Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
779 FXUS64 KHGX 242325 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 625 PM CDT Sun Aug 24 2025 ...New AVIATION... .KEY MESSAGES... Issued at 1106 AM CDT Sat Aug 23 2025 - Drier conditions expected through Monday, although isolated showers and thunderstorms are still possible near the coast. - High temperatures will rise into the mid 90s through Monday with isolated spots reaching the upper 90s. Heat indices will remain in the lower 100s. - Chance of showers and thunderstorms should rise again midweek as another weak boundary approaches from the north. && .DISCUSSION... Issued at 1114 AM CDT Sun Aug 24 2025 High pressure building over the Desert Southwest today will expand over Texas through the day tomorrow leading to continued drier conditions. There may be an isolated afternoon thunderstorms south of I-10 today and tomorrow as the sea breeze moves inland, but overall rain chances are minimal through tomorrow. The drier conditions will lead to a return of high temperatures in the mid 90 for most inland locations with isolated spots rising into the upper 90s. Another weak, diffuse boundary is expected to approach from the north on Tuesday creating a surge in PWATs across SE Texas. PWATs rise from around 1.3" on Monday to around 2" on Tuesday, and these higher PWATs combined with daytime heating will lead to an increase in shower and thunderstorm activity. These higher PWATs will remain through the remainder of the week giving us a daily chance of showers and thunderstorms. Some days may have higher coverage than others depending on if any weak disturbances embedded in the northwest flow aloft move through the region. Temperatures take a slight cool down Tuesday through the remainder of the week, but most areas will continue to see highs in the 90s. Afternoon heat indices will continue to be in the low 100s through the week. Fowler && .AVIATION... (00Z TAF Issuance) Issued at 623 PM CDT Sun Aug 24 2025 VFR at all sites and prevailing through the period. Light and variable winds overnight will become southeasterly during the day Monday. Light patchy fog possible just before sunrise at CXO. && .MARINE... Issued at 1114 AM CDT Sun Aug 24 2025 Light winds and low seas will continue with wind direction determined by the daily sea breeze, land breeze process through Monday before a more predominant onshore flow sets up for the remainder of the week. Isolated showers and thunderstorms will continue through Monday, but then there will be increasing chances Tuesday through the remainder of the week as another weak frontal boundary sags into parts of Southeast Texas. Fowler && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 74 96 73 95 / 10 10 0 20 Houston (IAH) 75 97 77 93 / 10 10 0 40 Galveston (GLS) 82 91 83 90 / 10 20 20 40 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...Fowler AVIATION...Adams MARINE...Fowler