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Met Summer/Early Fall 16 Banter


dmillz25

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http://www.phillyvoice.com/nws-meteotsunami-struck-coast-jersey-shore/

 

 

UPDATE (6/23/16): The U.S. National Weather Service Pacific Tsunami Warning Center has walked back an initial graph analysis that led them to conclude a meteostunami occurred Tuesday afternoon off the coasts of New Jersey and Delaware.

In a correction posted Thursday afternoon on Facebook, the Warning Center clarified that Tuesday's event did not possess all of the same characteristics as a previous meteotsunami that occurred in the area in 2013. 

Here's their explanation: 

 

 


A meteotsunami, like all tsunamis, is a propagating wave train. While the sea-level anomaly shown in the figure did show up on other nearby tide gauges, it did not advance far beyond the mouth of Delaware Bay. In particular, it did not reflect from the shelf edge to come back to threaten the coast in the manner of the meteotsunami of June 2013. Since it did not propagate far, we cannot call the event a meteotsunami.

The waveform in the figure may simply be the result of wind piling up water down Delaware Bay. It clearly was a weather-induced long-wavelength phenomenon, but, unlike 2013, those waves were not the result of Proudman Resonance across the continental shelf (the atmospheric pressure record from Cape May shows a broad pressure pulse coincident with the waves rather than what was seen in 2013: a pressure pulse preceding the waves by more than an hour). The source area of this event appears to have been too small to sustain a tsunami; the waves rapidly dissipated.

 

Check out the real thing  from June 2013

 

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