WMOD00579

• Title: An Exploratory Forecast Experiment to Predict Supercooled Liquid Water in the Sierra Nevada
• Date: 11/1/1988
• Weather Modification - Doc Type: Report

Table 3. The 7 x 7 contingency Table of Counts
(percentage) and summary measures for veri-
fication of the durations of liquid water
(2 hour interval).

A. contingency Table, 1985-86 and 1986-87 combined.
Observed
p:::-edicted
None TO-2 T2-4 T4-6 T6-8 T8-10 TI0-12
,
I
None 118 7 3 1 1 1 1 1132
(40.8) (2.4) (1.0) ( .3) (.3) ( .3) ( .3) (45.7)
"-
'-
TO-2 2 ~', 1 0 0 0 0 0 3
( .7) ( .3) (0) (0) (0) (0) (0) (1.0)
'-,
T2-~ 9 1 ~" , 0 3 0 0 ~ .
" ... .1.LZ
(3.1) (.3) ( .3) {OJ (1.0) (0) (0) (4.8)
"
T4-6 5 1 3 " ,,1 0 0 2 12
(1.7) (1. 3) (1.0) ( .3) (0) (0) (.7) (4.2)
"
"
T6-8 1 3 3 4 2 1 2 16
( . 3 ) (1.0) (1.0) (1.4) ( .7) (.3) ( .7) (~ -\
:>.:Jj
"
,
T8-10 1 2 0 0 0 ' 0 2 5
( . 3 ) ( .7) (0) (0) (0) (0) (.7) (1 "'7\
. I j
"
"
TI0-12 1 3 7 4 1 10 81 107
, -'), (1. 0) (2.4) (1.4) ( .3) (3.5) (28.0); (37.0)
\..Jj

137

1 n
...0

( ,..., L \
':i._)

(6.2)

,...
_I
(- Q)
\:l.J

10
(3.5)

7
(2.4)

12
(4.2)

88 289
(30.4) (100)

B. Sun~ary Measu:::-es

1985-86 (n = 168)

1986-87 (121)

Combined (289)

TC::::; .76
CPOD .62

.49
.43

.64

.57

17