6.5 Observations of surface convergence and fluxes on 17–18 June 2002 during the International H2O Project

Wednesday, 22 June 2005: 11:30 AM
South Ballroom (Hilton DeSoto)
Aneela L. Qureshi, State Climate Office of North Carolina/North Carolina State Univ., Raleigh, NC; and S. Raman and D. Niyogi

The International H2O Project 2002 (IHOP_2002) was a field experiment that took place over the Southern Great Plains (Kansas, Oklahoma and northern Texas) during the summer of 2002. As is typical in this particular study area during this time period, convection occurred on several days throughout the field experiment. Several measurements are available to diagnose the convection cases. This study focuses on the surface and boundary layer analyses of a convection event that occurred on 17-18 June 2002, primarily over central Kansas. The region was under weak northwest flow during this time period, with surface dryline boundaries developing over the region and moving into Kansas. Deep moist convection developed along these boundaries on both 17 and 18 June, with low-level jet dynamics helping to support convection overnight on 17 June. Analyses of observed winds and fluxes during this time period were studied to locate areas of convergence that may have led to the convection and its evolution. Initial analysis suggests that convergence along dryline boundaries resulted in the development of convection. Results of these analyses involving several measurement systems will be presented.
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