textproduct: Houston/Galveston

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.