Publication - Journal Article Climatology of summer midtropospheric perturbations in the U.S. northern plains. Part I: influence on northwest flow severe weather outbreaks DOI https://doi.org/10.1007/s00382-009-0696-3 Journal Article Climate Dynamics, vol. 36, iss. 3-4, pp. 793-810, 2009 Authors Shih-Yu Wang, Tsing-Chang Chen, James Correia Language English