Geoscience Reference
In-Depth Information
(A)
0.5
0.5
0.5
1
0.5
3
3
0.5
1
3
3
5
5
7
1
5
7
3
3
7
9
0.5
0.5
7
5
9
5
9
5
3
5
7
3
5
1
0.5
500
450
400
350
300
250
200
150
100
50
0
(B)
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
25
(C)
20
15
10
5
0
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Figure 9.32
Tornado characteristics in the United States. A: Frequency of tornadoes (per 26,000km
2
) in
the United States, 1953-1980. B: Monthly average number of tornadoes for each of the nine years shown
by the alternating black and white bars (1990-1998). C: Monthly averages of resulting deaths (1966-1995).
Sources: A: From NOAA (1982). B and C: After NOAA - Storm Prediction Center.
