Bay Area Storm Index (BASI)
ARCHIVE

Jan Null, CCM
Golden Gate Weather Services

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All Storms greater than 6.0 since 1950
    SF City
24-hour Rain
SFO Max
Sustained Wind
SFO Max
Wind Gust
Date BASI in. mph mph
11/18/1950 7.5 1.88 36 71
12/1/1951 8.5 1.59 43 85
12/3/1951 7.5 1.58 38 76
1/14/1952 8.5 1.71 41 83
12/22/1955 9.5 2.57 42 90
12/23/1955 9.0 2.18 41 83
1/12/1957 6.5 1.25 37 74
1/5/1959 6.5 1.44 35 69
9/18/1959 8.0 2.01 36 71
12/1/1960 8.5 1.68 44 87
10/12/1962 9.5 3.11 43 86
10/13/1962 9.5 3.56 41 83
1/30/1963 9.0 1.87 51 101
1/31/1963 7.0 1.26 39 78
1/20/1964 8.5 1.86 45 90
1/21/1967 8.5 2.45 39 78
11/13/1981 7.5 1.43 45 89
3/31/1982 9.5 2.57 40 81
12/22/1982 9.0 2.00 47 94
11/12/1984 7.5 1.68 35 69
2/8/1985 7.5 1.70 35 69
2/14/1986 8.5 1.83 48 97
2/15/1986 8.5 1.88 41 83
2/16/1986 7.5 1.74 37 74
2/17/1986 8.5 1.68 44 87
2/18/1986 8.5 1.87 44 87
2/13/1987 8.0 2.22 36 71
2/16/1990 8.0 1.40 55 110
1/13/1993 7.5 1.94 37 74
1/10/1995 6.5 1.33 35 69
3/22/1995 6.5 1.28 35 69
12/11/1995 9.5 3.61 43 85
12/12/1995 10.0 3.27 54 108
1/16/1996 6.5 1.27 35 69
1/1/1997 8.0 2.00 35 70
2/3/1998 8.0 3.00 30 60
2/14/2000 9.0 2.50 39 79
12/1/2001 7.5 2.00 32 65
12/2/2001 8.0 2.14 38 76
11/07/2002 7.5 1.47 40 96
12/16/2002 9.0 2.07 43 91
12/29/2003 7.5 2.15 33 61
1/1/2004 8.0 1.84 44 72
2/25/2004 8.0 2.01 38 73
12/1/2005 6.5 1.16 43 81
12/18/2005 8.5 2.99 36 71
12/31/2005 8.5 2.80 38 77
2/27/2006 7.5 1.29 55 97
1/04/2008 9.0 2.01 53 87
10/13/2009 8.5 2.48 41 77
12/28/2010 6.5 1.30 35 60
3/24/2011 7.0 1.56 33 61
12/2/2012 7.5 1.54 38 73
12/11/2014 7.5 3.40 29 71

* below 1500' elevation
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o Bay Area Storm Index

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