FXUS64 KHGX 250338 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 1038 PM CDT Fri Jul 24 2026 ...New DISCUSSION, MARINE... .KEY MESSAGES... - Scorching hot temperatures, especially Sunday throughout the upcoming work week with temperatures in the upper 90s/100s and heat indices of 104-112F. Heat Advisories Likely. - Patchy fog possible during the early to mid-morning hours for at least the next few days. && .DISCUSSION... Issued at 1038 PM CDT Fri Jul 24 2026 The hot topic over the next several days will be...well the hot temperatures. Things really heat up Sunday and beyond where Southeast Texas will feel like a sizzling plate of fajitas...minus the deliciousness. There will be some occasional rain chances along with patchy fog to talk about, but we're not gonna sweat the small stuff and focus mainly on the heat. A ~598 dam mid-level high (let's just coin this as a heatdome) was situated near the Four Corners earlier this afternoon. With Southeast Texas being on the eastern edge of it, we were still able to squeeze out a few showers due to lingering moisture. Going into Saturday, the heatdome will expand and strengthen to ~600 dam leading to an increase in subsidence (sinking air) and drier air (PW values decreasing near the 10th percentile: ~1.36"). As a result, rain chances will be slim to none, but the heat will be on the rise. Expect high temperatures mainly in the mid 90s with heat indices in the 100-105F range Saturday. Going into Sunday, PW values begin to increase a bit closer to the 25th percentile (~1.60"). The combination of that, an embedded shortwave underneath the ridge, sea breeze, and daytime heating "should" be feasible for a few showers to develop in the afternoon. Beyond that, PW values decrease again closer to the 10th percentile through at least midweek. This coincides with 850mb temperatures increasing to above the 90th percentile and occasionally near the 99th percentile. That means that triple digits are on the horizon for the next work week...and we're talking about just the air temperatures. When we factor in the humidity, it'll feel like it's well into the 100s and likely over our threshold for Heat Advisories (heat indices greater than 108F) as early as Sunday. Not expecting much relief during the overnight hours either with low temperatures only bottoming out in the upper 70s to low 80s. While we're on the sad news train, this is a good time to mention that patchy fog will be possible essentially every morning in the pre- dawn hours. Any time we have a stretch of hot temperatures like this, my first thought is how long is it going to last. Whelp, we are moving towards August which climatologically is our hottest month of the year. Most long-range model guidance holds us steady in the 100s, but there is a non-zero chance for at least part of the area to see some relief. Some long-range deterministic models depict a backdoor frontal boundary approaching from the northeast late next week as the mid-level high retreats westward. This hypothetically should increase rain chances, but there is a lot of uncertainty that far out. As always, we'll continue to monitor trends. With heat indices expected to be near or above Heat Advisory criteria as early as Sunday, please keep heat safety at the top of your minds for any plans that you make (especially if outdoors). Know the signs of heat-related illnesses, stay hydrated (with water), take frequent breaks from the heat, wear loose/light-colored clothing and sunscreen, and ALWAYS ALWAYS ALWAYS LOOK before you LOCK your vehicle. Don't forget about your pets as well! If the ground is too hot for the palm of your hand, then it is too hot for their paws. Batiste && .AVIATION... (00Z TAF Issuance) Issued at 642 PM CDT Fri Jul 24 2026 Isolated showers are possible near terminals through early this evening; otherwise, a dry pattern is anticipated with light to moderate south to southeast winds. Patchy fog will be possible at some inland terminals by sunrise. Low confidence exist for MVFR cigs at KCLL and KUTS late tonight through early Saturday morning. However, confidence in occurrence is low. Otherwise, VFR conditions are expected through most of the TAF cycle. JM && .MARINE... Issued at 1038 PM CDT Fri Jul 24 2026 A period of benign marine conditions continues with light to occasionally moderate southerly/southwesterly winds and 2-4 ft seas prevailing well into next week. Batiste && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 76 95 75 96 / 0 0 0 0 Houston (IAH) 78 96 77 97 / 0 0 0 20 Galveston (GLS) 83 91 83 90 / 0 0 0 10 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...Batiste AVIATION...JM MARINE...Batiste