Marine Weather and Tide Forecast for Morgan City, LA

DISCUSSION
(Tonight through next Monday)
Issued at 1156 PM CDT Mon Aug 3 2026

A typical summertime pattern continues as we sit between two systems with an upper-level ridge to our west and an upper-level low to our east. At the surface, high pressure in the eastern Gulf will keep our winds from the south but with no surface low to increase our pressure gradient, winds will remain light. Because we are between two upper-level lows, our winds aloft are from the north, pushing dry continental air into our upper and mid levels.
This dry air is present in our 0Z sounding with a strong cap at 700 mb. While we have been getting some convection, it has been limited to the sea breeze and has been shallow. The mixing of the dry air aloft to the surface has helped keep our dew points in the low to mid 70s and has kept the afternoon heat index around 105, which is below the 108 needed for an advisory. Soundings over the previous 24 hours do show an increase in moisture aloft, which is in line with model expectations.

For the second half of the week, the upper-level lows will dissipate and ridging will begin to build over the region. Global models keep the main ridge axis to our north. Rain chances will remain between 40% and 60% with showers mainly being diurnally driven.

AVIATION
(12Z TAFS)
Issued at 554 AM CDT Tue Aug 4 2026

Areas of patchy ground fog within the moist airmass returning to the region which has found itself underneath a week upper level ridge. This ridge is expected to back west today, opening the door for a coverage of diurnal showers and thunderstorms. This coverage should begin near LCH and increase towards the east into Lower Acadiana where better moisture pools. Coastal Terminal TAFs reflect this expectation in rainfall. Outside of convection, expect light variable winds until afternoon when a southerly wind develops with the seabreeze. Conditions will improve with sundown.

11/Calhoun

MARINE
Issued at 1156 PM CDT Mon Aug 3 2026

Light south to southwest flow will continue for the rest of the week. Waves will stay below 3 feet. Rain chances will remain low for the next several days, around 10%.

FIRE WEATHER
Issued at 1156 PM CDT Mon Aug 3 2026

KBDI values continue to climb, sitting between 500 to 600 across the region. Minimum RH values will start to increase from 40% to 60% from Tuesday to Friday. Rain chances will increase during the second half of the week with isolated showers during the afternoon.

LCH WATCHES/WARNINGS/ADVISORIES
LA...None.
TX...None.
GM...None.