Between 1953 and 1982, 1864 CONUS tornadoes were coded in the official database with an F-scale rating of -9 (unknown). The table below explains how these tornado records were modified to provide an estimated F-scale rat

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Date: 2016-02-17 13:54:48		Between 1953 and 1982, 1864 CONUS tornadoes were coded in the official database with an F-scale rating of -9 (unknown). The table below explains how these tornado records were modified to provide an estimated F-scale rat Add to Reading List Source URL: www.spc.noaa.gov Download Document from Source Website File Size: 54,35 KB Share Document on Facebook