CSU Hurricane Seasonal Forecasting Archive

Previous Forecasts
Downloadable Data & Figures
In Memory of Dr. Bill Gray

Go back to main Forecasting page

Archived Forecast Discussions from Previous Years

Previous Forecasts

2020s
2010s
2000s
1990s
1980s

Seasonal Hurricane Forecast Verifications and Other Datasets

Downloadable Data & Figures

Forecast Verification
TC Statistics
AMO index
TC track & climatology

Verifications of CSU’s seasonal hurricane forecasts

Forecast Verification

CSU seasonal hurricane forecast (released in early April, June and August)
against the observed value each year

Tropical Cyclone Metric:

Named Storms
Named Storm Days
Hurricane
Hurricane Days

Major Hurricanes
Major Hurricane Days
Accumulated Cyclone Energy

Download Data for All Metrics (.xlsx)

The number of Named Storms in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	10	10	13
1985	---	11	12	11
1986	---	8	9	6
1987	---	8	7	7
1988	---	11	11	12
1989	---	7	12	11
1990	---	11	13	14
1991	---	8	8	8
1992	---	8	9	7
1993	---	11	11	8
1994	---	9	8	7
1995	10	12	21	19
1996	11	10	14	13
1997	11	11	16	8
1998	10	10	11	14
1999	14	14	15	12
2000	11	12	11	15
2001	10	12	13	15
2002	12	11	10	12
2003	12	14	18	16
2004	14	14	13	15
2005	13	15	20	28
2006	17	17	16	10
2007	17	17	16	15
2008	15	15	17	16
2009	12	11	10	9
2010	15	18	18	19
2011	16	16	16	19
2012	10	13	14	19
2013	18	18	18	14
2014	9	10	10	8
2015	7	8	8	11
2016	13	14	15	15
2017	11	14	16	17
2018	14	14	12	15
2019	13	14	14	18
2020	16	19	24	30
2021	17	18	18	21
2022	19	20	18	14
2023	13	15	18	20

The number of Named Storm Days in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	45.00	45.00	63.25
1985	---	55.00	55.50	51.25
1986	---	35.00	30.25	23.25
1987	---	40.00	35.00	37.25
1988	---	50.00	50.00	47.00
1989	---	30.00	40.00	65.25
1990	---	55.00	56.75	72.25
1991	---	35.00	31.75	24.25
1992	---	35.00	36.50	40.25
1993	---	55.00	51.00	29.75
1994	---	35.00	32.00	28.75
1995	50.00	65.00	79.00	121.25
1996	55.00	45.00	64.00	79.00
1997	55.00	55.00	58.25	30.00
1998	50.00	50.00	53.00	87.25
1999	65.00	75.00	79.50	78.50
2000	55.00	65.00	55.00	71.50
2001	50.00	60.00	62.00	68.75
2002	65.00	55.00	36.75	57.00
2003	65.00	70.00	77.75	81.50
2004	60.00	60.00	55.00	93.00
2005	65.00	75.00	96.00	126.25
2006	85.00	85.00	76.75	58.00
2007	85.00	85.00	76.75	37.75
2008	80.00	80.00	91.00	88.25
2009	55.00	50.00	45.00	30.00
2010	75.00	90.00	90.75	89.50
2011	80.00	80.00	81.25	89.75
2012	40.00	50.00	50.50	101.25
2013	95.00	95.00	85.00	42.25
2014	35.00	40.00	40.00	35.00
2015	30.00	30.00	25.00	43.50
2016	52.00	53.00	55.00	82.25
2017	50.00	60.00	70.00	93.00
2018	70.00	55.00	53.00	86.75
2019	50.00	55.00	55.00	70.00
2020	80.00	85.00	100.00	122.75
2021	80.00	80.00	80.00	79.75
2022	90.00	95.00	85.00	55.00
2023	55.00	60.00	90.00	100.50

