Abstract: o:p>

Tornadoes are one of the most violent meteorological phenomena on

Earth. In an attempt to understand them, and with the aim of some day

being able to predict them better, Dr. Bluestein and his colleagues have

been transporting Doppler radars to locations close to storms in order

to obtain high-resolution analyses of the wind field associated with

them. While there are a number of different types of tornadoes, Dr.

Bluestein has concentrated his efforts on those that form in supercells,

long-lived convective storms having rotating updrafts. Supercells are

the most prolific producers of the strongest tornadoes. One objective of

his spring field programs has been to try to observe supercells while

tornadoes form. The other main objective has been to determine the wind

structure in tornadoes, which is of great interest to structural



In his talk at the Naval Academy, Dr. Bluestein will summarize briefly

what he and his colleagues have learned and show examples of data they

have collected using truck-mounted, dual-polarization, W and X-band (3

mm and 3 cm wavelength) Doppler radars from the University of

Massachusetts at Amherst. He also will note new techniques he will soon

be applying to tornado research, including a spaced-antenna technique,

phased-array rapid-scan radar, and infrared thermography.