The 23rd Conference on Hurricanes and Tropical Meteorology

4A.1
DIAGNOSTIC STRUCTURES OF TROPICAL STORM O6B BASED ON REMOTELY SENSED DATA

G V. Rao, Saint Louis University, St. Louis, MO; and J. R. Schneider, S. J. Klaus, and C. E. Graves

The year 1996 saw a record, near eight, tropical cyclones in the Bay
of Bengal; three over the average number of five. Some of these cyclones were seen by the DMSP SSM/I satellites (F10 and F13) and some by the Japan ADEOS satellite with a scatterometer. These satellites have enabled us to obtain the low-level winds, and precipitation amounts of the Bay of Bengal cyclones. One of these cyclones called 07B by the Joint Typhoon Warning Center, Guam, intensified by more than one T number per day form 4 November 1996 and came within 100 km of the south east coast of India when the winds speeds became 120 knots on the 6 November. Prior to landfalling, its intensity decreased; fortunately for the coastal town of Kakinada. Using the conventional upper air maps from the National Center for Medium Range Weather Forecasting (NCMRWF) in Delhi, India and the Renalysis Products from NCEP-NCAR, we are examining wind maxima, heavy precipitation and thus release of latent heating, eddy relative angular momentum flux convergence, vertical shear between the low-level south westerlies and upper-level easterlies, and the location of the monsoon trough. Currently available data suggests a SST maximum of 29.6C and a precipitation maximum of 11 mm/hr. The scatterometer wind data is available for another cyclone in the same location called 06B for 26 October. Subjective and Objective analysis of these data and derived pressure field will be presented.


The 23rd Conference on Hurricanes and Tropical Meteorology