The number of Hurricanes in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	7	7	5
1985	---	8	8	7
1986	---	4	5	4
1987	---	5	4	3
1988	---	7	7	5
1989	---	4	4	7
1990	---	7	7	8
1991	---	4	3	4
1992	---	4	4	4
1993	---	7	6	4
1994	---	5	4	3
1995	6	8	10	11
1996	7	6	9	9
1997	7	7	8	3
1998	6	6	6	10
1999	9	9	9	8
2000	7	8	7	8
2001	6	7	7	9
2002	7	6	4	4
2003	8	8	10	7
2004	8	8	7	9
2005	7	8	11	15
2006	9	9	7	5
2007	9	9	8	6
2008	8	8	9	8
2009	6	5	4	3
2010	8	10	10	12
2011	9	9	9	7
2012	4	5	6	10
2013	9	9	8	2
2014	3	4	4	6
2015	3	3	2	4
2016	6	6	6	7
2017	4	6	8	10
2018	7	6	5	8
2019	5	6	7	6
2020	8	9	12	14
2021	8	8	8	7
2022	9	10	8	8
2023	6	7	9	7

The number of Hurricanes Days in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	30.00	30.00	18.25
1985	---	35.00	30.50	21.25
1986	---	15.00	11.00	10.50
1987	---	20.00	15.00	5.00
1988	---	30.00	30.00	21.25
1989	---	15.00	15.00	31.75
1990	---	30.00	27.25	26.75
1991	---	15.00	10.00	8.25
1992	---	15.00	15.00	16.00
1993	---	25.00	25.00	9.50
1994	---	15.00	12.00	7.25
1995	25.00	35.00	30.75	61.50
1996	25.00	20.00	31.50	45.00
1997	25.00	25.00	22.25	9.50
1998	20.00	25.00	25.00	48.50
1999	40.00	40.00	40.00	41.00
2000	25.00	35.00	30.00	32.75
2001	25.00	30.00	30.00	25.50
2002	30.00	25.00	12.00	10.75
2003	35.00	35.00	25.00	32.75
2004	35.00	35.00	30.00	45.50
2005	35.00	45.00	55.25	49.75
2006	45.00	45.00	35.00	21.25
2007	40.00	40.00	35.00	12.25
2008	40.00	40.00	45.00	30.50
2009	25.00	20.00	18.00	12.00
2010	35.00	40.00	40.00	38.50
2011	35.00	35.00	35.00	26.00
2012	16.00	18.00	20.00	28.50
2013	40.00	40.00	35.00	3.25
2014	12.00	15.00	15.25	17.75
2015	10.00	10.00	8.00	12.00
2016	21.00	21.00	22.00	27.75
2017	16.00	25.00	35.00	51.75
2018	30.00	20.00	15.00	27.50
2019	16.00	20.00	20.00	23.50
2020	35.00	40.00	45.00	35.25
2021	35.00	35.00	35.00	27.75
2022	35.00	40.00	30.00	21.00
2023	25.00	30.00	35.00	31.50

The number of Major Hurricanes in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	---	---	1
1985	---	---	---	3
1986	---	---	---	0
1987	---	---	---	1
1988	---	---	---	3
1989	---	---	---	2
1990	---	3	2	1
1991	---	1	0	2
1992	---	1	1	1
1993	---	2	2	1
1994	---	1	1	0
1995	2	3	3	5
1996	3	2	4	6
1997	3	3	2	1
1998	2	2	2	3
1999	4	4	4	5
2000	3	4	3	3
2001	2	3	3	4
2002	3	2	1	2
2003	3	3	3	3
2004	3	3	3	6
2005	3	4	6	7
2006	5	5	3	2
2007	5	5	4	2
2008	4	4	5	5
2009	2	2	2	2
2010	4	5	5	5
2011	5	5	5	4
2012	2	2	2	2
2013	4	4	3	0
2014	1	1	1	2
2015	1	1	1	2
2016	2	2	2	4
2017	2	2	3	6
2018	3	2	1	2
2019	2	2	2	3
2020	4	4	5	7
2021	4	4	4	4
2022	4	5	4	2
2023	2	3	4	3

