000611 -- Case Summary 
Flight Times:  1758 - 2000

ANVIL CASE DAY

No attenuation of 74C radar for this case.

NOTE:  2D probe seems to be intermittent, probably due to bad power
supply

There were several separate cells that formed in the region studied,
some of which produced lightning and some did not. They were 
all moving at a uniform velocity towards the north-west.

Case 1 (Times: 1810 - 1826)
This anvil was just east of the 74C radar. There is no known
lightning activity in the cloud in the observable past. Cell is in
decay.

Case 2 (Times: 1828 - 1858)
A/C studied decaying anvil of storm from ~1830 to 1855, 
but never got into the main part of the anvil, only in the edge.
The storm had produced several lightning flashes sporadically from at
least 1600 until 1704.
The last CG lightning in the storm system that the aircraft flew through
at 18:45 occurred at 16:27 and the last (non)CG lightning occurred at
17:05. 

At the time the aircraft was there (about 1 1/2 hours after last
lightning) the E fields were <1 kV/m.

The Citation found no enhanced E fields 1 ½ to 2 hours after the last
lightning. The Citation flew close to decaying convective debris.

Case 3 (Times: 1901 - 1955)

At ~1905 the Citation proceeded to a storm to the SSE of KSC near Vero
Beach with anvil coming off to the north. Neither the LDAR nor the CGLSS
detected any lightning from this complex which covered an area >50 x 50
km square with a number of cells.

Convection was weak to moderate moving in from the SE. At 1829 the radar
shows this area is mostly convective with a bit of anvil blowing off to
the north at about (-80, 50). Max reflectivities at 1900 were about 40
dBZ with radar tops extended to 12 km. Regions of weak E fields with a
max of ~ 2 KV/m were observed along parts of the northern edge of this
complex from 1910 to 1945. No significant fields were observed.