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