Table of
  1. T
  2. NOAA NCEP CPC Indices NHTI Pacific - North American Pattern
Additional Information

TimePacific - North American Pattern
months since 1960-01-01
Jan 1950-3.65
Feb 1950-1.69
Mar 1950-0.06
Apr 1950-0.23
May 1950-0.4
Jun 1950-1.99
Jul 1950-0.82
Aug 19500.79
Sep 1950-1.0
Oct 19500.7
Nov 1950-1.74
Dec 1950-0.28
Jan 1951-1.18
Feb 1951-2.11
Mar 1951-1.09
Apr 19510.47
May 19511.19
Jun 1951-0.54
Jul 1951-0.44
Aug 19510.02
Sep 1951-0.08
Oct 19510.43
Nov 19510.21
Dec 1951-1.59
Jan 1952-3.19
Feb 19520.08
Mar 1952-0.69
Apr 19520.89
May 1952-0.79
Jun 19520.53
Jul 1952-1.57
Aug 19520.77
Sep 19520.4
Oct 19521.05
Nov 19520.77
Dec 19520.63
Jan 19530.18
Feb 19531.04
Mar 1953-0.44
Apr 19530.78
May 19531.14
Jun 1953-1.6
Jul 19530.27
Aug 1953-1.15
Sep 1953-0.14
Oct 19532.27
Nov 19531.57
Dec 19530.96
Jan 1954-2.11
Feb 1954-0.48
Mar 1954-1.44
Apr 1954-2.86
May 19540.65
Jun 19540.09
Jul 1954-0.14
Aug 1954-0.11
Sep 1954-0.04
Oct 19540.99
Nov 19541.38
Dec 1954-0.82
Jan 1955-0.14
Feb 1955-2.62
Mar 1955-2.47
Apr 1955-0.24
May 1955-0.42
Jun 19550.11
Jul 1955-1.32
Aug 1955-0.55
Sep 1955-0.22
Oct 19550.51
Nov 1955-0.93
Dec 1955-2.37
Jan 1956-2.34
Feb 1956-1.69
Mar 1956-0.97
Apr 1956-0.17
May 1956-0.17
Jun 1956-0.08
Jul 1956-1.28
Aug 1956-0.23
Sep 19560.42
Oct 1956-2.16
Nov 19561.0
Dec 1956-0.61
Jan 1957-2.18
Feb 1957-1.89
Mar 19570.78
Apr 1957-0.41
May 19571.24
Jun 19570.24
Jul 1957-0.11
Aug 1957-0.99
Sep 1957-0.22
Oct 19570.46
Nov 19570.49
Dec 1957-0.73
Jan 19580.62
Feb 19580.36
Mar 19580.18
Apr 19580.31
May 19580.66
Jun 19581.48
Jul 19580.74
Aug 19582.13
Sep 1958-0.05
Oct 19580.34
Nov 19580.08
Dec 19580.35
Jan 1959-1.54
Feb 1959-1.23
Mar 19590.21
Apr 1959-0.9
May 1959-0.3
Jun 19591.08
Jul 1959-0.45
Aug 19591.03
Sep 19591.19
Oct 19590.23
Nov 19590.26
Dec 19590.36
Jan 1960-0.16
Feb 1960-0.22
Mar 1960-0.69
Apr 1960-0.07
May 19600.99
Jun 19601.2
Jul 19601.11
Aug 19601.85
Sep 1960-0.01
Oct 19600.48
Nov 1960-0.52
Dec 19601.15
Jan 19611.16
Feb 19610.17
Mar 19610.28
Apr 1961-1.14
May 1961-0.25
Jun 19611.84
Jul 1961-0.52
Aug 19610.47
Sep 19611.1
Oct 1961-1.94
Nov 1961-0.4
Dec 1961-1.54
Jan 1962-0.74
Feb 1962-0.54
Mar 1962-0.71
Apr 1962-1.5
May 1962-1.11
Jun 1962-0.97
Jul 1962-0.36
Aug 19620.57
Sep 1962-0.83
Oct 19621.33
Nov 19620.53
Dec 1962-0.38
Jan 19630.09
Feb 19630.79
Mar 1963-2.04
Apr 1963-0.79
May 1963-0.95
Jun 19630.5
Jul 1963-1.1
Aug 1963-1.01
Sep 19630.87
Oct 19630.93
Nov 1963-0.31
Dec 19631.46
