NOTES for June 14, 2000

Nov. 5, 2002

Case 1  
A/C investigates anvil debris from ~2126 to 2200 of a storm that
had produced lighting from ~1900 until 2029. Probably produced
150 to 200 flashes or more.
first lightning CAPPI w L 1859-1902
beginning of anvil CAPPI w L 1920-1923
more lightning CAPPI w L 2013-2016
last CG and LDAR CAPPI w L 2026-2029

By time of A/C arrival at ~2128 the E fields from both M and K
solutions had decreased to <1 kV/m (in MERGED file).
CAPPI 2130-2132
MER 2130-2140 
another pass
CAPPI 2140-2143
MER 2140-2150

Case 2  Decay of E in anvil
Upon first arrival at ~2212 the A/C made several passes in the anvil
and over reflectivity cells at lower altitude.
Surprizingly, E fields on some of these passes were only a few kV/m
even though radar tops extended to ~19 km and small cells of
reflectivities of ~45 dBZ existing at 5km and lower.
CAPPI w L 2225-2228
MER 2220-2230

At 2251 the A/C flew closer to the main cells which had been producing
lightning and found Emag ~20 kV/m.
CAPPI w L 2249-2251
MER 2250-2300

At 2306 the Citation made a pass very close to a core which had
Emag to 50 kV/m.
CAPPI w L 2304-2307
MER 2300-2310
LDAR sources were seen from this core as late as 2331-2333
and CGs 2326-2328.

The A/C continued to fly in and out of the anvil as the E field
decayed. By the time of the last pass at ~2358 to 2404 the E field
had decayed to ~1.5 kV/m from K matrix.
Problem with CAPPIs and MER plots passing midnight, but
next to last pass at 2347 to ~2358 shown below gives GEmags
of 3-4 kV/m slightly earlier.
CAPPI 2354-2357
MER 2350-2400