The number of Major Hurricanes Days in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	---	---	0.75
1985	---	---	---	4.00
1986	---	---	---	0.00
1987	---	---	---	0.50
1988	---	---	---	9.25
1989	---	---	---	9.75
1990	---	---	5.00	1.00
1991	---	2.00	0.00	1.25
1992	---	2.00	2.00	3.50
1993	---	3.00	2.00	0.75
1994	---	1.00	1.00	0.00
1995	5.00	6.00	5.00	11.50
1996	5.00	5.00	4.50	13.00
1997	5.00	5.00	4.00	2.25
1998	4.00	5.00	5.00	9.50
1999	10.00	10.00	10.00	14.25
2000	6.00	8.00	6.00	5.00
2001	4.00	5.00	5.00	4.25
2002	6.00	5.00	2.00	3.00
2003	8.00	8.00	5.00	16.75
2004	8.00	8.00	6.00	22.25
2005	7.00	11.00	18.75	17.50
2006	13.00	13.00	8.00	2.00
2007	11.00	11.00	10.00	6.00
2008	9.00	9.00	11.00	7.50
2009	5.00	4.00	4.00	3.50
2010	10.00	13.00	13.00	11.00
2011	10.00	10.00	10.00	4.50
2012	3.00	4.00	5.00	0.50
2013	9.00	9.00	7.00	0.00
2014	2.00	3.00	3.00	3.75
2015	0.50	0.50	0.50	4.00
2016	4.00	4.00	5.00	10.25
2017	4.00	5.00	7.00	19.25
2018	7.00	4.00	2.00	5.25
2019	4.00	5.00	5.00	9.50
2020	9.00	9.00	11.00	8.25
2021	9.00	9.00	9.00	12.75
2022	9.00	11.00	8.00	5.75
2023	5.00	7.00	9.00	7.25

Accumulated Cyclone Energy index (in 10⁴ knots²) in each Atlantic hurricane season

All columns are sortable - click ()

Year	April	June	August	Observed
1984	---	109	109	84
1985	---	129	117	88
1986	---	60	47	36
1987	---	77	59	34
1988	---	112	112	103
1989	---	57	66	135
1990	---	115	103	97
1991	---	55	34	36
1992	---	55	57	76
1993	---	91	84	38
1994	---	63	51	32
1995	92	130	137	227
1996	97	87	125	166
1997	102	102	112	41
1998	87	92	104	181
1999	150	150	153	177
2000	116	150	121	119
2001	92	111	114	110
2002	116	92	56	67
2003	130	135	130	176
2004	135	135	116	227
2005	126	159	228	245
2006	183	183	132	83
2007	174	174	152	74
2008	150	150	175	146
2009	100	85	80	53
2010	150	185	185	165
2011	160	160	160	126
2012	70	80	99	133
2013	165	165	142	36
2014	55	65	65	67
2015	40	40	35	63
2016	101	103	110	143
2017	75	100	135	225
2018	130	90	64	133
2019	80	100	105	132
2020	150	160	200	180
2021	150	150	150	146
2022	160	180	150	94
2023	100	125	160	148

Historical Tropical Cyclone Statistics

TC Statistics

Statistics are calculated from best tracks archived in the International Best Track Archive for Climate Stewardship (IBTrACS, available online HERE).
In the Southern Hemishphere, tropical cyclone seasons are defined to start on July 1 of the previous year.
For example, the 1980 season ran from July 1, 1979 through June 30, 1980.

