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National Weather Service Forecast Discussion

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417
FXUS64 KHGX 280433
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1133 PM CDT Wed May 27 2026

...New DISCUSSION, MARINE...

.KEY MESSAGES...

- Patches/areas of Fog expected early this morning, possibly dense
  in some spots.

- Less active weather is anticipated through Saturday with warm wx
  and low rain chances.

- Increasing rain chances Sunday into next week.

&&

.DISCUSSION...
Issued at 1116 PM CDT Wed May 27 2026

Patches to areas of fog will be possible early in the morning,
especially in fog-prone areas that received heavier rains, with
model guidance showing visibility quickly deteriorating in the
pre-dawn hours leading up to sunrise. Dense pockets will be
possible during this early morning period as well. Early morning
lows will range from the 60s to lower 70s. The shortwave trough
currently overtop of SE Texas will be slowly filling to the east-
northeast throughout today. As a result, rain chances should be
decreasing, though some isolated/scattered lingering showers
cannot be ruled out, mostly east of I-45. Otherwise it`ll be a
very warm day with highs in the 80s, with a few spots potentially
hitting the 90 degree mark.

Onshore winds return overnight, bringing moisture return into the
early morning hours of Friday. Morning lows for Friday will be
slightly warmer as a result, mostly in the 70s with isolated upper
60s in a few spots. Amplified ridging will be in place over the
Plains/Mississippi River Valley during the day, with SE Texas placed
along the ridge`s southwestern peripheral. Rain chances will be
sparse, though some isolated showers could occur around peak
heating. Highs will be in the 80s to lower 90s.

Similar weather is anticipated for Saturday as mid/upper level
ridging remains over much of the Plains/Mississippi River Valley.
Continued onshore flow and moisture advection should result in early
morning lows in the 70s across the region. Some weak vorticity
impulses could undercut the ridge to bring some weak showers/storms
in the afternoon, though rain chances are still anticipated to be
low for Saturday. Highs should reach the 80s to lower 90s.

Rain chances increase into Sunday as several impulse undercut the
mid/upper level ridge. Decreasing subsidence should bring daily
chances for showers and storms through at least mid week. Highs are
forecasted to remain in the 80s/lower 90s with lows in the upper
60s/lower 70s.

03

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 652 PM CDT Wed May 27 2026

Any lingering showers and isolated MVFR ceilings should diminish
within the next hour or so. The main aviation concern will be
reduced visibility due to fog late tonight into early Thursday.
Terminals could experience visibility as low as 1SM in the 11Z -
14Z window range. Will continue to monitor trends and amend as
needed. Light and variable winds will transition to the E-ESE in
the afternoon at 5 - 7 knots. -SHRA/TSRA will be possible in the
afternoon, but did not mention them in the TAFs since better
chances should occur east of the terminals. Overall, VFR
conditions are expected through the period.

JM

&&

.MARINE...
Issued at 1116 PM CDT Wed May 27 2026

Light and variable winds are anticipated early today. Some lingering
showers/storms will be possible throughout Thursday, though coverage
is expected to be fairly isolated. Otherwise, light to moderate
onshore winds develop overnight into Friday with low seas of 1 to 3
feet anticipated through the weekend into early next week. Rain
chances increase Sunday into next week.

03

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  81  65  87  70 /  60   0   0   0
Houston (IAH)  82  67  88  72 /  90  10  10   0
Galveston (GLS)  84  69  86  77 /  90  20  10   0

&&

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

$$

DISCUSSION...03
AVIATION...JM
MARINE...03

NWS HGX Office Area Forecast Discussion