TAMPA, Fla — Commuters driving across the Howard Frankland Bridge Wednesday morning saw more than thunderstorms that developed. About 8:30 a.m. Wednesday, a waterspout quickly developed just south of the bridge in Tampa Bay.
No tornado warning was issued by the National Weather Service. The waterspout developed and dissipated in minutes.
The National Weather Service says radar estimates the waterspout lasted for about five minutes.
While the waterspout likely surprised all commuters who happened to look just south of the bridge, Wednesday's weather pattern is actually one that is more likely to produce morning waterspouts.
The current weather pattern is producing a west-to-east flow across the Tampa Bay region. This means that storms are more likely to develop during the morning along coastal areas, while they push inland during the afternoon.
At night, air over the water is warmer than over the land. So, air over the water continues to rise. This creates a land breeze as the cooler air over land moves in to replace the rising air over the water. This is called the land breeze.
During the morning, the sun starts to heat the land. Land heats up more quickly than water, so now the cooler air over the water starts to move in to replace the rising air over land. This is called the sea breeze.
As the sea breeze converges with the leftover land breeze, horizontal rotation can develop.
As showers and storms develop along these boundaries, the rising air can cause a rotating column of air. Occasionally this column can contract and a waterspout can form.
If a waterspout moves onshore, the National Weather Service issues a tornado warning as some of them can cause significant damages and injuries to people.
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