Historical Tropical Cyclone Statistics over each basin

North Atlantic
Eastern North Pacific
Western North Pacific

North Indian
South Indian
South Pacific

Northern Hemisphere
Southern Hemisphere
Global

North Atlantic Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1851	6	23.75	3	7.5	1	1	36.2
1852	5	33.25	5	23.5	1	2.5	73.3
1853	8	25	4	20.5	2	9.25	76.5
1854	5	14.5	3	7.25	1	2	31
1855	5	8.5	4	4	1	1	18.1
1856	6	23.5	4	12.75	2	2.5	48.9
1857	4	25	3	15	0	0	46.8
1858	6	21	6	15	0	0	44.8
1859	8	23.25	7	16.5	1	3	55.7
1860	7	29.75	6	17.5	1	1.5	62.1
1861	8	26.25	6	13.5	0	0	49.7
1862	6	21	3	13.25	0	0	46
1863	9	26	5	15.75	0	0	50.4
1864	5	16.75	3	9.5	0	0	26.6
1865	7	23	3	13	0	0	49.1
1866	7	29.5	6	26	1	4.5	83.7
1867	9	29	7	19.25	1	0.75	60
1868	4	16	3	10.5	0	0	34.7
1869	10	21	7	16.25	1	1	51
1870	11	38.25	10	28.25	2	2.5	87.8
1871	8	48.25	6	22.5	2	3.25	88.4
1872	5	41.5	4	22.25	0	0	65.4
1873	5	35.5	3	20.75	2	2.5	69.5
1874	7	35.25	4	11	0	0	47.1
1875	6	37	5	26.25	1	0.5	72.5
1876	5	31	4	15.25	2	1.25	57.1
1877	8	49.5	3	20.75	1	0.25	73.4
1878	12	90	10	50.25	2	10	180.9
1879	8	43	6	12.25	2	2	63.6
1880	11	68.75	9	35.5	2	4.75	131.1
1881	7	37.25	4	15	0	0	59.3
1882	6	33.5	4	18	2	1.5	59.5
1883	4	28.5	3	20.5	2	4	66.7
1884	4	35.75	4	22.5	1	2	72.1
1885	8	41.5	6	13.5	0	0	58.3
1886	12	84.25	10	49.5	4	4.5	166.2
1887	19	106.25	11	47	2	6.75	181.3
1888	9	50.75	6	21	2	2.25	84.9
1889	9	73.75	6	22.25	0	0	104
1890	4	19.25	2	7.25	1	2	33.3
1891	10	66	7	39.5	1	1.25	116.1
1892	9	73.5	5	32.5	0	0	115.8
1893	12	98.75	10	61.5	5	22	231.1
1894	7	60	5	39	4	9	135.4
1895	6	42.75	2	16.5	0	0	68.8
1896	7	59.5	6	41.5	2	6.25	136.1
1897	6	41	3	11.75	0	0	54.5
1898	11	72	5	23.5	1	1.5	113.2
1899	10	73	5	37	2	16.5	151
1900	7	52.25	3	19.25	2	3.25	83.3
1901	13	85.75	6	18.75	0	0	99
1902	5	24.25	3	7	0	0	32.7
1903	10	60.25	7	30.25	1	3.75	102.1
1904	6	31.5	4	5.25	0	0	30.3
1905	5	26.25	1	3.25	1	1.25	28.4
1906	11	93.75	6	36.5	3	11	162.9
1907	5	20.5	0	0	0	0	13.1
1908	10	60	6	26.5	1	2.75	95.1
1909	12	56	6	24	4	6.5	93.3
1910	5	27	3	18.5	1	2.75	63.9
1911	6	30	3	7	0	0	34.7
1912	7	39.25	4	13.75	1	1.75	57.3
1913	6	35.5	4	4	0	0	35.6
1914	1	3.25	0	0	0	0	2.5
1915	6	48.25	5	30.5	3	13.75	130.1
1916	15	82.75	10	36.75	5	6.25	144
1917	4	24.5	2	13.5	2	6.75	60.7
1918	6	30.25	4	7.5	1	0.75	39.9
1919	5	23.25	2	9.25	1	6.5	55
1920	5	21.5	4	7.75	0	0	29.8
1921	7	41.5	5	22.25	2	7.25	86.5
1922	5	27.25	3	14	1	6	54.5
1923	9	35.25	4	11.75	1	1.5	49.3
1924	11	58.75	5	22.5	2	4.25	100.2
1925	4	9.5	1	1	0	0	7.3
1926	11	86.75	8	58.5	6	22.75	229.6
1927	8	37.75	4	12	1	3.25	56.5
1928	6	42.5	4	15	1	5.25	83.5
1929	5	21.5	3	9.75	1	3.75	48.1
1930	3	26.25	2	11.5	2	3.5	49.8
1931	13	48.25	3	5.25	1	0.5	47.8
1932	15	85.25	6	27.75	4	13	169.7
