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National Weather Service Forecast Discussion

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899
FXUS64 KHGX 082334
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
634 PM CDT Thu Oct 8 2026

...New AVIATION...

.KEY MESSAGES...

- With more sun, temperatures will run above seasonal averages,
  though humidity will be somewhat lower.

- Can`t completely rule out a brief shower or two over the next
  couple of days, but the best rain chances remain offshore.

- Hazardous marine conditions (winds/seas) are expected at times
  through early Saturday from a nearby tropical system.

&&

.DISCUSSION...
Issued at 1223 PM CDT Thu Oct 8 2026

Drier weather continues this afternoon with upper level troughing
deepening over Texas. At the same time, Hurricane Isaias will
continue to strengthen as it tracks northeast through the central
Gulf. It`s influence of low level/sfc flow is growing, keeping winds
at these levels largely northeasterly across the region. Satellite
imagery shows TPW values of around 1.4 inches near Matagorda bay,
and slightly under 1.0 inch over the Piney Woods. These values
should continue to lower as northeasterly flow funnels in drier air
from upstream. That, with capping around 800-750mb, should keep rain
chances near zero for inland areas this afternoon. Near the
coast/over the Gulf waters, a few isolated showers cannot be ruled
out at times. The tightening pressure gradient from Isaias should
also bring breezy conditions inland during the afternoon hours.
Hazardous marine conditions are still expected to develop across the
Texas Coastal waters at times, including elevated seas, increased
risk of rip currents and potential for minor coastal flooding
along Gulf-facing beaches.

On Friday, Isaias should be working its way through the north-
central Gulf, continuing north-northeastward throughout the day.
Influence from Isaias will rise, backing winds further to the
northeast for Friday. Rain chances won`t be completely out of the
question, as some pockets of moisture/vorticity impulses push in
from the east, though by in large most areas are expected to remain
dry. On Saturday, winds will back to the north as Isaias makes
landfall. Winds across the region should decline as Isaias moves
further inland and weakens. Onshore winds are still slated to return
by Sunday, ushering in WAA & moisture return into next week as
ridging builds overtop SE Texas.

03

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 633 PM CDT Thu Oct 8 2026

VFR conditions persist throughout the TAF cycle. NE winds continue
between 5-10 kts inland with slightly elevated winds along the
coast. Overnight winds relax to light and VRB. For Friday,
anticipate similar conditions to today, with 5-10 kt NE winds, VFR
conditions, and any showers confined off the coast. As observed
today, expect gustier conditions Friday afternoon along and south of
I-10 between 15-20 kts, before again becoming light and VRB
overnight.

BSM

&&

.MARINE...
Issued at 1223 PM CDT Thu Oct 8 2026

Increasingly hazardous winds, seas and swells are still expected
this afternoon into Friday as Hurricane Isaias strengthens and
approaches the central Gulf coast. Small Craft Advisories remain in
effect through 1 AM Saturday, with the potential for winds of 15-25
knots and seas of 6-9 feet. Elevated water levels during times of
high tide (above 3.5 ft MLLW) and increased risk of rip currents are
also anticipated due to this tropical system. Winds and seas
decrease Saturday, subsiding to 10-15 knots and 2-4 feet by
Sunday. Showers and storms will be possible almost daily with
higher rain chances expected next week.

03

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  66  93  64  92 /   0   0   0   0
Houston (IAH)  69  92  68  91 /   0  10   0   0
Galveston (GLS)  75  86  76  85 /   0  10  10   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...High Rip Current Risk through late Friday night for TXZ436>439.

GM...Small Craft Advisory until 1 AM CDT Saturday for GMZ350-355-370-
     375.

&&

$$

DISCUSSION...03
AVIATION...BSM
MARINE...03

NWS HGX Office Area Forecast Discussion