Marine Weather and Tide Forecast for Madisonville, LA

SHORT TERM
(This evening through Sunday night)
Issued at 1215 PM CDT Sat Mar 14 2026

A very shallow upper level trough is dominating the pattern, bringing partly cloudy skies and seasonable almost-early-spring temperatures. Winds are generally light and out of the south.
Tonight will be seasonable with overnight lows around 60, give or take.

Tomorrow sees the beginnings of changes in response to a strengthening upper level low dropping down off the Rockies and moving across the Plains. Ahead of the trough Sunday afternoon winds will increase slightly to the 10-15 mph range and shift to southwesterly and in the late afternoon to early evening expect widespread convective showers. By late evening, say 10pm-ish the front will be crossing our northwest borders. It will be in the form of a QLCS bringing winds from the midlevels to the surface and perhaps generating some bowing segments strong enough to induce some weak rotations, that is tornadoes. Overall, though, the front will be moving very quickly by 5am-ish Sunday morning.
The rapid movement could enhance the straightline winds, but may act to suppress tornado development just because it is moving so fast. When the front passes, it will leave behind rapidly clearing skies, northwest winds, and chilly temperatures with the overnight low, which actually happens around sunrise on Monday, around the upper 30s to low 40s.

LONG TERM
(Monday through Friday night)
Issued at 1215 PM CDT Sat Mar 14 2026

Monday during the day will be chilly and blustery with winds out of the northwest and the issuance of a Wind Advisory likely. The strength of the low pressure and front will bring us one more night of cold with freezing temperatures expected north of the I-10/12 corridor. This will be followed by a slow warming trend with chilly temps Tuesday and Tuesday night, reaching the low 70s by Wednesday and the low 80s by the weekend. Our next chance for rain is outside the foreseeable forecast period, well beyond seven days from now.

AVIATION
(00Z TAFS)
Issued at 638 PM CDT Sat Mar 14 2026

A largely VFR forecast is in place at all of the terminals through Sunday afternoon. There will be a scattered cloud deck ranging between 2500 and 5000 feet through the period, but this should have minimal impact on aviation operations. Stronger boundary layer winds will help to keep fog development at bay due to continued thermal mixing through the overnight hours. At MSY, there is a metion of convective impacts with IFR restrictions at the very end of the 30 hour TAF window from a line of storms that are projected to quickly move through the area late Sunday evening.

MARINE
Issued at 1215 PM CDT Sat Mar 14 2026

Generally benign marine conditions are expected through early Sunday with south winds around 10 knots. Sunday afternoon the area begins to feel the effects of an approaching cold front and winds swing through westerly. As the front passes, winds will quickly shift to the northwest and increase to 30 to 35 knots with higher gusts. These gale conditions will push seas over 12 feet in the open Gulf waters creating very hazardous boating conditions. The gale conditions will linger into Monday night before gradually easing on Tuesday as another high pressure system becomes more centered over the waters. As the high becomes centered over the waters on Wednesday, winds will turn more easterly and fall to 10 knots or less. Seas will also decrease back to 3 feet or less by Wednesday morning.

LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...Gale Watch from late Sunday night through Monday afternoon for GMZ532-536-538-550-552-555-557-570-572-575-577.

MS...None.
GM...Gale Watch from late Sunday night through Monday afternoon for GMZ536-538-550-552-555-557-570-572-575-577.