Identification of Differences in Composite Vertical Profiles Between November Lake-Effect and System Snow Events in Northwest Indiana
Dr. Kevin Goebbert
Arts and Sciences
This research investigates the differences between vertical profiles of atmospheric variables for November system and lake-effect snow events that occurred in Northwest Indiana. Over 900 12-UTC soundings from 1957-2012 were collected using the Green Bay sounding station (KGRB; 72645) and categorized into system or lake-effect events. The data were interpolated to every millibar and composited by category to facilitate the discovery of potential differences between them. Properties examined include wind speed and direction throughout the troposphere, inversion height, moisture profile, lifting condensation level, as well as temperature. Overall, the two composite profiles demonstrate noticeable differences in the height of low-level temperature inversions, dewpoint depression profiles up to 300 hPa, and wind direction below 850 hPa. These differences illustrate the distinct atmospheric conditions favorable to Northwest Indiana lake-effect snow compared to system snow events.
Cade, Evan; DeRolf, Timothy; and Schletz, Samantha, "Identification of Differences in Composite Vertical Profiles Between November Lake-Effect and System Snow Events in Northwest Indiana" (2018). Symposium on Undergraduate Research and Creative Expression (SOURCE). 696.