1933	20	125.25	11	57	6	21.75	258.6
1934	13	63.5	7	18.75	1	0.5	79.1
1935	8	50.5	5	24.25	3	9.25	106.2
1936	17	66	7	25.75	1	2	99.8
1937	11	43.5	4	16	1	2.25	65.9
1938	9	39.75	4	15.5	2	5.75	77.6
1939	6	31.5	3	6.5	1	2.75	43.7
1940	9	46.75	6	18.5	0	0	67.8
1941	6	33.75	4	11.5	3	2	51.8
1942	11	51	4	13	1	1.25	62.5
1943	10	48.75	5	22.5	2	4.5	94
1944	14	60.25	8	24.5	3	5.75	104.5
1945	11	39.75	5	15.5	2	3.75	63.4
1946	7	15.5	3	5.5	0	0	19.6
1947	10	48.75	5	18.5	2	6.25	88.5
1948	10	49.5	6	20.75	4	7.25	95
1949	16	66	7	21	2	4	96.4
1950	16	103	11	53	6	15.5	211.3
1951	12	67	8	34.25	3	4.5	126.3
1952	11	45.75	5	15.5	2	2.5	69.1
1953	14	61.75	7	19	3	5	98.5
1954	16	57	7	26	3	7	104.4
1955	13	85.5	9	43	4	8.5	164.7
1956	12	36	4	13	1	1.75	56.7
1957	8	41.25	3	21	2	3.75	78.7
1958	12	58.75	7	26.75	3	6.25	109.7
1959	14	51.25	7	16.25	2	3.25	77.1
1960	8	33.5	4	15	2	8.5	72.9
1961	12	79.25	8	46.25	5	16	188.9
1962	7	37.5	4	11.75	0	0	50.5
1963	10	57.25	7	32.25	3	4.5	112.1
1964	13	77.5	7	39.25	5	9	153
1965	10	48.25	4	19.5	1	6.25	86.7
1966	11	64	7	41.75	3	8.75	145.2
1967	8	58	6	36.25	1	5.75	121.7
1968	8	33.75	5	11.75	0	0	45.1
1969	18	92.25	12	40.25	5	6.5	165.7
1970	10	30.25	5	6.75	2	1	40.2
1971	13	63	6	28.75	1	1	96.8
1972	7	30.75	3	6.25	0	0	35.6
1973	8	37.75	4	10	1	0.25	47.9
1974	11	42.25	4	14.25	2	4.25	68.4
1975	9	46.5	6	20.5	3	2.25	76.1
1976	10	49.5	6	25.5	2	1	84.2
1977	6	14.75	5	6.75	1	1	25.3
1978	12	43.5	5	13.5	2	3.5	63.2
1979	9	45.75	6	21.75	2	5.75	92.9
1980	11	62.25	9	38.25	2	7.25	148.9
1981	12	66	7	22.5	3	3.75	100.3
1982	6	18.5	2	5.75	1	1.25	31.5
1983	4	14.5	3	3.5	1	0.25	17.4
1984	13	63.25	5	18.25	1	0.75	84.3
1985	11	51.25	7	21.25	3	4	88
1986	6	23.25	4	10.5	0	0	35.8
1987	7	37.25	3	5	1	0.5	34.4
1988	12	47	5	21.25	3	9.25	103
1989	11	65.75	7	31.75	2	9.75	135.1
1990	14	72.25	8	26.75	1	1	96.8
1991	8	24.25	4	8.25	2	1.25	35.5
1992	7	40.25	4	16	1	3.5	76.2
1993	8	30	4	9.5	1	0.75	38.7
1994	7	28.75	3	7.25	0	0	32
1995	19	121.25	11	61.5	5	11.5	227.1
1996	13	79	9	45	6	13	166.2
1997	8	30	3	9.5	1	2.25	40.9
1998	14	88	10	48.5	3	9.5	181.8
1999	12	78.5	8	41	5	14.25	176.5
2000	15	71.5	8	32.75	3	5	119.1
2001	15	68.75	9	25.5	4	4.25	110.1
2002	12	57	4	10.75	2	3	67.4
2003	16	81.5	7	32.75	3	16.75	176.3
2004	15	93	9	45.5	6	22.25	226.9
2005	28	126.25	15	49.75	7	17.5	245.3
2006	10	58	5	21.25	2	2	83.3
2007	15	37.75	6	12.25	2	6	73.9
2008	16	88.25	8	30.5	5	7.5	145.7
2009	9	30	3	12	2	3.5	52.6
2010	19	89.5	12	38.5	5	11	165.5
2011	19	89.75	7	26	4	4.5	126.3
2012	19	101.25	10	28.5	2	0.5	132.6
2013	14	42.25	2	3.25	0	0	36.1
2014	8	35	6	17.75	2	3.75	66.7
2015	11	43.5	4	12	2	4	62.7
2016	15	81	7	27.75	4	10.25	141.3
2017	17	93	10	51.75	6	19.25	224.9
2018	15	87.25	8	26.75	2	5	129
2019	18	68.5	6	23.25	3	10	129.8

