FXUS64 KHGX 132333 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 633 PM CDT Mon Apr 13 2026 ...New AVIATION... .KEY MESSAGES... - Warm and humid conditions continue through the end of the week. - Rain chances increase next weekend as a cold front moves into the region. && .DISCUSSION... Issued at 219 PM CDT Mon Apr 13 2026 Early afternoon radar imagery shows isolated to scattered rain showers developing over portions of the Brazos Valley and the Piney Woods in association with a shortwave impulse embedded within southwesterly flow aloft along with daytime heating and sufficient instability. We will keep rain chances between 20-40 percent over these areas through the remainder of the afternoon and much lower around 10% near the coast. Isolated to scattered convection should diminish by early this evening. The southwesterly flow pattern aloft will persist across southeast Texas through the end of the week, while light to moderate onshore flow prevails at the surface. Warm and humid conditions will continue each day underneath partly to mostly cloudy skies. Rain chances will overall remain very low with little in the way of forcing expected through Friday, though isolated showers or thunderstorms could clip our far northern counties on Wednesday. An upper level trough is expected to move across the central Plains and the Upper Midwest on Saturday. An associated cold front may approach our forecast area by Saturday afternoon and evening along with an increased chance of showers and thunderstorms through Saturday night. A slight chance of rain showers may continue into the day Sunday behind the frontal passage. Northeasterly winds are expected to increase Saturday night into Sunday behind the cold front, especially over the offshore waters. Temperatures will trend slightly cooler Sunday afternoon. && .AVIATION... (00Z TAF Issuance) Issued at 628 PM CDT Mon Apr 13 2026 Lingering showers from this afternoon and early evening have fully dissipated with expectations to not see much more tonight thanks to building high pressure. Instead concerns will be more focused on the cloud cover and the expected CIGs for the overnight period as multiple CAMs suggest a return to MVFR CIGs by around midnight. These conditions are expected to hold for most of the TAF sites through the overnight and morning hours with most CAMS not seeing a return to VFR until around noon tomorrow. Otherwise, look for winds to once again pick up tomorrow afternoon with gusts upwards of 20 to 23 kts possible at the surface. && .MARINE... Issued at 219 PM CDT Mon Apr 13 2026 A light to moderate onshore flow will persist through midweek with speeds generally around 15 knots from the southeast expected through Wednesday. There may be a brief period where small craft will need to exercise caution offshore Tuesday night into Wednesday morning. Water levels may reach up to 2.5-3.0 feet above MLLW near high tide through much of this week. Wave run-up is possible while the rip current risk also remains elevated through the week. && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 68 82 67 84 / 0 0 0 10 Houston (IAH) 70 84 70 84 / 0 0 0 10 Galveston (GLS) 73 79 72 79 / 0 0 0 10 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...Lindsey AVIATION...Self MARINE...Lindsey