Marine Weather Message
Issued by NWS New Orleans/Baton Rouge, LA
Issued by NWS New Orleans/Baton Rouge, LA
887 WHUS74 KLIX 212119 MWWLIX URGENT - MARINE WEATHER MESSAGE National Weather Service New Orleans LA 419 PM CDT Tue Jul 21 2026 GMZ531-533-541-551-570-221130- /O.UPG.KLIX.TR.A.1002.000000T0000Z-000000T0000Z/ /O.EXA.KLIX.TR.W.1002.000000T0000Z-000000T0000Z/ Lake Pontchartrain-Lake Salvador and Lake Cataouatche- Terrebonne Bay- Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm- Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM- 419 PM CDT Tue Jul 21 2026 ...TROPICAL STORM WARNING IN EFFECT... * WHAT...Southwest winds 25 to 35 kt with gusts up to 55 kt and seas 7 to 10 ft. * WHERE...Lake Pontchartrain, Lake Salvador and Lake Cataouatche, Terrebonne Bay, Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 to 60 Nautical Miles. * WHEN...Tropical Storm force winds possible from Wednesday afternoon until early Thursday morning. * IMPACTS...Tropical storm force winds and hazardous seas will capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ GMZ532-534>536-543-553-554-557-572-575-577-221130- /O.CON.KLIX.TR.W.1002.000000T0000Z-000000T0000Z/ Mississippi Sound-Lake Borgne-Breton Sound-Chandeleur Sound- Barataria Bay- Coastal Waters from Southwest Pass of the Mississippi River to Port Fourchon LA out 20 nm- Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm- Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM- Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM- Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm- Coastal waters from Pascagoula Mississippi to Stake Island Louisiana out 20 to 60 NM- 419 PM CDT Tue Jul 21 2026 ...TROPICAL STORM WARNING REMAINS IN EFFECT... * WHAT...Southwest winds 30 to 40 kt with gusts up to 55 kt and seas 8 to 13 ft. * WHERE...Portions of the Gulf including Lake Borgne, Breton Sound, Chandeleur Sound. * WHEN...Tropical Storm force winds possible until Wednesday afternoon. * IMPACTS...Tropical storm force winds and hazardous seas will capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ GMZ529-221130- /O.CON.KLIX.TR.A.1002.000000T0000Z-000000T0000Z/ Lake Maurepas- 419 PM CDT Tue Jul 21 2026 ...TROPICAL STORM WATCH REMAINS IN EFFECT... * WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt. * WHERE...Portions of the Gulf south and west of Port Fourchon including Terrebonne Bay. * WHEN...Tropical Storm force winds possible until Wednesday night. * IMPACTS...Tropical storm force winds and hazardous seas could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$