FXUS64 KHGX 131827 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 127 PM CDT Wed May 13 2026 ...New DISCUSSION, MARINE... .KEY MESSAGES... - Dry and warm conditions will persist with highs in the upper 80s to low 90s into the weekend. Thursday is expected to be the hottest day of the week. - Patchy fog late tonight through early Thursday morning. - Persistent southeasterly flow will lead to a steady climb in humidity, potentially triggering spotty/isolated, diurnally- driven showers/storms throughout the weekend. Best rain and storm chances arrive early next week. && .DISCUSSION... Issued at 122 PM CDT Wed May 13 2026 Latest visible satellite imagery shows a generally tranquil day across TX, with only a few mid to high clouds. With the ridge building overhead, afternoon temperatures will be slightly warmer than yesterday. Light winds will prevail, though a stronger gusts from the southeast will be possible during the seabreeze late this afternoon. As the surface high shifts eastward, winds will become dominantly southeasterly, leading to a gradual increase in Gulf moisture. Therefore, cannot rule out patchy to areas of fog late tonight/early Thursday morning, particularly south of I-10. An even hotter day is anticipated on Thursday as the mid to upper- lvl ridge axis moves overhead. Highs in the low 90s are likely for most of southeast TX. Persistent southerly surface flow will transport more moisture inland. In fact, PWs will increase to the 1.1 to 1.4 inch range through the weekend. Consequently, warm (or hot) days will continue, accompanied by a gradual increase in humidity levels. The mid to upper lvl pattern begins to change Friday and into the weekend as the ridge breaks down, allowing for the passage of a few disturbances/shortwaves near the region. A tightening pressure gradient associated with lee cyclogenesis over west Tx/southern Rockies will lead to moderate southerly winds Friday into the weekend. This pattern will persist through the weekend, thus isolated diurnally-driven showers and storms cannot be ruled out, especially on Sunday. Beyond Monday, the pattern aloft remains unsettled with multiple disturbances riding along the flow. The next best rain and storm chances could potentially be early next week as a frontal boundary attempts to move through. JM && .AVIATION... (12Z TAF Issuance) Issued at 613 AM CDT Wed May 13 2026 Patchy fog currently affecting LBX/CXO and is expected to burn off by around 15Z. VFR conditions expected for the rest of the TAF period over SE TX. Winds will be generally light from the N-NE, becoming E-SE briefly in the later afternoon to early evening. Light VRB winds expected for Wed night. Localized patchy fog may once again develop over portions of SE TX Wed night into early Thu morning. Cotto && .MARINE... Issued at 122 PM CDT Wed May 13 2026 Light and variable winds and low seas will continue this afternoon and tonight. Surface high pressure will gradually shifts to our east tonight into Thursday, eventually bringing onshore winds across the Upper TX coast. Moderate onshore winds can be expected in the afternoon/early evening driven by the seabreeze, followed by offshore winds early in the morning from the landbreeze. A tighter pressure gradient across the Plains will result in elevated winds (15 to 20+ knots) and building seas after Friday. Rain chances remain minimal this week with the next best chance returning early next week. JM && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 87 66 90 68 / 0 0 0 0 Houston (IAH) 89 70 92 71 / 0 0 0 0 Galveston (GLS) 85 73 84 76 / 0 0 0 0 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...JM AVIATION...Cotto MARINE...JM