Figure 21a: Radar base reflectivity image from KICT
WSR-88D
(0.5 degree elevation) at 2234 UTC 11 April 2002 with important
features labeled. Yellow arrows depict
direction of low-level wind flow;
white ellipses indicate likely areas of
pre-existing vertical vorticity;
purple arrow points to location of new updraft developing at
intersection
of frontal boundary and outflow where a tornado was in progress.
The
tornado occurred approximately 285o/52 km (28 nm) from the
KICT
WSR-88D.
NWA Electronic Journal of
Operational Meteorology