Download Table (.csv)

Eastern North Pacific Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1971	17	84.25	11	38.5	6	6	139.3
1972	14	84	8	33.75	4	4.5	137.2
1973	12	62.25	7	28.5	3	7.25	114.7
1974	17	63.25	10	22.75	3	2.5	90.3
1975	17	71.75	9	26.75	4	5.5	112.6
1976	15	66.5	9	27.25	5	9.75	121.5
1977	8	20.5	4	5.25	0	0	22.3
1978	19	103.75	14	51.5	7	16	207.7
1979	10	33.75	6	13.75	4	3.25	57.4
1980	15	49.5	7	22.75	3	2.75	78.3
1981	15	58	8	18.25	1	1	72.8
1982	23	107	12	39.25	5	7.5	161.2
1983	21	110	12	47.75	8	16.25	206.2
1984	22	104.25	13	46.25	7	14.75	193.7
1985	24	109	13	49.75	8	8.5	193.1
1986	17	62.75	9	28.75	3	6.75	107.8
1987	20	79	10	29.5	4	7.75	133.9
1988	14	65.25	7	29.5	3	6.5	114.3
1989	18	69	9	27.25	4	5.75	111.8
1990	21	125.75	16	58.25	6	20.25	249.5
1991	14	89.75	10	44	5	14	180.4
1992	27	153.75	16	65.5	10	20.75	294.3
1993	15	86.75	11	50.75	9	16.75	201.8
1994	20	85.5	10	33	5	17	185.2
1995	10	51.75	7	22.25	3	9	100.2
1996	9	32.5	5	13	2	3.25	53.9
1997	20	81.5	9	33.5	7	15	170.8
1998	13	65.75	9	33	6	10.75	135.6
1999	9	44.5	6	23.5	2	6	90.2
2000	19	67.75	6	16.75	2	4.75	96
2001	16	58.5	8	18.5	2	5	90.6
2002	15	65	8	26	6	9	124.6
2003	16	49.75	7	11	0	0	56.6
2004	12	42	6	14	3	5.75	71.1
2005	15	61.5	7	23.5	2	5	96.6
2006	19	76.25	11	34	6	12.25	156.9
2007	11	39.25	4	8.75	1	3.25	52.6
2008	17	64.5	7	19	2	2.25	83.8
2009	20	72	8	23	5	9	126.4
2010	8	31.75	3	11.5	2	2.75	51.2
2011	11	55.75	10	26.75	6	11.5	120.9
2012	17	67	10	21.5	5	4	98.5
2013	20	64	9	14.5	1	0.75	74.8
2014	22	120.5	16	44.5	9	11	202.4
2015	26	132.75	16	62.25	11	24.75	290.2
2016	21	94.75	12	33	5	8	156.2
2017	18	67.75	9	20	4	4.5	100.7
2018	23	126.5	13	67.5	10	35	317.1
2019	19	66.25	7	17.25	4	6	97.5

