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National Weather Service Forecast Discussion

552
FXUS64 KHGX 170507
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1207 AM CDT Fri Jul 17 2026

...New DISCUSSION, MARINE...

.KEY MESSAGES...

- Today will probably be the last day of mentionable rain chances
  for Southeast Texas for the next week or so.

- High pressure builds into the region this weekend and next week
  bringing dry weather.

- Temperatures, especially during the daytime, will trend upward
  and possibly flirt with the triple digits early-mid next week.

&&

.DISCUSSION...
Issued at 1207 AM CDT Fri Jul 17 2026

High pressure, both in the low and upper levels, will be making
its way westward into the region today into the weekend. We can`t
rule out a few isolated coastal showers this morning, and maybe a
tstm or two late in the day/evening (HRRR seems to like areas
between IAH and Lake Livingston), but overall rain chances will
continue on a downward trend for the majority of the area.

More sun and drier air also translates to increasing temperatures
unfortunately. Daytime highs will trend back into the mid 90s this
weekend. We might even need a further bump in the fcst and into the
95-100F degree range for some locations Mon-Wed. That`s when llvl
ridging should be centered just to our south...and favors a swly
flow which tends to allow readings to climb quickly.

Mid level ridging across the Rockies will sink ssewd during the
second part of the week that`ll reinforce the dry, hot wx for the
remainder of the work week.  47

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 627 PM CDT Thu Jul 16 2026

Iso-sct showers and storms will continue to push across SE Texas
through this evening and dissipate gradually as diurnal heating
and instability decreases. IFR-MVFR cigs/vis and VRB winds at
around 10-15 KTS with gusts up to 25 KTS are possible in storms.
Otherwise, expect winds to gradually decrease this evening,
relaxing to 5 KTS or less tonight into early Fri morning. Mostly
VFR conditions are expected throughout the nighttime hours,
however, some sites could see MVFR cigs early Fri morning for a
few hours along with isolated areas of patchy fog. Fog, if any is
expected to burn off around 14-15Z and cigs will gradually lift
and scatter out shortly after sunrise. Winds will be S-SE at 5-10
KTS on Fri.

Cotto

&&

.MARINE...
Issued at 1207 AM CDT Fri Jul 17 2026

SSE-S winds 10 to 15 knots and 2-4 foot seas should prevail across
the coastal waters today into Saturday. With high pressure moving
into the northwest Gulf later in the weekend, look for wind speeds
to diminish and take on a more southwesterly component at night and
in the mornings until the seabreeze kicks in. Corresponding wave
heights will also trend down closer to 2 feet Sunday and beyond.
47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  92  75  93  74 /  10  10   0   0
Houston (IAH)  94  78  95  76 /  30  30   0   0
Galveston (GLS)  91  83  91  82 /  20  10   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.

&&

$$

DISCUSSION...47
AVIATION...Cotto
MARINE...47

NWS HGX Office Area Forecast Discussion