THE EASTERN MISSOURI SLEET STORM OF 29-30 DECEMBER 1990: A DIAGNOSTIC ANALYSIS

• Main Authors: James T. Moore, Christopher C. Buonanno
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.4527; http://nwas.org/digest/papers/1994/Vol18-Issue4-Jun1994/Pg16-Moore.pdf

Those physical mechanisms responsible for an extended period of sleet over eastern Missouri during 29-30 December 1990 are investigated. The post-frontal precipitation pattern is shown to be the result of a direct thermal circulationforced by Jrontogenesis along an arctic front. This circulation was apparently jill'ther enhanced by vertical motions associated with the entrance region of an upper-level jet streak. 1000-850 mb and 850-500 mb "partial " thicknesses are shown to be usejid in predicting sleet as opposed to freezing rain or snow. A Canadian technique using these partial thicknesses is described and applied to this unusual event. 1.