FXUS64 KHGX 030447 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 1147 PM CDT Sun Aug 2 2026 ...New DISCUSSION, MARINE... .KEY MESSAGES... - Couldn't rule out patchy dense fog this morning. - Hot summer weather through the forecast period. - Isolated afternoon shower/storm possible first half of week. Somewhat better chance of an afternoon shower/storm later in the week. && .DISCUSSION... Issued at 1116 PM CDT Sun Aug 2 2026 A mid/upper ridge over SW CONUS is amplifying northeastward, with its axis extending into the northern U.S. plains and central Canada. A deep-layer trough remains in place over E CONUS, with very dry mid/upper air pushing southward between the trough and the ridge. Even at the surface, very low dew points have pushed into our region in the wake of relatively weak sfc cold front. The front has stalled near the coast, becoming increasingly diffused. We'll likely continue the dry LL regime on Monday, featuring low/mid 60s dew points north of I-10 and 70s dew points near the coast. However,the sea breeze boundary is expected to push further inland Monday afternoon, bringing higher dew points farther inland later in the day. Couldn't rule out an isolated afternoon shower or storm along the sea breeze boundary. We've actually dialed back on the hot temperatures a tad, making me glad we didn't totally buy into those 102-104 degree temperatures the NBM was suggesting a few days ago. But we are still calling for temperatures near 100 degrees inland, and low 90s at the coast. If the sea breeze is delayed, then we can get a little hotter. The mid/upper flow pattern is expected to become less amplified as the week progresses. The E CONUS trough should erode north, while the ridge to our west expands, increasing mid/upper pressure heights over Texas. Global ensemble mean 500 MB heights shows values increasing from roughly ~588dam to ~594dam between now and week's end. One's initial reaction to this trend would be the expectation of building heat. But as the E CONUS troughing fades away, our LL pattern will become more influenced by high pressure to the east, establishing deep onshore flow. This will have a tendency to increase the chance of late morning and afternoon cumulus, and could potentially increase the risk of a few isolated afternoon showers/storms. Therefore, afternoon high temperatures are actually forecast to decrease somewhat later this week (still quite hot in the mid 90s). However, persistent onshore flow will likely increase dew points as well. So expect an increasingly humid environment as the week progresses. Global ensembles keep PWAT anomalies below average, thus the PoPs remaining low all week. Self && .AVIATION... (00Z TAF Issuance) Issued at 608 PM CDT Sun Aug 2 2026 A stationary front continues to meander just south of I-10, causing light and VRB winds at several sites to start this TAF period. Winds are forecast to remain light and turn WSW early tomorrow morning before increasing and backing to S-SSE by tomorrow afternoon. There is a low chance for isolated showers and thunderstorms in the Houston metro area tomorrow afternoon, though confidence is too low to include in this TAF package. As for VIS, recent model guidance has hinted at a narrow swath of MVFR VIS south of I-10 around 12Z tomorrow morning. Given the increasing dewpoints and decreasing temps overnight, along with relatively light winds, a TEMPO group is included at KSGR and KLBX to account for patchy fog potential. MLG && .MARINE... Issued at 1116 PM CDT Sun Aug 2 2026 Light to moderate winds and low seas are expected through the forecast period. Winds on Monday are expected to be west to southwest, before becoming more southerly as we approach mid week. By the end of the week, winds are expected to become more southeasterly. Isolated shower or storm possible along the sea breeze boundary during the first half of the week. Somewhat better chance of a shower/storm in the afternoon for the bays, and in the morning hours in the Gulf later in the week. && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 97 72 100 75 / 0 0 10 0 Houston (IAH) 98 77 100 79 / 0 0 20 0 Galveston (GLS) 95 81 91 83 / 10 0 10 0 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...Self AVIATION...MLG MARINE...Self