Marine Weather and Tide Forecast for Metairie, LA

LONG TERM
(Sunday through Wednesday night)
Issued at 1033 PM CDT Wed Jul 9 2025

The upper level ridge will continue to build over the region on Sunday and is expected to remain in place through Wednesday. The increased subsidence aloft will keep precipitable water values close to the median for this time of year, or between 1.7 and 1.8 inches, and this will result in lower convective coverage each day. Shower and thunderstorm activity will be more scattered and short-lived due to the lack of any deep layer forcing mechanisms to support sustained updrafts. Unfortunately, the drier air aloft will also continue to entrain into the deepest updrafts, and the potential for wet microbursts will remain higher than average. The thunderstorms will be diurnally induced with convection peaking in the afternoon hours as the seabreeze/lakebreeze intensifies and serves as a focusing mechanism for convective development.
Temperatures will also be above normal with most locations climbing into the mid 90s each day. Although rain chances will be lower and dry air will be in place aloft, surface dewpoints will remain high in the mid to upper 70s through the period. As a result, oppressive heat will be a concern starting on Sunday and continuing through the end of next week. Heat index values are highly probable to exceed heat advisory criteria of 108 degrees each day. On average, maximum heat indices should range between 108 and 112 through the long term period.

AVIATION
(06Z TAFS)
Issued at 1250 AM CDT Thu Jul 10 2025

Overnight hours will generally be VFR. With precipitable water values near 2 inches, expect scattered to numerous SHRA and scattered TSRA. Activity could start as early as 15z or so, but should primarily be between 17z-23z. For much of that period, will use prevailing SHRA and PROB30 TSRA. Beyond 00z Friday, will go VFR for now through end of package Friday.

MARINE
Issued at 1033 PM CDT Wed Jul 9 2025

Outside of the threat of thunderstorms capable of producing waterspouts, gusty winds, higher waves, and lightning, conditions across the coastal waters will remain relatively benign. A broad ridge over the Gulf will keep winds from the south and southwest at 10 knots or less through the period and seas will remain 2 feet or less in the open Gulf waters. In the nearshore waters and lakes, the seabreeze cycle will lead to more variable wind directions with a light northerly flow of less than 10 knots in the early morning hours shifting to a stronger southerly flow of 10 to 15 knots in the late morning and afternoon hours each day.
Thunderstorms will tend to form along the landbreeze boundaries in the early morning hours and then linger into the late morning before shifting inland.

PRELIMINARY POINT TEMPS/POPS
MCB 90 71 91 72 / 70 20 80 40 BTR 90 75 92 74 / 70 20 80 40 ASD 91 74 92 74 / 70 20 80 50 MSY 92 77 92 78 / 60 20 80 40 GPT 91 75 91 76 / 60 40 80 50 PQL 92 74 91 74 / 50 40 80 50

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