364 FXUS64 KHGX 052358 AFDHGXArea Forecast Discussion National Weather Service Houston/Galveston TX 658 PM CDT Sun Oct 5 2025
...New AVIATION...
.KEY MESSAGES... Issued at 1159 AM CDT Sun Oct 5 2025
- Isolated showers and storms will be possible along the coast and in the Gulf waters through the next several days.
- Small craft will need to exercise caution through this evening in the Gulf waters for easterly winds of 15-20kt and seas between 3-5ft.
- Beachgoers should also be aware that there is an increased risk for rip currents today. Increasing swells and winds may lead to minor coastal flooding at times of high tide this afternoon.
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.DISCUSSION... Issued at 1159 AM CDT Sun Oct 5 2025
We will be in a rather benign weather pattern for much of this week. A building upper level ridge will bring us a mostly rain- free week, but daytime heating and increased moisture will lead to some isolated afternoon showers (and maybe a thunderstorm or two) along the coast. Guidance has been showing that a weak, dry boundary may try to approach/move through the area mid to late week. Details are fuzzy on this boundary as guidance struggles to pinpoint on a timeframe (some runs have it coming through as early as Thursday, and other runs not until the weekend), but the most likely impacts we`d feel from this week FROPA is a brief period of dry northerly winds. Afternoon high temperatures through this week will generally be in the upper 80s to mid-90s with Tuesday and Wednesday likely the warmest days of the week. Overnight lows will be in the low to mid 70s through Wednesday, but could see some slightly cooler overnight lows once that weak boundary ushers in some drier air.
The high risk of strong rip currents continues today, and it may continue into tomorrow depending on how quickly the onshore winds weaken. High tide at Galveston Bay Entrance got to around 4.2ft above Mean Low Low Water early this morning. While the afternoon high tide cycle is expected to be lower today (up to around 3.4-3.7ft), there may be some lingering minor coastal flooding due to the elevated water levels and wave runup. Tide cycles tonight into Monday will be closer to normal. Here are a couple impacts we have seen during previous minor coastal flooding events with similar conditions: - When water levels reach 3.7ft above MLLW, water may begin to reach Highway 87 at Highway 124 on Bolivar Peninsula, and on Beach Drive near Blue Water Highway in Surfside.
Fowler
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.AVIATION... (00Z TAF Issuance) Issued at 654 PM CDT Sun Oct 5 2025
VFR conditions for much of the forecast period. E winds at 5-10 KTS through early tonight, then becoming light and VRB overnight into Mon morning. E-ESE winds strengthen to 5-10 KTS Mon afternoon. Iso -SHRA/TSRA is possible on Mon, although low chance, mainly over areas along and south of I-10.
Cotto
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.MARINE... Issued at 1159 AM CDT Sun Oct 5 2025
Small craft should continue to exercise caution through this evening as easterly flow of 15-20kt with occasionally higher gusts and seas of 4-6ft continue. The persistent onshore flow will lead to elevated water levels, up to around 3.4-3.7ft above MLLW this afternoon.
Light winds and low seas are expected to return tonight and persist through at least Wednesday. A weak boundary may slide through the coastal waters mid to late week which would bring a return of moderate northeasterly winds to the region. There is high uncertainty on when, or even if, this boundary would slide through the waters, but could be as early as Wednesday night.
Isolated showers and storms will be possible through the next several days.
Fowler
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.PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 68 91 70 93 / 0 10 10 20 Houston (IAH) 72 91 74 93 / 10 20 10 20 Galveston (GLS) 77 86 79 87 / 10 10 10 20
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.HGX WATCHES/WARNINGS/ADVISORIES... TX...Coastal Flood Advisory until 7 PM CDT this evening for TXZ436>439.
High Rip Current Risk until 1 AM CDT Monday for TXZ436>439.
GM...Small Craft Should Exercise Caution until 7 PM CDT this evening for GMZ350-355-370-375.
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DISCUSSION...Fowler AVIATION...Cotto MARINE...Fowler
NWS HGX Office Area Forecast Discussion