textproduct: Houston/Galveston

KEY MESSAGES

- Patchy, but dense, fog will be possible across much of the area tonight into Sunday morning.

- Cold front moves through the area Sunday ushering in chillier weather to start the work week.

- Hazardous marine conditions with winds of 20-25 kt with gusts to 30-35 kt possible Sunday afternoon into Monday morning.

- Monitoring the potential for another cold front towards the end of the work week.

DISCUSSION

Issued at 1044 PM CST Sat Dec 6 2025

Moist onshore flow has led to the development of patchy, dense fog across much of the area. A Dense Fog Advisory is out through 7am for most areas along and south of I-10, and then along and east of I-45. As the night unfolds, the Brazos Valley may get included in the Advisory. Conditions will improve through the morning, but the Advisory may get extended along the coast into the mid-morning hours.

A dry cold front will push through the coastal waters late Sunday afternoon ushering in cooler, drier conditions. Ahead of the front, we will likely rise into the low to mid 70s across much of the area, but we will be cooling down Sunday night down into the upper 30s to mid 40s. And add in a breezy north wind, conditions will feel even chillier. This chilly weather will continue into the work week with highs in the mid 50s to low 60s on Monday and overnight lows into the mid 30s to low 40s Monday night (with some areas in the Piney Woods dropping to near freezing).

A gradual warm-up is expected through midweek as winds become southerly with highs in the mid to upper 60s on Tuesday, low to mid 70s on Wednesday, and then some low 80s possible returning by Thursday. Our next cold front may arrive late Thursday into Friday, but at this point it is also looking like a dry front like Sunday's.

Fowler

AVIATION

(00Z TAF Issuance) Issued at 455 PM CST Sat Dec 6 2025

Light VRB winds expected through Sun morning. Cigs are expected to lower to IFR-MVFR tonight for much of SE Texas, with some sites possibly lowering to LIFR at times. Areas of patchy to dense fog is expected to develop tonight into Sun morning and will lead to visibilities of less than 1 mile during the overnight and early morning hours for several locations, to include IAH/HOU. Conditions will gradually improve after 14Z with most of the fog burning off shortly after that hour. Cigs will also lift gradually around that hour and are expected to scatter out by the afternoon hours as drier air moves in after the passage of a dry cold front. NW winds at 10-15kt will develop Sun afternoon/evening in the wake of the front and gusts could reach 20-25kt at times. Brief moments of llvl wind shear is also possible.

Cotto

MARINE

Issued at 1044 PM CST Sat Dec 6 2025

Dense fog will continue to be possible through the morning hours in the Bays and nearshore waters with some patchy fog possibly lingering into the mid-morning or late morning hours. Light onshore winds will prevail through the early afternoon, but a cold front will usher in strong northerly winds (sustained 20-25 kt with gusts to 30-35 kt) starting in the late afternoon through Monday morning. These winds will cause rough bay waters and seas to climb to 4-6ft in the nearshore waters and to 5-9ft in the offshore waters. A Small Craft Advisory is in effect for all waters beginning at 4pm Sunday through Noon Monday. Light northeasterly winds are expected to develop Monday night with light onshore winds developing Tuesday that continue through midweek. These onshore winds will lead to an increase in moisture, so the return of fog is possible by midweek.

Fowler

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 53 68 38 58 / 10 10 0 0 Houston (IAH) 56 74 43 60 / 10 10 0 0 Galveston (GLS) 61 72 49 59 / 10 20 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...Dense Fog Advisory until 7 AM CST Sunday for TXZ163-164-177>179- 199-200-210>214-226-227-235>238-300-313-335>338-436>439.

GM...Dense Fog Advisory until 7 AM CST Sunday for GMZ330-335-350-355.

Small Craft Advisory from 4 PM Sunday to noon CST Monday for GMZ330-335-350-355-370-375.