Houston, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

246
FXUS64 KHGX 221122
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
522 AM CST Mon Dec 22 2025

...New AVIATION...

.KEY MESSAGES...

- Long stretch of unseasonably warm weather with temperatures
  10-20 degrees above normal. These temperatures will be near
  daily record high values, and a few records may fall throughout
  the week.

- Daily visibility reductions due to fog and sea fog, especially
  across the bays and coastal areas. The main threat for fog will
  be during the nighttime and early morning hours.

&&

.DISCUSSION...
Issued at 1035 PM CST Sun Dec 21 2025

The calendar is reading December, but the forecast is giving end
of October/early November. High pressure aloft and southerly flow
at the surface bringing warm, moist air into the region will
continue the unseasonably warm weather through the rest of this
week. High temperatures will be in the upper 70s to low 80s (about
15 degrees above normal) and overnight lows in the low t0 mid 60s
(about 20 degrees above normal). We will be within a few degrees
of record temperatures through at least Friday or Saturday.
Guidance does indicate a cold front bringing a return of seasonal
weather next weekend, but there is uncertainty on if the front
will make it through the region or stall to the north.

The most impactful weather this week will be the chance of dense
fog each night through at least midweek. The chance of widespread,
dense fog will be highest along the coast developing in the late
evening hours that persist through the mid-morning. There is a
chance for patchy fog to remain over parts of the coastal waters
through the afternoon hours, but more on that in the Marine
section below.

Fowler

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 511 AM CST Mon Dec 22 2025

Most sites currently under LIFR to IFR conditions due to low cloud
decks as well as areas of patchy to dense fog. These conditions
are expected to continue through around 14-15Z and will improve to
MVFR to VFR throughout the rest of the morning as fog burns off
and cigs gradually rise. Conditions may be slow to recover at GLS
and LBX due to the influence of sea fog continuing over the bays
and nearshore waters. There is a window where clouds scatter out
for several locations during the afternoon to early evening hours,
however, BKN/OVC decks will return and lower once again tonight
into Tue morning. Patchy to dense fog will also bring vis back
down for several locations, in particular for sites south of IAH.
S-SE winds will be 5-10 KTS today and 5 KTS or less tonight.

Cotto

&&

.MARINE...
Issued at 1035 PM CST Sun Dec 21 2025

A Dense Fog Advisory remains in effect through Monday morning with
areas of dense fog (visibilities less than 1nm) expected in the
Bays and nearshore waters. The fog will become patchier through
the afternoon, but pockets of dense fog will be possible all day
long in the nearshore waters/bays. If these areas remain
widespread enough, the Advisory may be extended through the
afternoon. This cycle will continue through at least midweek with
areas of dense fog redeveloping each evening that persist through
the morning, then patchy fog possible during the afternoon hours.
By Thursday, ocean temperatures should warm up enough to help
limit fog development, but patchy fog may continue to be possible.

Other than the fog, expect light southerly winds and low seas to
prevail through this week.

Fowler

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  78  65  80  63 /   0   0   0   0
Houston (IAH)  79  66  80  64 /  10   0   0   0
Galveston (GLS)  71  64  71  62 /  10   0   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Dense Fog Advisory until 10 AM CST this morning for TXZ200-214-
     236>238-300-313-335>338-436>439.

GM...Dense Fog Advisory until 10 AM CST this morning for GMZ330-335-
     350-355.

&&

$$

DISCUSSION...Fowler
AVIATION...Cotto
MARINE...Fowler