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National Weather Service Forecast Discussion

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679
FXUS64 KHGX 230549
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1149 PM CST Mon Dec 22 2025

...New DISCUSSION, MARINE...

.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, especially
  tonight through Wednesday morning.

- Last cold front of the year anticipated some time Sunday/Monday.

&&

.DISCUSSION...
Issued at 1054 PM CST Mon Dec 22 2025

The main weather story this week continues to be the dense coastal fog
expected nightly through the start of the weekend. Patchy fog will
likely develop further inland each night as well, but the densest
of the fog will remain near the coast with lingering sea fog
possible during the afternoon hours.

Otherwise, fall-like weather will continue through this week with
high temperatures in the upper 70s to low 80s and overnight lows
in the 60s. This unseasonably warm weather (on average 15-20
degrees above normal) is thanks to southerly flow at the surface
and strong ridging aloft. Daily temperature records may continue
to break through Saturday. A cold front is expected to move
through the area Sunday into Monday ushering in a return to more
seasonal weather and a chance of rain with the FROPA.

Here is a summary of record high max and high min temperatures
this week:

City of Houston:
High Max  | High Min
12/23:81 (2020) | 68 (1931)
12/24:82 (1955) | 71 (1982)
12/25:83 (2015) | 73 (2015)
12/26:84 (2016) | 73 (2015)
12/27:83 (2016) | 68 (2021)

Houston-Hobby:
High Max  | High Min
12/23:83 (2015) | 69 (1931)
12/24:82 (2021) | 69 (1987)
12/25:84 (2021) | 75 (2015)
12/26:84 (2021) | 75 (2015)
12/27:82 (2016) | 70 (2016)

City of College Station:
High Max  | High Min
12/23:86 (1889) | 65 (2009)
12/24:83 (1955) | 68 (2016)
12/25:85 (1955) | 70 (2016)
12/26:82 (2021) | 73 (2015)
12/27:81 (2021) | 69 (2021)

City of Galveston:
High Max  | High Min
12/23:78 (2015) | 67 (1982)
12/24:78 (2021) | 69 (2021)
12/25:80 (2021) | 70 (2021)
12/26:79 (2021) | 71 (2021)
12/27:78 (2016) | 71 (2021)

Fowler

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 606 PM CST Mon Dec 22 2025

Dense sea fog remains ongoing at GLS leading to a consistent
period of LIFR conditions that will likely continue well into
Tuesday. Decreased ceilings and visibilities will expand northward
over the next few hours with widespread IFR/LIFR conditions
expected by 06Z. These degraded conditions will stick around
through 15Z-16Z before ceilings and visibilities begin to increase
again. Outside of GLS, visibilities will improve by 16Z with MVFR
ceilings lingering till 18Z-20Z then a return to VFR. Winds will
be generally southeasterly around 5-10 kt throughout the TAF
period. Another round of decreased ceilings and visibilities are
expected Tuesday evening through Wednesday morning as well.

Batiste

&&

.MARINE...
Issued at 1054 PM CST Mon Dec 22 2025

Unfortunately, there is no pattern change expected through the
remainder of this week, so dense fog is expected to continue to be
possible through Friday night/Saturday morning. Fog will be most
widespread during the evening to mid morning hours, but patchy fog
will continue to be possible even during the afternoon hours near
the Bay entrances/lower Bays. There is a chance that the fog
potential will decrease Friday/Saturday as the continued
unseasonably warm air could warm the ocean temperatures up enough
to limit the fog development - but, at this point having at least
patchy dense fog is the most likely scenario. Otherwise, low seas
and light onshore winds will prevail this week.

Guidance does indicate that a cold front is expected to move
through the coastal waters late Sunday into Monday, which would
end this sea fog event. However, the cold air over the warming
waters will likely result in strong offshore winds and elevated
seas developing behind the cold front`s passage.

Fowler

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  67  80  65  78 /   0   0   0   0
Houston (IAH)  67  78  65  78 /  10   0   0   0
Galveston (GLS)  64  70  64  70 /   0   0  10   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Dense Fog Advisory until 10 AM CST Tuesday for TXZ214-238-300-
     313-335>338-436>439.

GM...Dense Fog Advisory until noon CST Tuesday for GMZ330-335-350-355.

&&

$$

DISCUSSION...Fowler
AVIATION...Batiste
MARINE...Fowler

NWS HGX Office Area Forecast Discussion