Smoke from two marsh fires west of New Orleans is drifting to the east northeast. As fog forms tonight, the mix of the smoke and fog can result in the formation of SuperFog. Areas that may be impacted include the southshore and approximately the southern half of Lake Pontchartrain from I-55 across the southern end of the Causeway to the Twin Span.
Dense Fog Advisories are in effect until 10 AM CST Friday for the tidal lakes, sounds and nearshore coastal waters, and much of south Mississippi and southeast Louisiana. Visibilities of one-quarter mile or less over land and less than one mile over marine areas will be possible. Expect rapid changes in visibilities over short distances, and plan for extra time during the morning commute.
Added to this is the smoke from two marsh fires west of New Orleans giving us the possibility for a SuperFog event .
- SuperFog is a very dense fog that can form when regular fog gets a boost from particles in the atmosphere like smoke from a marsh fire.
- SuperFog can be so dense that visibility is basically zero. You can hardly see your hand in front of your face...or definitely not the car in front of you.
- Superfog can reduce visibility almost instantly.
- Use extreme caution when driving.
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