Initiation of an Elevated Mesoscale Convective System Associated with Heavy Rainfall
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Journal titleWeather and Forecasting
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AbstractA mesoscale convective system (MCS) developed during the morning hours of 6 June 1993 and moved across northern and central Missouri, resulting in a narrow swath of excessive rainfall (.150 mm). The MCS developed well north of a surface warm front above a cool, stable boundary layer and moved east-southeast across the state. Although some features of the synoptic environment agree with the frontal flash flood composite model, predicting the elevated thunderstorms that composed the MCS posed a unique forecasting challenge. This paper first describes the diagnostic parameters of the prestorm environment that would have been helpful to predict the initiation of the MCS and the resultant locally excessive precipitation. Attention is then drawn to the MCS itself via IR satellite and WSR-88D imagery. Finally, the similarities and differences of this episode to previous studies of flash flooding and elevated thunderstorms are noted, and a summary of key parameters useful in the anticipation of this type of convection and associated heavy rainfall are offered.
CitationRochette, S. M., and Moore, J.T., 1996, Initiation of an Elevated Mesoscale Convective System Associated with Heavy Rainfall, Wea. Forecasting , 11 (4), 443-457. Available on publisher's site at http://journals.ametsoc.org/loi/wefo http://journals.ametsoc.org/doi/abs/10.1175/1520-0434%281996%29011%3C0443%3AIOAEMC%3E2.0.CO%3B2
DescriptionCopyright 1996 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or firstname.lastname@example.org.