Jan 1964-0.44
Feb 19641.36
Mar 1964-1.31
Apr 1964-1.3
May 1964-2.27
Jun 19640.27
Jul 19640.2
Aug 19640.83
Sep 19640.92
Oct 19640.8
Nov 1964-0.78
Dec 1964-2.03
Jan 1965-0.92
Feb 1965-1.03
Mar 1965-0.8
Apr 1965-1.07
May 1965-0.42
Jun 19651.89
Jul 1965-1.26
Aug 19650.32
Sep 19650.36
Oct 19651.42
Nov 1965-0.81
Dec 1965-1.56
Jan 1966-0.15
Feb 1966-2.05
Mar 19660.43
Apr 1966-0.54
May 1966-0.15
Jun 19660.1
Jul 1966-1.18
Aug 19661.26
Sep 19660.63
Oct 1966-0.61
Nov 1966-1.96
Dec 1966-0.21
Jan 1967-1.16
Feb 1967-0.2
Mar 1967-2.25
Apr 1967-1.91
May 1967-0.8
Jun 1967-0.33
Jul 1967-1.24
Aug 1967-0.35
Sep 19670.11
Oct 19671.1
Nov 1967-0.35
Dec 1967-1.12
Jan 1968-1.78
Feb 19681.11
Mar 19680.13
Apr 1968-1.11
May 19680.23
Jun 1968-0.08
Jul 1968-0.04
Aug 19681.3
Sep 1968-0.87
Oct 19680.45
Nov 19680.83
Dec 1968-1.74
Jan 1969-2.96
Feb 1969-1.97
Mar 19690.47
Apr 19690.48
May 19691.02
Jun 19692.11
Jul 19690.51
Aug 1969-0.69
Sep 19691.31
Oct 19690.55
Nov 19690.13
Dec 19691.53
Jan 19700.12
Feb 19701.01
Mar 19700.49
Apr 1970-0.66
May 1970-0.5
Jun 19700.23
Jul 19700.74
Aug 1970-0.6
Sep 1970-0.39
Oct 1970-0.95
Nov 1970-1.15
Dec 1970-1.09
Jan 1971-2.43
Feb 1971-0.16
Mar 1971-0.28
Apr 19710.23
May 19711.09
Jun 19710.51
Jul 1971-1.74
Aug 1971-0.81
Sep 19710.15
Oct 1971-1.35
Nov 1971-0.26
Dec 1971-1.76
Jan 1972-2.46
Feb 1972-2.27
Mar 1972-0.1
Apr 1972-1.95
May 19720.21
Jun 1972-0.15
Jul 1972-1.13
Aug 1972-0.04
Sep 19720.13
Oct 1972-1.49
Nov 19720.53
Dec 1972-0.86
Jan 1973-0.88
Feb 1973-0.14
Mar 19730.53
Apr 19730.11
May 19730.67
Jun 19731.01
Jul 1973-0.26
Aug 1973-0.95
Sep 1973-0.27
Oct 1973-0.74
Nov 1973-1.66
Dec 19730.23
Jan 1974-1.54
Feb 1974-1.5
Mar 1974-1.1
Apr 1974-0.73
May 1974-0.4
Jun 1974-1.36
Jul 1974-0.09
Aug 19740.9
Sep 19740.35
Oct 19740.93
Nov 19740.53
Dec 19740.38
Jan 1975-1.2
Feb 1975-0.51
Mar 1975-0.81
Apr 1975-0.67
May 19750.6
Jun 1975-0.31
Jul 1975-1.53
Aug 1975-1.1
Sep 1975-0.23
Oct 1975-0.65
Nov 1975-0.63
Dec 1975-0.16
Jan 1976-0.25
Feb 1976-2.38
Mar 1976-1.78
Apr 19760.92
May 19760.58
Jun 1976-1.32
Jul 1976-0.12
Aug 1976-0.62
Sep 1976-0.04
Oct 19760.91
Nov 19761.72
Dec 19760.21
Jan 19771.6
Feb 19772.43
Mar 1977-0.69
Apr 1977-0.32
May 1977-0.56
Jun 19770.57
Jul 1977-1.04
Aug 19772.2
Sep 1977-0.72
Oct 19771.25
Nov 1977-0.22
Dec 1977-0.8
Jan 19780.13
Feb 19781.4
Mar 1978-0.18
Apr 1978-0.19
May 1978-0.73
Jun 1978-0.92
Jul 1978-2.43
Aug 19780.02
Sep 19781.38
Oct 19780.69
Nov 1978-0.48
Dec 1978-1.02
