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National Weather Service Forecast Discussion

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240
FXUS64 KHGX 251832
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
132 PM CDT Thu Jun 25 2026

...New DISCUSSION, MARINE...

.KEY MESSAGES...

- Seasonably hot conditions will continue through the weekend.
  Peak heat index values between 102-107F (39-42C) through Sunday.

- Rain chances re-enter the forecast early-mid next week.

&&

.DISCUSSION...
Issued at 132 PM CDT Thu Jun 25 2026

Mid-upper ridging centered over northern Mexico and West Texas
will drift east and become repositioned over the Lower Mississippi
Valley this weekend. Despite prevailing southerly llvl winds and
muggy conditions, subsidence aloft should mostly inhibit precip
development. Partly cloudy and some intermittently hazy
conditions are anticipated with daytime temperatures in the low-
mid 90s. Heat indices should peak slightly below advisory criteria
(108F/42C). Winds in the 10-15mph range should provide some
limited relief, but those with outdoor plans, and visitors to the
local area, should take necessary heat precautions. With the
slightly higher wind speeds, overnight lows will probably be a few
degrees higher than what we`ve seen as of late.

Heading into early & middle parts of next week, the mid-upper
ridging to our east will strengthen but lift northward toward the
Tennessee & Ohio Valleys. This will put the northwestern Gulf
Coast back into the easterlies and allow for some increased
moisture to move in and less hostile subsidence aloft...resulting
in the return of some iso-sct rain chances to the forecast. 47

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 604 AM CDT Thu Jun 25 2026

A brief period of MVFR ceilings or fog is possible early this
morning, mainly north and west of the Houston airports. Otherwise,
VFR conditions are anticipated through the TAF period. Southerly
winds may gust to near 20 kt at times late this morning through
this afternoon, and again during the daytime Friday.

&&

.MARINE...
Issued at 132 PM CDT Thu Jun 25 2026

With a tighter pressure gradient expected to develop, look for
a slight increase in southerly winds and seas Friday through the
weekend. Speeds may flirt with caution flag criteria at times.
Rain chances will be very low for the next several days. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  93  76  94  76 /   0   0   0  10
Houston (IAH)  93  77  93  77 /   0   0   0   0
Galveston (GLS)  88  82  89  83 /   0   0  10  10

&&

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

&&

$$

DISCUSSION...47
AVIATION...DL
MARINE...47

NWS HGX Office Area Forecast Discussion