A fascinating event unfolded at Clearwater Beach, Florida, last Wednesday, as beach chairs were unexpectedly toppled by a rare 4-foot (1.2 meter) wave. However, this wave was not the result of an earthquake-triggered tsunami. Surfers from the West Coast would chuckle at its cause, as it was actually a meteotsunami, caused by storms with strong gusting winds.
A meteotsunami occurs when a line of storms moves over the ocean, bringing winds of 30- to 50-mph (48-80-kph) near the coast. These winds push the water, leading to increased wave height and eventually crashing onto shore. However, unlike traditional tsunamis, meteotsunamis last for only about an hour, subsiding once the leading edge of the storm reaches land.
The meteotsunami in Clearwater Beach was 2.5 feet (0.8 meters) higher than the forecasted wave height and about 4 feet (1.2 meters) higher than the average sea level. While this may seem significant, meteotsunamis of six feet (1.8 meters) or higher have been documented worldwide.
The National Weather Service does not issue specific advisories for meteotsunamis. Instead, if they forecast a storm that will have a substantial impact, they issue a coastal flood watch or warning.
The occurrence of meteotsunamis is more common during the winter months in Florida, particularly during stronger storms and squall lines. However, the current atmospheric pattern has been unusual, with westward winds prevailing throughout June. Typically, winds from the east are more common this time of year.
In conclusion, the meteotsunami that hit Clearwater Beach was a unique and intriguing event, showcasing the power of storms and gusting winds. However, it is important to differentiate it from tsunamis caused by seismic activity.
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“Was that actually a tsunami that hit Florida? Yes, but not the kind you think” (2023, June 27)
retrieved 27 June 2023
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