Jan 1979-1.54
Feb 1979-2.73
Mar 19790.08
Apr 1979-0.15
May 19791.27
Jun 1979-1.64
Jul 19790.51
Aug 19790.67
Sep 19791.02
Oct 19791.85
Nov 19790.51
Dec 1979-0.68
Jan 1980-1.01
Feb 19802.03
Mar 1980-0.64
Apr 19801.66
May 1980-0.16
Jun 1980-0.81
Jul 1980-0.81
Aug 1980-2.03
Sep 1980-0.08
Oct 19802.87
Nov 19801.28
Dec 1980-0.57
Jan 19812.46
Feb 19810.21
Mar 19811.27
Apr 1981-1.23
May 19811.83
Jun 1981-0.1
Jul 1981-1.02
Aug 1981-1.54
Sep 19810.08
Oct 1981-1.43
Nov 19811.19
Dec 1981-0.42
Jan 1982-1.75
Feb 1982-1.2
Mar 1982-1.66
Apr 1982-2.08
May 1982-0.53
Jun 19822.17
Jul 19820.49
Aug 19820.31
Sep 19820.83
Oct 1982-0.86
Nov 1982-0.47
Dec 19820.45
Jan 19830.87
Feb 19831.44
Mar 19832.03
Apr 19830.98
May 1983-0.08
Jun 19832.1
Jul 19830.82
Aug 19830.5
Sep 1983-1.37
Oct 19830.26
Nov 19831.75
Dec 1983-0.61
Jan 19840.6
Feb 19840.73
Mar 19841.08
Apr 19841.41
May 19840.37
Jun 1984-0.36
Jul 1984-2.61
Aug 1984-1.14
Sep 1984-0.02
Oct 1984-0.53
Nov 19840.39
Dec 1984-1.9
Jan 19851.44
Feb 1985-0.99
Mar 1985-1.19
Apr 1985-1.27
May 1985-0.82
Jun 19851.28
Jul 1985-0.19
Aug 1985-0.53
Sep 1985-0.63
Oct 1985-1.5
Nov 1985-1.83
Dec 19851.08
Jan 19860.6
Feb 19860.41
Mar 19860.51
Apr 1986-0.15
May 1986-0.03
Jun 19860.39
Jul 1986-0.35
Aug 1986-1.49
Sep 1986-0.28
Oct 19861.18
Nov 1986-0.71
Dec 19861.06
Jan 19870.63
Feb 19870.57
Mar 19870.85
Apr 19871.54
May 1987-1.02
Jun 19870.56
Jul 1987-0.43
Aug 19870.74
Sep 1987-2.6
Oct 19870.75
Nov 19871.19
Dec 19870.5
Jan 19880.03
Feb 19881.37
Mar 19880.38
Apr 19881.12
May 19880.61
Jun 19881.31
Jul 19881.6
Aug 1988-0.62
Sep 1988-0.97
Oct 19880.89
Nov 19880.11
Dec 19880.33
Jan 1989-1.57
Feb 1989-1.71
Mar 1989-1.56
Apr 1989-0.77
May 1989-0.04
Jun 1989-0.56
Jul 1989-0.59
Aug 1989-0.27
Sep 19890.41
Oct 1989-1.08
Nov 1989-0.7
Dec 19890.57
Jan 1990-1.09
Feb 1990-2.78
Mar 19900.04
Apr 1990-0.62
May 19900.27
Jun 1990-1.39
Jul 1990-0.26
Aug 19901.76
Sep 1990-0.46
Oct 1990-0.91
Nov 1990-1.66
Dec 1990-1.62
Jan 19910.2
Feb 19911.13
Mar 1991-1.21
Apr 19910.38
May 1991-0.63
Jun 1991-0.92
Jul 19910.28
Aug 1991-0.28
Sep 19911.15
Oct 1991-2.35
Nov 19910.22
Dec 19910.17
Jan 19920.99
Feb 19920.09
Mar 19920.46
Apr 1992-0.29
May 19921.2
Jun 19921.36
Jul 19920.38
Aug 1992-0.37
Sep 1992-1.13
Oct 19920.4
Nov 19920.8
Dec 1992-1.53
Jan 1993-1.48
Feb 19930.44
Mar 19930.94
Apr 19931.26
May 19932.43
Jun 19930.66
Jul 1993-0.28
Aug 1993-0.17
Sep 1993-0.97
Oct 1993-0.17
Nov 1993-0.35
Dec 19930.42
Jan 1994-0.8
