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Western U.S. Anomaly
Page - Monthly Top 10
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Western U.S. Anomaly
Page - Monthly Top 10
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| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
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Return to main Western U.S. Anomaly Display
|
Rank |
Date |
MTotal |
Description |
References |
| 1 | 11 January 1949 |
3.764 |
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| 2 | 07 January 1952 |
3.731 |
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| 3 | 01 January 1997 |
3.680 |
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| 4 | 12 January 1980 |
3.674 |
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| 5 | 23 January 1962 |
3.669 |
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| 6 | 07 January 2003 |
3.645 |
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| 7 | 13 January 1952 |
3.621 |
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| 8 | 11 January 1967 |
3.610 |
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| 9 | 04 January 2005 |
3.592 |
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| 10 | 03 January 1955 |
3.591 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 03 February 1998 |
3.294 |
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| 2 | 12 February 1978 |
3.265 |
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| 3 | 01 February 1963 |
3.179 |
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| 4 | 13 February 1960 |
3.152 |
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| 5 | 01 February 1990 |
2.976 |
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| 6 | 28 February 1991 |
2.947 |
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| 7 | 16 February 1998 |
2.947 |
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| 8 | 13 February 2001 |
2.933 |
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| 9 | 01 February 1989 |
2.898 |
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| 10 | 28 February 1978 |
2.897 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.071 |
Heavy rain in southern CA…10-12" in CA mountains…32" snow in 24 hrs in Bright Angel AZ | ||
| 2 | 4.037 |
Cut-off low; 1-2" in southern CA…locally up to 5" | ||
| 3 | 24 March 1957 |
3.940 |
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| 4 | 27 March 1992 |
3.853 |
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| 5 | 05 March 1987 |
3.776 |
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| 6 | 27 March 1977 |
3.710 |
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| 7 | 18 March 1994 |
3.667 |
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| 8 | 30 March 1987 |
3.594 |
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| 9 | 05 March 1983 |
3.589 |
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| 10 | 26 March 1991 |
3.573 |
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Rank |
Date |
MTotal |
Description |
References |
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| 1 |
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Cut-off low…1-2" rain in southern CA and AZ | |||
| 2 | 22 April 2005 |
3.962 |
West Coast trough | ||
| 3 | 3.953 |
Texas Upper low; record spring snow in Texas | |||
| 4 | 29 April 1953 |
3.812 |
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| 5 | 30 April 1951 |
3.800 |
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| 6 | 04 April 2006 |
3.769 |
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| 7 | 11 April 1982 |
3.760 |
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| 8 | 04 April 2007 |
3.752 |
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| 9 | 13 April 2006 |
3.701 |
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| 10 | 11 April 1952 |
3.651 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.153 |
Heavy rain and snow event from West Coast into MT | ||
| 2 | 21 May 2006 |
3.966 |
Pacific Northwest severe weather event | |
| 3 | 06 May 1969 |
3.884 |
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| 4 | 27 May 1973 |
3.718 |
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| 5 | 18 May 1956 |
3.684 |
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| 6 | 15 May 1995 |
3.683 |
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| 7 | 30 May 1988 |
3.650 |
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| 8 | 30 May 1983 |
3.603 |
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| 9 | 02 May 1998 |
3.581 |
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| 10 | 08 May 1977 |
3.571 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.235 |
Cut-off low…2-3" rain in AZ as it moved inland | ||
| 2 | 4.062 |
Record cold in the West; severe weather outbreak in MT | ||
| 3 | 3.970 |
Heavy rain from the Pacific NW to MT and ND | ||
| 4 | 16 June 1995 |
3.901 |
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| 5 | 09 June 1976 |
3.783 |
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| 6 | 02 June 1970 |
3.707 |
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| 7 | 06 June 1988 |
3.578 |
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| 8 | 11 June 1969 |
3.578 |
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| 9 | 19 June 1988 |
3.563 |
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| 10 | 18 June 1975 |
3.556 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.529 |
Record rain OR/ID/MT; Yellowstone F4 Tornado | Fujita 1989; Evans and Johns 1995 | |
