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Automatic Detection of Mesocyclonic Shear Test Results
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1984
[PDF-16.24 MB]
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Alternative Title:Next Generation Weather Radar
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Description:We report results of studies of an algorithm that detects mesocyclonic shear in storms. Large intense tornadoes are always spawned in regions of high shear. The algorithm uses decision thresholds to discriminate between mesocyclonic and other shears not associated with organized circulatory flow. We have observed that distant mesocyclonic features become elongated in the beam's azimuthal direction. Thus, asymmetry criterion that checks the radial and azimuthal extent of the mesocyclone are range dependent. Data from sixteen mesocyclones were subjected to the algorithm. For these data the probability of false alarm per storm cell is 10%, and the probability of detection is 90%.
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Rights Information:CC0 Public Domain
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Compliance:Library
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