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National Weather Service Forecast Discussion

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551
FXUS64 KHGX 252327
AFDHGX

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

...New AVIATION...

.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...
(00Z TAF Issuance)
Issued at 627 PM CDT Thu Jun 25 2026

VFR conditions will generally remain prevalent through the period
except for a brief round of MVFR ceilings that may impact areas
west and northwest of the Houston metro area again overnight into
early Friday morning. Winds remain southerly through the period,
picking up to 10-15 knots with a few gusts around 20 knots again
late Friday morning into Friday afternoon.

&&

.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)  76  94  76  95 /   0   0  10   0
Houston (IAH)  77  93  77  94 /   0   0   0   0
Galveston (GLS)  82  89  83  89 /   0  10  10   0

&&

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

$$

DISCUSSION...47
AVIATION...CLL
MARINE...47

NWS HGX Office Area Forecast Discussion