Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
866 FXUS64 KHGX 110622 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 1222 AM CST Thu Dec 11 2025 ...New DISCUSSION, MARINE... .KEY MESSAGES... - Onshore winds return today, bringing another warm-up into Friday/this weekend. Lights showers possible. - Patches to Areas of sea fog possible across the coastal waters Friday through Saturday ahead of a cold front. - Cold front moves off the coast on Sunday with cooler weather into next week. && .DISCUSSION... Issued at 1203 AM CST Thu Dec 11 2025 Surface high pressure is slated to pass over SE Texas today, moving east of the area this afternoon. Winds will veer east to southeasterly, facilitating moisture return and WAA. Highs for today should reach the 60s/lower 70s with lows for Friday morning in the 40s/50s and lower 60s along the coast. Might see some patchy fog in a few spots tonight into early Friday morning. Southerly flow and WAA will keep the warming trend in place for Friday and portions of the weekend. Highs during this period will reach the 70s, though early morning lows will still lean on the cool side in the 50s/60s. A few light showers could develop during this period, mainly near the coast due to a combination of WAA, speed convergence and a passing midlevel shortwave. More notably, dewpoints will be above nearshore water temperatures (lower 60s at the GLS bay entrance based on RTOFS) during this time frame. We may see some periods of sea fog develop over the bays/nearshore waters, which may spill over onto land, especially during the overnight and early morning hours. Saturday night into the early morning hours of Sunday will be a particularly interesting time frame to watch with respect to sea fog due to pooling moisture and easing winds leading up to a cold front. Timing and the extend to which water temperatures remain crucial as to how conditions will play out. There is also the factor of showers too, which could introduce mixing and hamper fog development to some degree. Though, if we still have lower 60s water temperatures nearshore and the front doesn`t reach the coast till Sunday morning as currently forecasted, then it`s entirely possible to see areas of dense fog sea fog over the waters, gradually creeping inland leading up to the FROPA. Sunday should see cooler and drier weather in the wake of the cold front. Monday remains the coldest period in the forecast with temperatures early in the morning dropping into the upper 20s/mid 40s. During the daytime, highs for Monday should top out in the 50s/60s. High pressure moves off the east and once again we get onshore flow Monday afternoon with WAA and moisture advection in full swing again by Tuesday. Rain chances return for Tuesday and increase through mid next week. 03 && .AVIATION... (00Z TAF Issuance) Issued at 508 PM CST Wed Dec 10 2025 Not much change from last cycle - main feature is to complete the trend of veering winds from northerly this evening to southeasterly by tomorrow afternoon. At most sites this is represented by a VRB line, as change in winds is likely to happen at low speeds and be somewhat herky-jerky. It is more explicit at GLS where wind speeds stay up to make the change in winds more obvious. && .MARINE... Issued at 1203 AM CST Thu Dec 11 2025 Light offshore winds continue early today, but should shift onshore this afternoon with moisture and rain chances rising into Friday. Will have to keep an eye out for sea fog across the nearshore waters and bays beginning on Friday morning at the absolute earliest. Friday night into Saturday morning is the current time frame where sea fog conditions are most optimal, though water temperatures warming just a tad could inhibit sea fog development. If water temperatures are very slow to recover, the worst of the sea fog may extend through Saturday night into Sunday ahead of an approaching cold front. Small Craft Advisories are likely on Sunday behind the front. 03 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 67 49 74 54 / 0 0 0 0 Houston (IAH) 66 53 75 59 / 0 0 0 10 Galveston (GLS) 65 60 71 63 / 0 0 10 20 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...03 AVIATION...Luchs MARINE...03