Marine Weather and Tide Forecast for Kaplan, LA

DISCUSSION
(This evening through next Tuesday)
Issued at 226 PM CDT Wed May 13 2026

As of 1430 CDT, conditions remain quiet and calm with light northerly to variable winds as a surface high pressure remains in the area. Temperatures are mostly in the 80s with dewpoints in the 50s, yielding RH values in the 30 to 40% range. Tonight, dewpoints will once again match or be a few degrees below actual temperatures, allowing for another round of patchy ground fog tonight and into tomorrow morning.

At the surface, the high pressure responsible for slightly drier conditions will drift away as a weak, dry front sweeps through the area. These features will exit by late Thursday into Friday, with southerly flow returning thereafter. Aloft, flow will remain northwesterly until the ridge begins to flatten into Friday. This briefly transitions to near zonal flow, though it will be short lived as an upper ridge strengthens over the Gulf and extends into the Atlantic early next week. Concurrently, an upper trough will develop over the western CONUS before progressing eastward early to mid next week.

A gradual warming trend is underway, with highs rising into the mid 80s to lower 90s and lows increasing from the low 60s into the 70s by the end of the week. Increasing cloud cover may somewhat limit daytime warming, while overnight temperatures rise due to enhanced insulation. Dewpoints will also increase with the return of southerly flow. Little to no precipitation is expected through Saturday, followed by daily isolated to scattered chances beginning Sunday and carrying on into the middle of next week.

AVIATION
(00Z TAFS)
Issued at 607 PM CDT Wed May 13 2026

Light and variable winds and clear skies will prevail through the period. No issues expected.

MARINE
Issued at 226 PM CDT Wed May 13 2026

Current conditions are benign, with waves below 3 feet and winds from the north at around 5 knots. Winds will remain light and variable through today into tomorrow as high pressure settles in overhead. By the end of the week, the high pressure will shift to the east, and winds will be onshore at around 10 knots. Waves will remain below 3 feet through the end of the week. No showers or thunderstorms are expected during the week.

FIRE WEATHER
Issued at 226 PM CDT Wed May 13 2026

Drier air will filter into the region through Thursday as subsidence aloft builds. Afternoon minimum relative humidity values will range into the 40 - 60% range for the remainder of the work week. Breezes may be calm or light and variable at times. Southerly winds become established by Friday as high pressure shifts eastward, likely offering a slight increase in afternoon MinRH through the weekend.
Otherwise, a nearly rain free forecast shall prevail through Saturday.

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