpoints allowed morning lows to drop
into the mid and upper 60s across the Concho Valley south into the
Hill Country and Edwards Plateau. Model blends forecasting lows
well up in the 70s and this just seems to warm given the same
lower wind speeds and dewpoints tonight. Trimmed morning lows back
a few degrees to better match this mornings lows. Otherwise,
tomorrows highs will be very near the same as today. Current Heat
Advisory runs through sunset this evening, and with similar
conditions for tomorrow, went ahead and issued another Heat
Advisory for the same areas for tomorrow afternoon.

&&

.LONG TERM...
(Wednesday night through next Tuesday)
Issued at 1259 PM CDT Tue Aug 18 2026

Upper level ridge remains the main story across the Southern
PLains with no real end in sight. Ridge does shift just far enough
west that northerly flow and a weak shortwave are able to drop
south into North Texas on Saturday. Earlier model runs were
generating a few showers and storms across the area, but this
mornings model blends have shrunk those small POPs down even more
as the upper level ridge axis holds on a little stronger. Given
these summer ridges usually hold on stronger, not going to put
POPs back into the forecast at this point but will continue to
monitor the situation. Otherwise, hot conditions to continue with
very little change in temperatures.

&&

.AVIATION...
(18Z TAFS)
Issued at 1210 PM CDT Tue Aug 18 2026

VFR conditions and generally clear skies are expected through the
next 24 hours. Winds this afternoon will be from the south to
southeast, at 9-11 knots with a few higher gusts (to near 18
knots) at times. Light south winds are expected tonight for our
southern terminals, and KABI/KSJT will have southeast to south
winds near 8 knots. On Wednesday morning, expect south to
southwest winds 8-11 knots 14Z-18Z at our TAF sites.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene     77 103  78 103 /   0   0   0   0
San Angelo  74 101  74 102 /   0   0   0   0
Junction    73  99  73 100 /   0   0   0   0
Brownwood   73 102  75 102 /   0   0   0   0
Sweetwater  77 104  76 104 /   0   0   0   0
Ozona       71  96  72  97 /   0   0   0   0
Brady       75  99  73 100 /   0   0   0   0

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for Callahan-Fisher-
Haskell-Jones-Nolan-Shackelford-Taylor-Throckmorton.

Heat Advisory from 1 PM to 7 PM CDT Wednesday for Callahan-
Fisher-Haskell-Jones-Nolan-Shackelford-Taylor-Throckmorton.

&&

$$

SHORT TERM...07
LONG TERM....07
AVIATION...19