Bay Area Storm Index (BASI)
ARCHIVE

Jan Null, CCM
Golden Gate Weather Services

ggwx.gif (12185 bytes)
All Storms greater than 6.0 since 1950

    SF City SFO Max Bay Area Max
24-hour Rain   Sustained Wind Wind Gust*
Date BASI in. pts mph pts mph pts
11/18/1950 8.2 1.88 3.3 36 2.6 71 2.3
12/1/1951 8.7 1.59 3.0 43 3.0 85 2.7
12/3/1951 8.2 1.58 3.0 38 2.8 76 2.4
1/14/1952 8.7 1.71 3.2 41 3.0 83 2.5
12/22/1955 9.8 2.57 4.0 42 3.0 90 2.8
12/23/1955 9.1 2.18 3.6 41 3.0 83 2.5
1/12/1957 6.8 1.25 1.8 37 2.7 74 2.3
1/5/1959 7.2 1.44 2.6 35 2.5 69 2.1
9/18/1959 8.4 2.01 3.5 36 2.6 71 2.3
12/1/1960 8.8 1.68 3.1 44 3.0 87 2.7
10/12/1962 9.7 3.11 4.0 43 3.0 86 2.7
10/13/1962 9.5 3.56 4.0 41 3.0 83 2.5
1/30/1963 9.3 1.87 3.3 51 3.0 101 3.0
1/31/1963 7.3 1.26 2.0 39 2.9 78 2.4
1/20/1964 9.1 1.86 3.3 45 3.0 90 2.8
1/21/1967 9.2 2.45 3.9 39 2.9 78 2.4
11/13/1981 8.3 1.43 2.6 45 3.0 89 2.7
3/31/1982 9.5 2.57 4.0 40 3.0 81 2.5
12/22/1982 9.3 2.00 3.5 47 3.0 94 2.8
11/12/1984 7.7 1.68 3.1 35 2.5 69 2.1
2/8/1985 7.8 1.70 3.2 35 2.5 69 2.1
2/14/1986 9.2 1.83 3.3 48 3.0 97 2.9
2/15/1986 8.8 1.88 3.3 41 3.0 83 2.5
2/16/1986 8.2 1.74 3.2 37 2.7 74 2.3
2/17/1986 8.8 1.68 3.1 44 3.0 87 2.7
2/18/1986 9.0 1.87 3.3 44 3.0 87 2.7
2/13/1987 8.6 2.22 3.7 36 2.6 71 2.3
2/16/1990 8.6 1.40 2.6 55 3.0 110 3.0
1/13/1993 8.4 1.94 3.4 37 2.7 74 2.3
1/10/1995 6.8 1.33 2.2 35 2.5 69 2.1
3/22/1995 6.6 1.28 2.0 35 2.5 69 2.1
12/11/1995 9.7 3.61 4.0 43 3.0 85 2.7
12/12/1995 10.0 3.27 4.0 54 3.0 108 3.0
1/16/1996 6.6 1.27 2.0 35 2.5 69 2.1
1/1/1997 8.3 2.00 3.5 35 2.5 70 2.3
2/3/1998 8.0 3.00 4.0 30 2.0 60 2.0
2/14/2000 9.3 2.50 4.0 39 2.9 79 2.4
12/1/2001 7.8 2.00 3.5 32 2.2 65 2.1
12/2/2001 8.8 2.14 3.6 38 2.8 76 2.4
11/7/2002 8.7 1.47 2.8 40 3.0 96 2.9
12/16/2002 9.3 2.07 3.5 43 3.0 91 2.8
12/29/2003 7.9 2.15 3.6 33 2.3 61 2.0
1/1/2004 8.6 1.84 3.3 44 3.0 72 2.3
2/25/2004 8.6 2.01 3.5 38 2.8 73 2.3
12/1/2005 7.1 1.16 1.6 43 3.0 81 2.5
12/18/2005 8.9 2.99 4.0 36 2.6 71 2.3
12/31/2005 9.2 2.80 4.0 38 2.8 77 2.4
2/27/2006 7.9 1.29 2.0 55 3.0 97 2.9
1/4/2008 9.2 2.01 3.5 53 3.0 87 2.7
10/13/2009 9.3 2.48 3.9 41 3.0 77 2.4
12/28/2010 6.7 1.30 2.2 35 2.5 60 2.0
3/24/2011 7.3 1.56 3.0 33 2.3 61 2.0
12/11/2014 8.2 3.40 4.0 29 1.9 71 2.3

* below 1500' elevation
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o Bay Area Storm Index

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