Mesoscale Divergence, Vorticity, and Vertical Motion Compared to Radar and Rainfall Patterns.
TEXAS A AND M UNIV COLLEGE STATION DEPT OF OCEANOGRAPHY AND METEOROLOGY
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DA-1-T-014501-B-81-A1-T-014501-B-81-A-00ECOM0073-T-8-68Report on Project THEMIS Prediction of Environmental Parameters.weather forecasting, atmospheric motion, meteorological radar, radar reflections, thunderstorms, oklahoma, thesesthemis projectDivergence, relative vorticity, and vertical motion are computed from mesoscale surface and upper-air network data collected by the National Severe Storms Laboratory, Norman, Oklahoma. Results are compared to radar and rainfall patterns recorded simultaneously. The two cases chosen are cold frontal passages one has a strong squall line April 26, 1969, and the other has a line of scattered echoes May 16, 1969. Computed values of divergence, vorticity, and vertical motion are consistent with each other and, in general, with the radar and rainfall patterns. The largest difference is a large upward vertical motion computed for a region of dissipating echo. Author