This exercise follows the progression of a winter weather event across the Central Plains states beginning 1200 UTC on 7 March 1999. Each forecast question is accompanied by Eta model data and includes a forecast discussion by Phil Schumacher, NWS Sioux Falls, South Dakota. This exercise compliments the Webcast, Inverted Troughs and their Associated Precipitation Regimes, based on a presentation by Phil Schumacher at the MSC Winter Weather Course, December 2002, in Boulder Colorado.
1. Identify whether precipitation will be primarily ahead or behind an inverted by applying the conceptual model of inverted trough precipitation organization.
2. Use isentropic analysis to view the affect inverted troughs have on moisture transport and the implied lift associated with inverted troughs.
3. Use the conceptual model of inverted trough precipitation organization to determine the approximate beginning and ending time for significant precipitation associated with inverted troughs.
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