| 2 | 24 July 1984 |
3.777 |
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| 3 | 04 July 1993 |
3.676 |
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| 4 | 16 July 1955 |
3.621 |
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| 5 | 10 July 1983 |
3.563 |
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| 6 | 04 July 1995 |
3.562 |
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| 7 | 22 July 1973 |
3.552 |
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| 8 | 13 July 1990 |
3.525 |
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| 9 | 26 July 2006 |
3.500 |
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| 10 | 28 July 1948 |
3.478 |
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Rank
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Date
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MTotal
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Description
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References
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| 1 |
3.956 |
West Coast trough; Big Thompson Canyon flash flood | Maddox et al. 1978; Carcena et al. 1979; Chang and Perkey 1995 | |
| 2 |
14 August 1979 |
3.789 |
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| 3 |
23 August 1992 |
3.770 |
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| 4 |
14 August 1968 |
3.735 |
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| 5 |
28 August 1951 |
3.727 |
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| 6 |
23 August 1960 |
3.722 |
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| 7 |
20 August 1964 |
3.718 |
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| 8 |
15 August 1976 |
3.667 |
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| 9 |
08 August 1991 |
3.643 |
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| 10 |
27 August 1984
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3.623
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Deep cut-off low off of the CA Coast |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.281 |
Significant flooding in Montana (10" rain in 18 hrs) | Lussky 1989; Braun and Monteverdi 1988; Braun 1991 | |
| 2 | 25 September 1997 |
3.969 |
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| 3 | 03 September 1950 |
3.919 |
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| 4 | 03 September 1961 |
3.806 |
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| 5 | 06 September 1978 |
3.793 |
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| 6 | 19 September 2004 |
3.772 |
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| 7 | 06 September 1973 |
3.742 |
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| 8 | 24 September 1982 |
3.733 |
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| 9 | 10 September 1976 |
3.731 |
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| 10 | 06 September 1970 |
3.716 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.108 |
Intense low - Columbus Day windstorm - northern CA to the Pacific NW | Lynott and Cramper 1966 | |
| 2 | 03 October 1967 |
3.840 |
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| 3 | 31 October 1967 |
3.805 |
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| 4 | 17 October 2005 |
3.796 |
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| 5 | 10 October 1985 |
3.768 |
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| 6 | 17 October 1971 |
3.749 |
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| 7 | 12 October 1997 |
3.744 |
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| 8 | 31 October 1961 |
3.712 |
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| 9 | 27 October 2004 |
3.696 |
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| 10 | 16 October 1984 |
3.695 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.288 |
Cut-off low…1-2" rain in southern CA and AZ | ||
| 2 | 4.113 |
Cut-off near Baja; 1-2" rain southern CA | ||
| 3 | 16 November 1964 |
3.906 |
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| 4 | 16 November 1965 |
3.856 |
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| 5 | 09 November 1955 |
3.6919 |
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| 6 | 02 November 1961 |
3.588 |
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| 7 | 22 November 1965 |
3.574 |
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| 8 | 30 November 1968 |
3.527 |
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| 9 | 22 November 1957 |
3.476 |
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| 10 | 09 November 1963 |
3.369 |
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Rank |
Date |
MTotal |
Description |
References |
| 1 | 4.076 |
Strong High Pressure Great Basin…Record Lows | ||
| 2 | 4.072 |
Massive winter storm in AZ…state 24 hour snowfall record | ||
| 3 | 4.010 |
Record rain and flooding across northern CA and Oregon; significant Pacific Northwest windstorm | Cole and Scanlon 1955 | |
| 4 | 09 December 1982 |
3.881 |
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| 5 | 24 December 1983 |
3.755 |
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| 6 | 06 December 1997 |
3.750 |
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| 7 | 13 December 1984 |
3.722 |
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| 8 | 18 December 1978 |
3.662 |
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| 9 | 09 December 1988 |
3.647 |
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| 10 | 25 December 1971 |
3.646 |