Download Table (.csv)

Western North Pacific Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1950	18	79	12	40	6	11.25	160.2
1951	17	118.75	16	79.5	11	22	283.4
1952	28	148	20	72	11	28.75	338
1953	23	140.5	17	78	14	33.25	362.6
1954	18	125	15	73.75	10	25.75	305.5
1955	22	113.5	19	57.75	10	19.25	249.8
1956	22	114	18	75.5	9	25.5	305.6
1957	20	156	17	100.25	15	41.5	440.2
1958	22	136	20	95.25	15	50.5	445.8
1959	22	135.75	16	75.5	13	38.25	397.6
1960	27	165.75	19	81	9	21	326.7
1961	27	120.75	20	68.75	9	36.5	365.6
1962	30	160	23	92.5	12	36.25	423
1963	25	138.75	19	88	14	40.75	386
1964	38	165.25	26	87	13	34.25	403.1
1965	34	163.75	21	86.5	15	43	436.3
1966	30	148.75	20	65.25	8	18.25	302.2
1967	34	191.5	19	88.75	11	28.5	398.1
1968	27	167.5	20	75.75	13	29	356.8
1969	19	95	13	47	7	16.5	203.7
1970	24	118.5	12	67	11	25	287.5
1971	35	169.5	25	86.25	11	26	380.2
1972	29	207.75	22	103	14	26.5	413
1973	21	85.25	12	33.75	4	8	148.1
1974	32	140.5	16	48.75	3	4.25	205.3
1975	20	90.75	14	35	5	11	171
1976	25	151.25	14	62.5	9	25.75	301.3
1977	19	95.75	11	33	4	11.25	164.1
1978	28	147.75	15	47.75	3	9.25	236.8
1979	23	130	14	60	8	20	278.4
1980	23	130	15	51	9	16.75	237.8
1981	28	128.75	16	50.5	6	11	227
1982	25	176.75	19	86	12	23.5	356.1
1983	23	98	12	42.25	6	20.5	219.7
1984	27	133.25	16	61.75	9	20.75	274
1985	25	135	17	58.75	6	5.5	231.2
1986	26	171.75	19	84.25	8	16	334.2
1987	23	149	17	84	12	31.25	356.5
1988	25	112.75	13	55.5	7	16.5	227.9
1989	30	156	21	69	9	19.25	305
1990	30	170.75	21	91.75	8	26.25	377.8
1991	29	180.25	20	87.25	11	37.75	414.3
1992	31	196.75	21	104.75	11	39	470.1
1993	29	154	20	59	9	16.5	267.1
1994	34	228	20	95	12	35.25	454.6
1995	26	124	15	52	7	20.25	255.1
1996	33	192.75	21	95	10	31.75	416.5
1997	29	202.5	23	114.25	12	54.25	570.4
1998	18	74.75	9	37.25	5	9.5	152.9
1999	23	67.5	11	26.75	4	6.25	109.9
2000	25	126.5	14	59.25	7	16.5	252.9
2001	29	143.5	21	79.75	12	20.25	307.3
2002	24	145.5	16	86.25	11	39	390.6
2003	22	137.75	17	76.5	11	30.75	337.4
2004	31	183.5	20	102.5	14	48.5	480.6
2005	24	130.25	18	66.25	10	31.25	309.9
2006	21	128	13	70	10	29.75	321.3
2007	22	97	16	53.25	9	16.75	219.5
2008	27	94.25	12	36.5	8	12	178.4
2009	23	119.75	15	53.25	7	24.5	278.1
2010	14	63.75	9	26	4	9.5	121.4
2011	18	97.25	10	39.25	7	15.25	189.7
2012	25	142	15	61.5	10	25.25	302.3
2013	27	117.25	16	57.5	11	20.75	276.3
2014	20	112.5	12	54.5	7	26	277.8
2015	26	195.25	20	105.5	16	41	462.9
2016	26	113.5	17	51	11	22.5	261.9
2017	26	106.5	13	38.75	5	5.5	169.4
2018	28	138.75	16	66.25	9	29	334.7
2019	27	132.25	16	54	10	22.25	269.4

