Table of
  1. T
  2. NOAA NCEP CPC Indices NHTI Tropical - Northern Hemisphere Pattern
Additional Information

TimeTropical - Northern Hemisphere Pattern
months since 1960-01-01
Jan 19500.55
Feb 1950-1.07
Dec 1950-0.94
Jan 1951-0.09
Feb 1951-1.3
Dec 19510.58
Jan 1952-0.21
Feb 19520.07
Dec 1952-1.89
Jan 1953-0.74
Feb 19531.04
Dec 19531.4
Jan 1954-0.3
Feb 1954-1.4
Dec 1954-1.18
Jan 19550.4
Feb 1955-0.09
Dec 1955-1.4
Jan 1956-3.26
Feb 19560.61
Dec 19560.88
Jan 19571.65
Feb 19570.18
Dec 1957-0.24
Jan 1958-1.82
Feb 1958-1.33
Dec 19580.51
Jan 19590.0
Feb 19591.21
Dec 1959-0.74
Jan 19600.23
Feb 1960-0.58
Dec 19601.15
Jan 1961-0.15
Feb 1961-0.74
Dec 1961-1.57
Jan 19621.24
Feb 19620.59
Dec 1962-0.2
Jan 19632.14
Feb 1963-0.01
Dec 19630.49
Jan 1964-0.31
Feb 19641.91
Dec 1964-0.41
Jan 19650.03
Feb 19650.65
Dec 1965-1.49
Jan 1966-0.31
Feb 1966-0.08
Dec 1966-1.18
Jan 1967-0.01
Feb 19671.27
Dec 1967-0.82
Jan 1968-0.94
Feb 1968-0.62
Dec 1968-1.1
Jan 1969-1.6
Feb 1969-2.14
Dec 1969-0.93
Jan 1970-0.26
Feb 19700.24
Dec 1970-0.37
Jan 19710.28
Feb 1971-0.22
Dec 19710.33
Jan 19721.34
Feb 1972-0.36
Dec 19721.79
Jan 1973-0.93
Feb 1973-0.56
Dec 1973-0.57
Jan 19740.48
Feb 1974-0.04
Dec 1974-1.02
Jan 19750.99
Feb 19750.36
Dec 1975-0.35
Jan 19760.66
Feb 19760.0
Dec 19760.27
Jan 19770.88
Feb 19770.22
Dec 1977-0.07
Jan 1978-0.6
Feb 1978-0.65
Dec 1978-0.7
Jan 19790.4
Feb 1979-0.57
Dec 1979-0.34
Jan 1980-0.32
Feb 1980-0.12
Dec 19800.35
Jan 1981-1.26
Feb 1981-0.53
Dec 1981-1.36
Jan 19821.2
Feb 19820.24
Dec 19820.44
Jan 1983-1.87
Feb 1983-1.84
Dec 19831.24
Jan 19841.07
Feb 1984-1.26
Dec 19841.34
Jan 19851.07
Feb 19850.77
Dec 19850.79
Jan 1986-0.95
Feb 1986-0.25
Dec 19860.08
Jan 19870.0
Feb 1987-0.51
Dec 1987-1.0
Jan 19880.78
Feb 19881.3
Dec 19880.65
Jan 19890.39
Feb 19891.4
Dec 19890.54
Jan 19900.81
Feb 19900.44
Dec 19901.26
Jan 19911.58
Feb 1991-0.05
Dec 1991-0.03
Jan 1992-0.73
Feb 1992-0.7
Dec 19920.35
Jan 1993-0.59
Feb 1993-0.25
Dec 1993-0.16
Jan 19940.78
Feb 19940.53
Dec 1994-1.1
Jan 1995-1.77
Feb 19950.83
Dec 1995-0.63
Jan 19960.46
Feb 1996-0.15
Dec 1996-0.35
Jan 1997-0.72
Feb 19970.49
Dec 1997-0.6
Jan 1998-1.55
Feb 1998-2.74
Dec 19981.05
Jan 19990.47
Feb 1999-1.42
Dec 1999-0.16
Jan 2000-0.11
Feb 2000-0.16
Dec 20000.27
Jan 2001-0.41
Feb 20010.95
Dec 2001-1.34
Jan 20020.58
Feb 2002-0.09
Dec 2002-0.58
Jan 2003-0.22
Feb 20031.75
Dec 2003-1.03
Jan 20040.18
Feb 2004-0.21
Dec 20041.11
Jan 2005-0.4
Feb 2005-0.28
Dec 2005-0.28
Jan 2006-0.77
Feb 20061.29
Dec 20060.33
Jan 20071.2
Feb 20070.71
Dec 20070.96
Jan 20080.16
Feb 20080.75
Dec 20081.73
Jan 20091.96
Feb 20090.25
Dec 2009-0.65
Jan 2010-1.33
Feb 2010-1.29
Dec 2010-2.87
Jan 20111.11
Feb 20110.79
Dec 20110.71
Jan 2012-0.21
Feb 20120.36
Dec 2012-1.3
Jan 20131.29
Feb 20130.87
Dec 20131.81
Jan 20141.57
Feb 20140.27
Dec 2014-0.18
Jan 20150.38
Feb 20150.66
Dec 20150.01
Jan 2016-0.25
Feb 20160.18
Dec 20160.95
Jan 2017-0.34
Feb 2017-0.11
Dec 20171.04
Jan 2018-0.33
Feb 20182.2
Dec 2018-0.62
Jan 20190.34
Feb 20191.64
Dec 2019-0.22
Jan 2020-0.87
Feb 20201.69
Dec 20200.17
Jan 2021-0.07
Feb 20211.27
Dec 2021-0.25
Jan 20220.66
Feb 20221.76
Dec 2022-0.7
Jan 2023-0.38
Feb 20231.67
Dec 2023-1.08
Jan 2024-0.26
Feb 2024-0.31