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National Weather Service Forecast Discussion

051
FXUS64 KHGX 251556
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1056 AM CDT Sat Jul 25 2026

...New DISCUSSION, MARINE...

.KEY MESSAGES...

- Dangerous heat building this week with temperatures in the
  upper 90s/100s and heat indices of 104-112F. Heat Advisories
  likely at times.

- Patchy fog possible during the early to mid-morning hours for at
  least the next few days.

&&

.DISCUSSION...
Issued at 932 AM CDT Sat Jul 25 2026

The main story for this upcoming week (and potentially longer)
will be the heat and humidity that continues to build into the
region. A strong upper-level ridge over the Southern Plains will
dominate our weather pattern this week causing above normal
temperatures with high temperatures in the upper 90s to low 100s
and overnight lows in the mid mid to upper 70s inland and low 80s
at the coast. Afternoon heat indices will rise into the 104-109
range through Monday, then increase higher by midweek. There will
be an increasing risk each day for the need of a Heat Advisory
with Heat Advisories very likely by Wednesday.

As of right now, tomorrow looks to have the best chance for some
isolated afternoon showers and thunderstorms developing along the
sea breeze. This is thanks to increased daytime heating,
increasing PWATs, and some PVA moving into the region from a weak
upper-level disturbance sliding in from the northeast. While we
cannot out-rule very isolated afternoon activity this week thanks
to daytime heating, rain chance will remain near zero thanks to
that dominating high pressure.

Fowler

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 623 AM CDT Sat Jul 25 2026

Some patchy MVFR fog/ceilings around the region should burn off
by mid morning. Otherwise, VFR conditions will prevail the
remainder of the day with some high cloudiness tracking in from
the north and northeast. Intermittent MVFR fog/ceilings again
possible late tonight and early Sunday morning. 47

&&

.MARINE...
Issued at 932 AM CDT Sat Jul 25 2026

South to southwesterly winds around 10-15kt with low seas will
prevail through much of this upcoming week. No significant weather
concerns expected.

Fowler

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  75  96  77  98 /   0   0   0   0
Houston (IAH)  77  97  79 100 /   0  20   0   0
Galveston (GLS)  83  90  82  93 /   0  10   0   0

&&

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

$$

DISCUSSION...Fowler
AVIATION...47
MARINE...Fowler

NWS HGX Office Area Forecast Discussion