Feb 1994-1.27
Mar 19940.23
Apr 1994-0.7
May 19940.48
Jun 1994-1.36
Jul 1994-0.06
Aug 1994-1.38
Sep 1994-2.02
Oct 1994-0.09
Nov 1994-1.61
Dec 19940.39
Jan 19950.2
Feb 19950.68
Mar 19950.03
Apr 19950.04
May 19950.09
Jun 19950.9
Jul 1995-0.74
Aug 1995-0.33
Sep 19951.22
Oct 19950.11
Nov 1995-0.73
Dec 19950.62
Jan 1996-0.68
Feb 1996-0.7
Mar 1996-0.75
Apr 19960.51
May 19960.37
Jun 1996-1.18
Jul 19960.18
Aug 1996-0.93
Sep 1996-0.27
Oct 1996-0.67
Nov 1996-0.44
Dec 1996-1.53
Jan 19970.16
Feb 19970.45
Mar 1997-1.56
Apr 19970.29
May 19970.77
Jun 1997-0.25
Jul 19970.1
Aug 1997-0.55
Sep 19970.22
Oct 1997-0.12
Nov 19970.86
Dec 19970.85
Jan 19980.3
Feb 19980.89
Mar 19980.69
Apr 19980.85
May 1998-1.87
Jun 19980.09
Jul 19981.67
Aug 1998-0.6
Sep 19980.42
Oct 19980.77
Nov 19980.7
Dec 1998-0.39
Jan 1999-0.44
Feb 1999-0.46
Mar 19990.38
Apr 19990.05
May 1999-0.05
Jun 19990.43
Jul 1999-0.92
Aug 19991.95
Sep 19990.33
Oct 19990.62
Nov 19990.45
Dec 1999-0.09
Jan 2000-1.7
Feb 20001.2
Mar 20000.95
Apr 2000-0.58
May 2000-0.16
Jun 2000-1.19
Jul 2000-2.55
Aug 2000-0.51
Sep 2000-1.21
Oct 20000.44
Nov 20000.7
Dec 20000.92
Jan 20011.29
Feb 2001-0.51
Mar 20010.39
Apr 2001-0.7
May 2001-0.01
Jun 2001-0.89
Jul 2001-0.36
Aug 2001-0.14
Sep 20010.04
Oct 2001-0.08
Nov 20011.03
Dec 20010.26
Jan 2002-0.7
Feb 2002-0.11
Mar 2002-1.56
Apr 2002-2.4
May 2002-0.56
Jun 20020.06
Jul 20020.4
Aug 20020.61
Sep 20020.6
Oct 2002-0.55
Nov 20021.46
Dec 20021.28
Jan 20031.01
Feb 20030.68
Mar 2003-0.36
Apr 2003-0.1
May 2003-1.85
Jun 2003-0.53
Jul 20030.73
Aug 2003-0.31
Sep 20030.59
Oct 20031.23
Nov 2003-1.65
Dec 20030.56
Jan 2004-0.12
Feb 20041.12
Mar 20040.0
Apr 20040.25
May 2004-1.46
Jun 2004-0.28
Jul 2004-0.33
Aug 20041.52
Sep 2004-0.11
Oct 2004-1.37
Nov 20040.29
Dec 2004-0.04
Jan 2005-0.62
Feb 2005-0.11
Mar 20050.56
Apr 20051.0
May 20051.62
Jun 20050.42
Jul 2005-0.02
Aug 20050.69
Sep 20051.32
Oct 20051.16
Nov 2005-0.74
Dec 20051.07
Jan 2006-0.1
Feb 2006-0.44
Mar 2006-0.56
Apr 20060.2
May 2006-1.03
Jun 2006-1.02
Jul 20061.29
Aug 2006-1.45
Sep 20060.31
Oct 2006-0.76
Nov 2006-1.34
Dec 20061.55
Jan 20070.27
Feb 2007-0.42
Mar 2007-0.12
Apr 20070.97
May 20070.03
Jun 2007-0.3
Jul 20071.65
Aug 20071.96
Sep 20071.52
Oct 20070.77
Nov 20070.65
Dec 2007-0.16
Jan 2008-1.06
Feb 20080.37
Mar 2008-0.61
Apr 2008-1.18
May 20081.25
Jun 2008-1.76
Jul 2008-0.51
Aug 20080.89
Sep 20080.89
Oct 20081.11
Nov 20081.05
Dec 2008-1.71
Jan 20090.13
Feb 2009-1.57
Mar 2009-1.29
