Marine fog advisory continued until 3 a.m.

HARLINGEN — Warm air crossing cooler gulf and bay waters has led forecasters to extend a dense marine fog advisory until 3 a.m. Thursday.

National Weather Service forecasters say webcams on South Padre Island along with satellite imagery are showing dense gulf fog is continuing out to 20 nautical miles.

The fog is expected to quickly redevelop this evening and last into the early morning hours of Thursday. Visibility will be reduced to under one mile.

The advisory is in effect in the Laguna Madre and the gulf from the Port of Brownsville to five nautical miles north of Port Mansfield.

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9:40 a.m.

HARLINGEN — Areas of dense fog on land will lift by mid-morning, but along coastal areas the mist will persist until noon, weather forecasters say.

Widespread areas of dense marine fog on the Laguna Madre and in the gulf out to 20 nautical miles will reduce visibility for mariners to a mile or less.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions, weather forecasters say.

Once the fog and cloud cover burn off, temperatures will be milder today with highs reaching 67 to 72 degrees in the Valley by 4 p.m.