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Cold front moving into Tampa Bay area should take care of fog

ST. PETERSBURG — Foggy conditions are expected to linger in coastal areas at least until this morning, weather officials said Wednesday.

Although most of the area saw its fog dissipate Wednesday, many places, including St. Petersburg and Tampa, still had places with low visibility after sunset.

That's because the coastal areas were experiencing sea fog, said Bay News 9 meteorologist Josh Linker.

Normal fog happens when temperatures dip to the dew point. Sea fog, on the other hand, forms when the dew point exceeds water temperatures.

It's likely that coastal areas had a mixture of regular and sea fog Wednesday morning, Linker said, and the sea fog stayed behind once the other fog moved on as temperatures rose.

"You're getting warm, moist air moving over the cold water, and it's forming the fog," said Logan Johnson, a meteorologist at the National Weather Service in Ruskin.

On Wednesday evening, visibility in coastal areas was about a half-mile, Johnson said.

A cold front, expected to be in the area by this morning, should take care of the sea fog problem.

The front will force a change in wind direction and also mix things up in the atmosphere, Johnson said. The trade-off, Linker said, is that the remainder of the week will probably be cooler, with highs in the upper 60s today and Friday.

There also could be some rain, Linker said, but it should move out by the middle of the day. A rapid warm-up will likely arrive by the weekend, he said, with temperatures back in the mid to upper 70s.

Cold front moving into Tampa Bay area should take care of fog 12/09/09 [Last modified: Wednesday, December 9, 2009 11:16pm]
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