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David A. R. Kristovich, Luke Bard, Leslie Stoecker, and Bart Geerts

data that were available online. These were obtained from the University of Wyoming ( http://weather.uwyo.edu/ ) and the National Center for Atmospheric Research ( http://weather.rap.ucar.edu/ ). 3. Results The lake-effect event under investigation developed within an Arctic air mass that overspread the eastern Great Lakes region behind a cold front that crossed during the morning of 27 January 2014. Behind this cold front, a deep trough extended southward from a slow-moving cyclone centered in the

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Justin R. Minder, Theodore W. Letcher, Leah S. Campbell, Peter G. Veals, and W. James Steenburgh

. The event took place primarily on 11 December 2013. During the days surrounding IOP2b, a highly amplified synoptic flow pattern included persistent deep troughing over the Great Lakes region, leading to strong surges of cold arctic air over Lake Ontario. IOP2b took place during one of these surges that began around 0000 UTC 10 December. Heavy lake-effect snowfall commenced over the MRR transect at about 0000 UTC 11 December, following the passage of an upper-level short-wave trough, and continued

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