FXUS64 KHGX 181203 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 703 AM CDT Sat Jul 18 2026 ...New AVIATION... .KEY MESSAGES... - Hot weather is on tap this weekend and next week. - Highs in the mid 90s this weekend, and mid and upper 90s for some parts of the region next week. Heat index values in the triple digits. - Cannot rule out a very short lived shower or thunderstorm late in the day, but chances for the vast majority of the region should be less than 10% through at least midweek. && .DISCUSSION... Issued at 1208 AM CDT Sat Jul 18 2026 Building high pressure will dominate area wx this weekend and next week. Daytime highs will climb from the mid 90s this weekend into the 95-100F range for parts of the region next week. Column of dry air in place should allow dewpoints to mostly mix out in the afternoons thru Monday and keep heat index values mostly in check. PW's are forecast to climb back into the 1.5-2.0" range during the second half of the work week...along with potential strengthening mid level ridging sinking in from the north - so no promises then. That said, it's gonna be hot regardless. In terms of rain chances: most of us won't see any for the next week or so. One exception could be a short-lived, rouge storm or two between 4-8pm today near or just north of the metro area as some of the HREF members are suggesting. NHC is keeping tabs on some unsettled wx across the eastern Gulf. This is associated with a mid level trof stuck between stronger ridging to its east and west. It'll probably meander in that general region into early next week. There are a subset of various ensemble and AI guidance members that try to eventually show some gradual llvl/sfc organization. With a ridge fcst to further build into the region from the north, concern level for local impacts is fairly low...but it's that time of year to keep an eye on things and see how the pattern evolves with time. 47 && .AVIATION... (12Z TAF Issuance) Issued at 659 AM CDT Sat Jul 18 2026 CLL at IFR due to VSBYs, SGR at MVFR due to CIGs and CXO at MVFR due to VSBYs. Expect improvement to VFR by afternoon with winds light out of the south. Bailey && .MARINE... Issued at 1208 AM CDT Sat Jul 18 2026 Favorable marine conditions are anticipated into midweek. Southerly winds 10 to 15 knots and 2-3 foot seas will prevail today. As surface high pressure moves into the northwest Gulf Sunday and early next week we should see slightly lighter south-southwest winds and seas further subsiding. 47 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 94 75 96 73 / 0 0 0 0 Houston (IAH) 95 76 96 76 / 10 10 0 0 Galveston (GLS) 91 82 91 81 / 0 0 0 0 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...47 AVIATION...Bailey MARINE...47