Skip to main content.

National Weather Service Forecast Discussion

Related quick links> 5 Day Forecast, Local Advisories, Drought Monitor, UV Forecast, Air Quality Forecast 
329
FXUS64 KHGX 081117
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
617 AM CDT Wed Jul 8 2026

...New AVIATION...

.KEY MESSAGES...

- Seasonably hot conditions continue. Daytime highs will be in
  the 90s with heat indices in the triple digits.

- Scattered, diurnally driven thunderstorms are expected this
  afternoon and evening. Lower, but non-zero, rain chances
  Thursday.

- A deeper surge of Gulf moisture should arrive Thursday night and
  Friday. Warm, muggy conditions persist with daily chances of
  rain through the weekend into early next week.

&&

.DISCUSSION...
Issued at 1252 AM CDT Wed Jul 8 2026

Mid level trof axis will remain stretched across SE TX today and
Thursday. PW`s around 2" closer to the coast should allow for
some scattered seabreeze activity to develop as the day progresses.
Slightly lower moisture availability Thursday should keep things
a bit more isolated in nature. Daytime highs and heat indices will
be about the same as they have been the past couple of days.

Thursday night into Friday, an inverted mid level trof in the Gulf
will push wwd toward and into Mexico and south Tx. In the low
levels, a tighter pressure gradient will transport some deeper
tropical moisture into the region. PW values between 2.1-2.4" look
to hang around through the weekend into early next week setting
the stage for continued chances of mainly scattered, diurnally
driven activity. Overall coverage will vary on a day-to-day basis
with subtle fluctuations of moisture values, clouds, and heating.
47

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 611 AM CDT Wed Jul 8 2026

A fairly typical summertime TAF pattern is expected through this
cycle. Brief MVFR cigs/vis are possible over the next couple of
hours. Otherwise, VFR prevails through this cycle. Have maintained
the mention of VCSH through the morning for the sites closer to
the coast with PROB30s for TSRA across all terminals through the
afternoon hours as convection is expected along the sea-breeze.
Any storms that develops will likely lead to brief MVFR/IFR
cigs/vis and gusty winds. Convection should wane by 00Z or shortly
after. Winds will become light and variable once again overnight
into Thursday morning.

&&

.MARINE...
Issued at 1252 AM CDT Wed Jul 8 2026

A remnant, diffuse outflow boundary from Tuesday night`s storms
could provide somewhat of a focus for isolated storm development
early this morning in the Galveston Bay area. Otherwise, a more
typical summertime pattern will persist into Thursday with the
seabreeze the primary driver for iso-sct precip. Shower and storm
chances increase late Thursday night and into the weekend as
deeper moisture flows into the region. Best chances in the marine
environment should generally be in the late night through early
afternoon hours then transition inland. Onshore flow will prevail
through the period. Speeds in the 10-15kt range today should
slightly increase to closer to 15g20kt heading into Thursday and
Friday along with a corresponding bump in the seas into the 3-4ft
range. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  96  76  96  76 /  10  20   0  10
Houston (IAH)  97  78  96  79 /  30  20  20  10
Galveston (GLS)  90  83  91  82 /  20   0  20  20

&&

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

$$

DISCUSSION...47
AVIATION...Castillo
MARINE...47

NWS HGX Office Area Forecast Discussion