Area Forecast Discussion
Issued by NWS Houston/Galveston, TX
Issued by NWS Houston/Galveston, TX
654 FXUS64 KHGX 301139 AFDHGX Area Forecast Discussion National Weather Service Houston/Galveston TX 639 AM CDT Sun Aug 30 2026 ...New AVIATION... .KEY MESSAGES... - Temperatures will be running 2-5F above normal today and Monday, then a bit closer to seasonable norms after that. - NHC is monitoring an area of weak low pressure and disorganized precipitation over the north central Gulf. Though chances are not currently overly high for significant development, it`s that time of year to keep an eye on things at regular intervals. - Rain chances should increase Tue-Wed, followed by daily chances for isolated to scattered precipitation for the rest of the week. && .DISCUSSION... Issued at 1248 AM CDT Sun Aug 30 2026 GOES Total PW product shows 1.4-1.6" precipitable water values across the region (not too high for this time of year). With flat ridging across the Southern Plains expanding into the Tennessee Valley, lower end moisture availability and subsistence should keep rain chances more isolated in nature and mainly associated with the afternoon seabreeze/baybreeze through Monday. There is an area of troffiness situated between the ridges across the ncntl/ne Gulf Coast. NHC is monitoring a weak surface low pressure area off the coasts of AL/MS/LA. Both the mid/upper trof and potential sfc low should track wwd under the ridging described above and toward the western Gulf Tue-Wed. Though the general environmental conditions (and the lows fcst proximity to the coast) aren`t especially favorable for substantial tropical development, they`re not horrible either. Residents should monitor the latest forecasts for any changes...but right now we expect an uptick in moisture levels and much needed rain chances Tue-Wed as they move closer to the area. Mid-upper ridging pulls a bit further NNE later in the week. Lower heights and a prevalent onshore flow should allow for mostly seasonable wx and daily chances of diurnally driven precip. It appears that we might see another easterly wave track across the Gulf late in the week or next weekend...though timing/details are not yet quite on the same page in the longer range guidance. 47 && .AVIATION... (12Z TAF Issuance) Issued at 615 AM CDT Sun Aug 30 2026 Other than isolated patches of fog, expect mostly VFR conditions today. A prevailing light southeast wind is expected by afternoon, before becoming light and variable again overnight. An isolated afternoon shower or storm cannot be ruled out. && .MARINE... Issued at 1248 AM CDT Sun Aug 30 2026 Light winds and low seas will prevail for much of the week. There is an area of weak low pressure and disorganized precipitation across the northern Gulf coast that the National Hurricane Center is monitoring. Though chances of significant development are somewhat low, mariners should monitor the latest forecasts. Shower and thunderstorm development will probably increase across parts of the upper Texas coast Tuesday and Wednesday as some of this deeper moisture makes its way into the area. 47 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 100 75 98 76 / 0 10 10 0 Houston (IAH) 99 78 97 78 / 20 10 20 30 Galveston (GLS) 92 83 92 82 / 20 10 20 40 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ DISCUSSION...47 AVIATION...Self MARINE...47