🟡 Moderate

Dense Fog Advisory

Pointe Coupee; West Feliciana; East Feliciana; St. Helena; Washington; Iberville; West Baton Rouge; East Baton Rouge; Assumption; St. James; St. John The Baptist; Upper Lafourche; St. Charles; Upper St. Bernard; Upper Terrebonne; Lower Terrebonne; Lower Lafourche; Coastal Jefferson; Lower Plaquemines; Lower St. Bernard; Northern Tangipahoa; Southeast St. Tammany; Western Orleans; Eastern Orleans; Northern St. Tammany; Southwestern St. Tammany; Central Tangipahoa; Lower Tangipahoa; Northern Livingston; Southern Livingston; Western Ascension; Eastern Ascension; Upper Jefferson; Lower Jefferson; Upper Plaquemines; Central Plaquemines; Wilkinson; Amite; Pike; Walthall; Pearl River; Northern Hancock; Northern Harrison; Northern Jackson; Southern Hancock; Southern Harrison; Southern Jackson

Dense Fog Advisory issued December 18 at 12:22AM CST until December 18 at 9:00AM CST by NWS New Orleans LA

Alert Description

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...Until 9 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

Safety Instructions

If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you.

Time Information

Effective

Dec 18, 2025, 6:22 AM

Expires

Dec 18, 2025, 2:30 PM

Issued

Dec 18, 2025, 6:22 AM

Alert Details

Severity

Moderate

Urgency

Expected

Certainty

Likely

Issued By

NWS New Orleans LA

National Weather Service