Marine Weather and Tide Forecast for Chalmette, LA

LONG TERM
(Tuesday through Saturday night)
Issued at 302 PM CDT Sun May 11 2025

This system finally gets kicked out Tuesday as a broad trough enters the country from the Pacific. Should have a couple to a few dry day days before next chance of rain. From a temp perspective, be ready for summer show up REAL QUICK. Upper ridge builds in behind the upper low with possibly a 593dm ridge centered in the Gulf of America. That'll put highs well into the lower 90s...a pretty substantial increase from where we are today. Increasing dewpoints will also bring about heat indicies approaching 100 degrees by Thursday.



AVIATION
(00Z TAFS)
Issued at 639 PM CDT Sun May 11 2025

Reduced CIGs again overnight tonight with mostly MVFR expected for some terminals. Like the last day or two this will improve shortly after sunrise on Monday. Otherwise, cannot rule out a stray shower or storm, however, timing and location are a bit uncertain...left out of forecast for now, but a short fused TEMPO may be needed for convection early this evening and again by Monday from mid morning onward. Outside of convection VFR conditions expected with up to moderate southerly winds. (Frye)

MARINE
Issued at 302 PM CDT Sun May 11 2025

Cutoff upper level low is still centered just northeast of the local area. A surface low is underneath that upper low over northern MS with frontal boundary now well into the eastern Gulf. Thus, westerly winds in most coastal waters to persist through mid week as the low shifts east and surface ridge center slides across the center of the Gulf. Once that high pressure reaches the eastern Gulf, should start to see more onshore flow to resume and persist. Wind speeds throughout the forecast period will vary but generally be around 10 to 15 knots with short term periods of 15 to 20 knots.



PRELIMINARY POINT TEMPS/POPS
MCB 58 75 59 85 / 20 30 0 10 BTR 58 77 61 87 / 20 10 0 0 ASD 59 76 61 86 / 10 20 0 10 MSY 61 77 65 87 / 20 20 0 0 GPT 62 76 63 83 / 30 40 0 10 PQL 61 78 60 83 / 30 50 10 10

LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.