536
HALL
70
TT
TTT
TT
ToT
IT
70
60 om
= 60 &
%
x 50
— 50 o
;
O
5 40h
440 =
eR
> 30
bn
<2 L
-
lok
0
z
+30 2
—
4
b-4 pos
=
Lot |
10 20 30
—
+2 ZzZ
fa
<<
a
fj al
bo
yy fy yy
40 50 60 10 20
0100
TIME, CST
dio &
pp
30 40 50 60 10
0200
0
Fig. 6—Time cross sections of vadar-echo intensity (solid lines) and
radar storm tops (dashed lines) over station 1 for storm of Apr. 17,
1964,
maximum values, This occurred when the radar-echo intensity maximum was in its closest proximity to the station and was increasing in
area, When the radar storm top was a maximum of 25,000 ft over the
collector, the radar top of the echo-intensity center was 25,000 ft and
increased to a maximum of 36,000 ft. Since the tropopause height in
the vicinity was 41,200 ft, the entire storm cell was confined to the
troposphere,
The ratio of particulate to dissolved material (see Fig. 5) in-
creased from the first to the second sample. Table 1 shows that this
occurrence was due to differential decreases in the beta concentration
of both the particulate and the dissolved materials. Table 1 also shows
that an increase in the particulate and the dissolved beta concentra~
tion was quite marked during the period of very light rainfall, apparently because of evaporation of peripheral rainfall.
This storm was a strong, but small, cell that was confined to the
troposphere, The rainfall collections made were not from the region
of maximum intensity, but rather from a region about halfway between
the maximum and the boundary of the rain area. During the sampling
period the storm was in the mature stage. Later, after having moved
out of the network, it began to dissipate at around 0200 CST.
ANALYSIS OF STORM OF APRIL 23
A quasi-stationary front, extending westward from a low-pressure
center over Virginia, crossed southern Kansas as is illustrated in