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Annual and seasonal tornado trends in the contiguous United States and its regions
Author(s) -
Moore Todd W.
Publication year - 2017
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.5285
Subject(s) - tornado , climatology , geography , environmental science , meteorology , geology
The numbers of E(F)1+ tornadoes per year generally declined in all regions of the United States, except the Southeast, where they increased in frequency. The South Great Plains had the greatest median tornado frequency early in the study period whereas the Southeast had the greatest in the middle and late periods. The proportion of tornadoes occurring in the contiguous United States in summer are decreasing whereas the proportion occurring in fall are increasing. Annual tornado frequency in the (a) West, (b) North Great Plains, (c) South Great Plains, (d) Midwest, (e) Southeast, and (f) Northeast regions. The dashed line is the Theil–Sen slope estimate and the solid line is the local polynomial regression curve with a smoothing span of 0.66.