The. Marsh burns smoke and fog to reduce visibility in southern Ms.

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By journalsofus.com


BILOXI, Miss. (WLOX) – Skies over southern Mississippi turned hazy Sunday night after smoke from marsh fires burning near Lafitte and New Orleans East moved toward the coast over parts of the Hancock, Harrison and Jackson counties.

Smoke entering Gulfport October 22, 2023
Smoke entering Gulfport October 22, 2023(WLOX)
Smoke entering Biloxi October 22, 2023
Smoke entering Biloxi October 22, 2023(WLOX)
Smoke from marsh fires in southeastern Louisiana moved into southern Mississippi.
Smoke from marsh fires in southeastern Louisiana moved into southern Mississippi.(WLOX)
Dense Fog Warning until 10 a.m. October 23, 2023
Dense Fog Warning until 10 a.m. October 23, 2023(WLOX)

WLOX Tower Cams captured smoke moving toward the coast around 5:30 p.m. The smoke was able to advance from southeastern Louisiana thanks to light southwesterly winds. Making the smoke a little denser near the surface is a weather phenomenon known as a temperature inversion. This is when the colder air at the surface is trapped by a layer of warm air above. Since cold air sinks and warm air rises, smoke is trapped near the surface.

In addition to smoke, dense, patchy fog may form at night. Where fog can mix with smoke, it could create isolated areas of extremely dense fog, reducing visibility to less than a quarter mile. In some cases, the mixture of smoke and fog can reduce visibility to less than 10 feet in a phenomenon called super fog.

Normal temperature profile
Normal temperature profile(WLOX)
Hot air inversion
Hot air inversion(WLOX)

Winds are expected to remain light from the south and southwest overnight. Possibly calming after midnight, before changing from the north. This could also help keep the smoke around the coast throughout the morning.

While the smoke is not expected to cause major air quality problems, the U.S. Air Quality Index (AQI) places much of coastal Mississippi in a “moderate” air quality category. According to the AQI, “air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.”

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