T 2
T 2 :
Symbol for the Dvorak T-number, a subjective estimate of the strength of a tropical cyclone based on its appearance in satellite imagery. The T-numbers range from T1.0 to T8.0 in steps of 0.5; ratings above T2.5 indicate a tropical storm and ratings above T4.0 indicate a hurricane or typhoon. The scale was developed by the U.S. meteorologist Vernon Dvorak in 1974. Wikipedia has details
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