Skip to main content.

National Weather Service Forecast Discussion

Related quick links> 5 Day Forecast, Local Advisories, Drought Monitor, UV Forecast, Air Quality Forecast 
908
FXUS64 KHGX 271725
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1225 PM CDT Tue Oct 27 2026

...New DISCUSSION, AVIATION, MARINE...

.KEY MESSAGES...

- Scattered showers possible again on Wednesday. Better chances
  generally west of I-45.

- Slightly drier air briefly moves in from the east on Thursday.

- Scattered rain chances return Friday through the weekend as
  moisture levels increase and some upper level disturbances pass
  through.

&&

.DISCUSSION...
Issued at 1225 PM CDT Tue Oct 27 2026

Though very light in terms of accumulations, precip coverage has
overperformed today. A similar type pattern will remain in place
on Wed with higher PW air situated across southern and western
parts of the region and some weak upper disturbances in the
vicinity. Precip should mostly wane later today and this evening.
Deterministic guidance and CAMs depict additional scattered
activity redeveloping near the Matagorda Bay area up to the Brazos
Valley Wed morning. Will add some lowish POPs back to around the
I-45 corridor out of respect for the wetter ECMWF and any
surprises other guidance might not be picking up on like today.

We should briefly see some recycled drier air filter into the
region from the east on Thursday so will lower/remove POPs then,
but start bringing them back into the forecast Friday and into the
weekend. This is when we should see the higher PW air return,
llvl ridging weakening a bit, and some shortwave activity embedded
in the swly flow aloft track newd out of Mexico and across Texas
into the Southern Plains. Things don`t look like a complete
washout, but there will likely be decent amount of scattered
activity around (esp Saturday). Assuming there`s not a stronger
vort/disturbance/forcing mechanism around, this looks mainly
diurnally driven. The evening trick-or-treating forecast looks ok
for most of the area at this point.

A more potent mid-upper trof digs swd into the scntl CONUS early
next week. We may need to eventually keep an eye out for the
potential for some strong storms in the vicinity late Monday or
early Tue depending on how the finer details evolve. As this
system passes, a cold frontal passage should quickly follow. 47

&&

.AVIATION...
(18Z TAF Issuance)
Issued at 1225 PM CDT Tue Oct 27 2026

Radar shows scattered showers mainly along and south of I-10. Some
showers may produce very isolated heavier downpours, which could
briefly reduce visibility. Shower activity looks to remain through
the afternoon, tapering off this evening. ESE winds prevail and
become light and variable overnight. Tomorrow morning, there is a
chance for MVFR/IFR CIGS for the western portion of the region. CIGs
lift back to VFR and winds pick up out of the ESE/SE late tomorrow
morning.

MLG

&&

.MARINE...
Issued at 1225 PM CDT Tue Oct 27 2026

A long easterly fetch situated across the northern Gulf will
maintain 3 to 4 foot seas for much of the week. Some isolated to
scattered showers and thunderstorms are possible at times as weak
disturbances pass through. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  63  83  64  84 /   0  30  10  10
Houston (IAH)  67  84  65  85 /  10  20   0   0
Galveston (GLS)  73  80  71  80 /  10  10   0   0

&&

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

&&

$$

DISCUSSION...47
AVIATION...MLG
MARINE...47

NWS HGX Office Area Forecast Discussion