Tables


Table 1
Maximum sustained wind speed, minimum surface pressure, storm surge, and general damaging effects for the five Saffir-Simpson Hurricane Scale (Simpson, 1974) values
Saffir-Simpson
Category
Maximum Sustained
Wind Speed (m/s)
Minimum Surface
pressure (mb)
Storm Surge
(m)
Potential
Damaging Effects
1 33 to 42 >980 1.0 to 1.7 Minimal
2 43 to 49 979 to 965 1.8 to 2.6 Moderate
3 50 to 58 964 to 945 2.7 to 3.8 Extensive
4 59 to 69 944 to 920 3.9 to 5.6 Extreme
5 >69 < 920 >5.6 Catastrophic

"Intense" hurricanes are those of Saffir-Simpson Scale 3, 4, 5.
"Minor" hurricanes are Saffir_Simpson's 1 and 2.


Table 2
Western Sahel TOC rainfall index ranked by rainfall amounts in mean standard deviations from 1899 to 1990.
Rank Year NS Index
value
Rank Year NS Index
value
Rank Year NS Index
value
Rank Year NS Index
value
1 1906 (5) 1.69 24 1938 (4) 0.44 47 1949 (5) 0.05 70 1976 (5) -0.56
2 1954 (5) 1.46 25 1967 (5) 0.41 48 1957 (5) 0.04 71 1974 (5) -0.57
3 1918 (3) 1.27 26 1951 (5) 0.39 49 1965 (5) -0.04 72 1978 (5) -0.62
4 1927 (4) 1.24 27 1919 (3) 0.38 50 1916 (3) -0.05 73 1981 (5) -0.62
5 1936 (5) 1.14 28 1930 (4) 0.37 51 1920 (4) -0.05 74 1907 (5) -0.64
6 1943 (5) 1.14 29 1964 (5) 0.35 52 1925 (4) -0.05 75 1942 (5) -0.64
7 1935 (5) 1.10 30 1975 (5) 0.34 53 1926 (4) -0.05 76 1971 (5) -0.64
8 1989 (5) 1.00 31 1960 (5) 0.30 54 1963 (5) -0.08 77 1980 (5) -0.64
9 1950 (5) 0.97 32 1969 (5) 0.30 55 1928 (4) -0.09 78 1979 (5) -0.67
10 1915 (3) 0.97 33 1946 (4) 0.29 56 1912 (5) -0.10 79 1968 (5) -0.85
11 1958 (5) 0.91 34 1922 (5) 0.24 57 1937 (4) -0.11 80 1987 (5) -0.86
12 1917 (3) 0.85 35 1945 (5) 0.23 58 1988 (5) -0.11 81 1990 (5) -0.89
13 1909 (5) 0.82 36 1908 (5) 0.21 59 1934 (5) -0.14 82 1973 (5) -0.93
14 1924 (4) 0.77 37 1953 (5) 0.21 60 1966 (5) -0.16 83 1902 (5) -0.96
15 1952 (5) 0.74 38 1901 (4) 0.20 61 1956 (5) -0.18 84 1984 (5) -0.97
16 1905 (5) 0.72 39 1903 (4) 0.19 62 1985 (5) -0.20 85 1970 (5) -1.00
17 1933 (4) 0.58 40 1944 (5) 0.19 63 1914 (3) -0.22 86 1986 (5) -1.02
18 1955 (5) 0.56 41 1947 (5) 0.19 64 1900 (4) -0.23 87 1941 (5) -1.03
19 1948 (5) 0.55 42 1961 (5) 0.19 65 1904 (4) -0.25 88 1982 (5) -1.12
20 1921 (3) 0.54 43 1899 (3) 0.18 66 1910 (5) -0.29 89 1913 (4) -1.14
21 1940 (5) 0.51 44 1929 (4) 0.13 67 1939 (4) -0.29 90 1977 (5) -1.26
22 1923 (4) 0.47 45 1962 (5) 0.12 68 1911 (5) -0.40 91 1972 (5) -1.47
23 1932 (5) 0.47 46 1959 (5) 0.11 69 1931 (5) -0.53 92 1983 (5) -1.77

Number of stations (NS) available (out of a possible five per year) are also indicated in parentheses.


Table 3
The five stations used in the turn of the century (TOC) western Sahelian rainfall index: station name and country, June to September mean and standard deviation (in mm), years of data in analysis, and correlation coeffcients versus the TOC index.
Rainfall
Station Mean Std dev Years r vs index
Tombouctou, Mali 183.4 59.8 80 .67
Kayes, Mali 635.5 146.5 79 .70
Saint Louis, Senegal 321.3 159.1 91 .59
Dakar, Senegal 454.0 167.8 91 .79
Bathurst, Gambia 1025.7 269.5 84 .78


Table. 4
Quartile analysis of the 92 years of dependable data on both western Sahelian rainfall and U.S. landfalling hurricanes. Twenty-three years of data are present in each quartile.
Rainfall
quartile
Mean
annual
rainfall
Gulf
Coast
Upper Atlantic
Coast
Florida
peninsula
East
Coast
Entire
U.S. coast
U.S. intense hurricanes
Very wet +0.87 10 8 7 15 25
Wet +0.24 7 5 6 11 18
Dry -0.17 9 1 5 6 15
Very dry -0.93 7 0 0 0 7
Wettest vs driest half
frequencies
17\16 13\1 13\5 26\6 43\22
Exact two-sided P value 1.000 0.002 0.096 <0.001 0.013
Wettest vs driest half frequencies 10\7 8\0 7\0 15\0 25\7
Exact two-sided P value 0.629 0.008 0.016 <0.001 0.002
U.S. intense hurricanes
Very wet +0.87 14 5 6 11 25
Wet +0.24 10 10 7 17 27
Dry -0.17 15 8 7 15 30
Very dry -0.93 9 7 4 11 20
Wettest vs driest half
frequencies
24/24 15/15 13/11 28/26 52/50
Exact two-sided P value 1.000 1.000 0.839 0.892 0.921
Wettest vs driest half frequencies 14/9 5/7 6/4 11/11 25/20
Exact two-sided P value 0.405 0.774 0.754 1.000 0.551