Apr 2009-0.04
May 2009-0.43
Jun 20090.48
Jul 20090.72
Aug 20090.62
Sep 20091.03
Oct 20090.64
Nov 20090.19
Dec 20090.04
Jan 20100.96
Feb 20100.48
Mar 20101.68
Apr 20101.26
May 2010-0.73
Jun 2010-0.1
Jul 20100.89
Aug 20101.07
Sep 20101.07
Oct 20102.15
Nov 2010-0.81
Dec 2010-2.08
Jan 20111.0
Feb 2011-2.41
Mar 20110.38
Apr 2011-1.78
May 20110.25
Jun 20110.35
Jul 2011-0.75
Aug 20111.4
Sep 2011-0.39
Oct 20110.86
Nov 2011-0.76
Dec 20110.06
Jan 20120.13
Feb 20120.7
Mar 2012-0.19
Apr 2012-0.09
May 2012-0.29
Jun 2012-0.42
Jul 2012-0.57
Aug 2012-0.2
Sep 2012-0.39
Oct 2012-1.13
Nov 2012-1.06
Dec 2012-1.31
Jan 20130.05
Feb 20130.3
Mar 2013-0.26
Apr 2013-1.76
May 2013-0.24
Jun 2013-0.35
Jul 2013-0.71
Aug 2013-0.06
Sep 20130.41
Oct 2013-0.21
Nov 2013-1.14
Dec 2013-1.16
Jan 20140.59
Feb 2014-1.57
Mar 2014-0.5
Apr 20140.0
May 2014-0.59
Jun 2014-1.44
Jul 20140.5
Aug 20141.35
Sep 20140.78
Oct 20141.14
Nov 20140.64
Dec 20140.37
Jan 20150.14
Feb 20150.49
Mar 2015-0.52
Apr 2015-0.39
May 2015-0.05
Jun 2015-0.07
Jul 20150.29
Aug 20150.05
Sep 2015-0.8
Oct 20152.12
Nov 2015-0.2
Dec 20150.47
Jan 20161.94
Feb 20161.68
Mar 20160.41
Apr 20160.6
May 2016-0.85
Jun 2016-0.64
Jul 20160.53
Aug 2016-0.91
Sep 20160.11
Oct 20161.53
Nov 20161.44
Dec 2016-0.65
Jan 2017-0.29
Feb 2017-0.05
Mar 2017-0.03
Apr 20170.14
May 2017-0.19
Jun 20171.18
Jul 20171.33
Aug 20170.2
Sep 2017-0.32
Oct 2017-0.28
Nov 2017-1.98
Dec 20170.58
Jan 2018-0.14
Feb 2018-1.67
Mar 2018-1.16
Apr 2018-1.12
May 2018-1.09
Jun 20180.66
Jul 2018-0.76
Aug 20181.24
Sep 20181.16
Oct 20180.39
Nov 20180.22
Dec 20180.56
Jan 20190.42
Feb 2019-1.73
Mar 2019-0.05
Apr 2019-0.84
May 2019-0.17
Jun 20190.24
Jul 20190.62
Aug 20191.16
Sep 20191.62
Oct 2019-0.97
Nov 2019-0.07
Dec 2019-0.12
Jan 2020-0.95
Feb 2020-0.07
Mar 2020-2.41
Apr 2020-1.38
May 20200.27
Jun 20200.86
Jul 20201.2
Aug 20201.8
Sep 20200.59
Oct 2020-1.08
Nov 20200.21
Dec 20201.28
Jan 2021-0.41
Feb 2021-0.71
Mar 2021-1.24
Apr 2021-1.26
May 2021-1.1
Jun 20210.82
Jul 20210.11
Aug 20210.93
Sep 20210.33
Oct 20211.41
Nov 20210.68
Dec 2021-2.85
Jan 20220.65
Feb 20220.58
Mar 2022-0.16
Apr 2022-0.96
May 2022-0.64
Jun 2022-0.22
Jul 20221.96
Aug 20220.76
Sep 20220.13
Oct 20220.35
Nov 2022-0.71
Dec 2022-0.96
Jan 2023-0.37
Feb 2023-1.15
Mar 2023-1.89
Apr 2023-0.65
May 2023-0.67
Jun 20230.84
Jul 20230.65
Aug 20230.42
Sep 20230.84
Oct 20231.49
Nov 20230.51
Dec 20230.91
Jan 2024-0.08
Feb 2024-0.18
Mar 20240.15
Apr 2024-0.88