Geoscience Reference
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Figure 6.9. Examples of cyclonic-anticyclonic tornado pairs in cyclonically rotating, right-
moving supercells. (Top left) Smoothed streamlimes of the surface wind field relative to the
motion of the cyclonically rotating tornado, indicated by the upside-down triangle without a
label; the anticyclonic tornado is indicated by the upside-down triangle labeled ''T3''. For
tornadoes in central Iowa on June 13, 1976 (from Brown and Knupp, 1980); (top right) WSR-
57 radar reflectivity image of a cyclonic-anticyclonic tornado pair near Grand Island, NE, on
June 3, 1980 (from Fujita, 1981); (bottom) color-coded radar reflectivity factor (dBZ
e
) for a
cyclonic-anticyclonic tornado pair near Calumet, OK on May 29, 2004; from the U. Mass. X-
Pol mobile Doppler radar. Range rings shown in km.
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