Marine Weather and Tide Forecast for Katy, TX

LONG TERM
(Sunday through next Thursday)
Issued at 1152 PM CDT Thu Apr 17 2025

A well stacked low pressure system is expected push northeastward from Oklahoma to Missouri on Easter Sunday. The low's trailing front will slowly push southeastward across SE TX on Sunday into Monday. The environment is expected to be highly sheared during the first half of Sunday. Afterward, shear gradually subsides as the low pushes north and takes much of its hear with it. However, small disturbances in the flow aloft, coupled with LL convergence from the front and ample moisture and instability should allow the development of at least scattered showers and isolated thunderstorms. But we cannot rule out the presence of deeper convection and a few stronger / heavier thunderstorms on Sunday.
The front becomes increasingly diffused on Monday but could still provide enough forcing to spark scattered shower and thunderstorm activity on Monday.

Beyond Monday, the flow pattern becomes more zonal with a continuous train of upper level disturbances. Therefore, the chance of showers and thunderstorms remains elevated through the duration of the long term. Regarding temperatures, expect generally warm and humid conditions with highs in the 80s and lows in the mid 60s to low 70s.

Self

AVIATION
(06Z TAF Issuance)
Issued at 1121 PM CDT Thu Apr 17 2025

Widespread MVFR conditions are expected through mid-morning. A few terminals may see SCT MVFR ceilings at times; however, BKN ceilings look to prevail. Conditions will improve to VFR after late Friday morning, but it will only last through the afternoon.
MVFR conditions return early in the evening with ceilings dropping from south to north through the night. In terms of winds, a LLJ is moving overhead, resulting in gusty surface winds at times; especially across our northern terminals through the night.
Southerly gusty winds continue on Friday, with the higher gusts late in the morning and in the afternoon.

JM

MARINE
Issued at 1223 AM CDT Fri Apr 18 2025

Enhanced southeasterly fetch will continue into the weekend, bringing hazardous Gulf seas and periods of Small Craft Winds. The rip current risk is likely to be elevated as well. Water levels could approach 3 feet above MLLW during the high tide cycles this weekend. Therefore, minor coastal flooding could not be ruled out.
Current forecast water levels remain below coastal flood advisory levels. Winds are expected to weaken on Sunday and Monday. However, there will be an increasing chance of showers and thunderstorms during the Sunday to Monday time frame. Southeasterly winds may increase again by the middle of next week with a continuing chance of showers and thunderstorms.

PRELIMINARY POINT TEMPS/POPS
College Station (CLL) 90 70 86 68 / 0 0 20 20 Houston (IAH) 90 72 85 72 / 0 0 10 10 Galveston (GLS) 81 74 80 73 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES
TX...None.
GM...Small Craft Advisory until 10 AM CDT this morning for GMZ330-335.

Small Craft Advisory until 4 PM CDT this afternoon for GMZ350- 355-370-375.