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🔵 Minor
Dense Fog Advisory
Lake Pontchartrain and Lake Maurepas; Mississippi Sound; Lake Borgne; Chandeleur Sound; Breton Sound; Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm; Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana 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 Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 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
Dense Fog Advisory issued December 18 at 12:26AM CST until December 18 at 9:00AM CST by NWS New Orleans LA
Alert Description
* WHAT...Dense fog will reduce visibility to 1 NM or less. * WHERE...All coastal waters. * WHEN...From midnight tonight to 9 AM CST Thursday. * IMPACTS...Areas of patchy dense fog will cause low visibilities, which could make driving conditions hazardous.
Safety Instructions
If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Time Information
Effective
Dec 18, 2025, 6:26 AM
Expires
Dec 18, 2025, 2:30 PM
Issued
Dec 18, 2025, 6:26 AM
Alert Details
Severity
Minor
Urgency
Expected
Certainty
Likely
Category
Met
Issued By
NWS New Orleans LA
National Weather Service