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National Weather Service Forecast Discussion

021
FXUS64 KHGX 182329
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
629 PM CDT Sun Oct 18 2026

...New AVIATION...

.KEY MESSAGES...

- Another cool and dry day expected for the rest of Sunday.

- Hazardous marine conditions persist offshore. Small craft
  should exercise caution until 7 PM CDT this evening. Conditions
  will continue improving overnight into Monday.

- Warmer temperatures return this week, but just seasonable in
  nature. Rain chances will generally remain low across our CWA
  outside of Tuesday, where a passing Gulf trough could bring rain
  to our offshore waters and Matagorda Bay.

&&

.DISCUSSION...
Issued at 140 PM CDT Sun Oct 18 2026

As high pressure sits overhead, the rest of Sunday will look similar
to Saturday, albeit a bit warmer. We can expect clear to partly
cloudy skies, highs in the low to mid 70s, and overnight lows in the
50s, with coastal locations seeing warmer lows in the 60s. Winds
remain somewhat elevated offshore, with recent measurements offshore
of Matagorda County indicating sustained winds of 20-25 mph and
gusts beyond that range. Therefore, small crafts should exercise
caution throughout the afternoon and evening hours.

Looking toward the upcoming work week, ridging to our NE will
provide easterly flow that will allow temperatures to warm back up.
The combination of ridging near the surface and in the mid-levels to
our SW will also keep us pretty dry, as evident in forecasted PWATs
generally staying under 1.5``. Therefore, PoPs through the week will
likely remain under 10%, with a notable exception on Tuesday as a
passing surface trough in the Gulf will likely bring rain to our
offshore waters, and possibly Matagorda Bay.

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 627 PM CDT Sun Oct 18 2026

VFR conditions prevail through the period. Winds will become light
and variable overnight and will increase to 10-15 knots Monday
morning around 14Z. GLS may experience an increase in winds
earlier in the overnight hours around 09Z.

Bailey

&&

.MARINE...
Issued at 140 PM CDT Sun Oct 18 2026

As high pressure transitions off to our east, a long fetch of
moderate easterly winds will set up across the northern Gulf Coast
this week. Speeds will generally be between 10 and 20 knots and
seas in the 3 to 5 foot range through midweek, though there could
be some intermittent periods of slightly higher speeds and seas in
the offshore Gulf waters which could warrant caution or advisory
flags for short time periods.

47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  52  77  55  82 /   0   0   0   0
Houston (IAH)  58  78  59  82 /   0   0   0   0
Galveston (GLS)  70  77  72  79 /  10   0   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...Small Craft Should Exercise Caution until 7 PM CDT this evening
     for GMZ370-375.

&&

$$

DISCUSSION...JMG
AVIATION...Bailey
MARINE...47

NWS HGX Office Area Forecast Discussion