Download Table (.csv)

North Indian Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1972	4	13.5	4	7.25	0	0	22
1973	4	13.75	0	0	0	0	13.3
1974	1	3.75	1	1.5	0	0	5.2
1975	5	21.5	3	8	0	0	28
1976	5	10.5	0	0	0	0	7.7
1977	5	15.5	2	8.25	2	4	37.1
1978	4	15.75	2	4	0	0	18.5
1979	5	13	1	3	0	0	15.2
1980	3	3.25	0	0	0	0	1.6
1981	3	13.5	2	2.5	0	0	16.4
1982	5	15	2	3.75	1	1	20.7
1983	3	5.25	0	0	0	0	4.2
1984	4	17	2	4.25	0	0	20.8
1985	6	13.5	0	0	0	0	10.8
1986	3	4.75	0	0	0	0	2.9
1987	8	19.5	0	0	0	0	14.6
1988	5	12	1	4	1	0.75	17.4
1989	2	9.5	0	5.25	0	2.5	25.4
1990	2	9	1	3.25	1	2	18.3
1991	4	11	1	3.5	1	1.75	20.3
1992	10	36.75	3	4	1	2	39.7
1993	2	6.75	2	2.5	0	0	8.8
1994	5	12	1	2.25	1	1	15.4
1995	4	11	2	2.5	1	0.75	14.3
1996	8	32.25	4	3.75	1	1	33.9
1997	4	18.75	2	4.75	1	1.25	25.8
1998	8	21.5	5	6.5	1	0.5	27.9
1999	5	17.25	3	9.5	3	5.25	44.3
2000	4	10	2	1.5	0	0	9.4
2001	3	9	1	3.75	1	1	15.4
2002	5	10.75	0	0	0	0	6.4
2003	4	14.5	1	1.25	0	0	13.5
2004	5	17	2	1.75	0	0	13.4
2005	6	18	0	0	0	0	13.4
2006	6	11	1	2.5	1	1	15.4
2007	6	17	3	7.75	2	5.25	46.1
2008	6	14.5	1	4.75	1	1.25	19.8
2009	5	10.25	1	0.25	0	0	7.8
2010	5	19.5	3	5	2	2.25	31.7
2011	6	9.5	1	2.25	0	0	10.6
2012	4	6.75	0	0	0	0	4.1
2013	6	28.75	4	9.25	1	2.5	45.6
2014	5	16.25	2	6	2	2.5	29.9
2015	5	18.5	2	6.75	2	4.25	37.5
2016	5	14.5	1	2.25	0	0	14.5
2017	4	11.75	2	4.25	1	0.25	16.9
2018	6	26	4	6.5	1	0.5	30.9
2019	7	39.25	6	19.75	3	7.5	88.6

Download Table (.csv)

South Indian Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1980	14	115	11	40	6	8.25	188.1
1981	12	56.5	6	20.25	5	3.75	86
1982	16	72.5	6	23	2	4.5	105.5
1983	9	36.25	4	4.75	0	0	38.2
1984	20	101	10	36.25	3	7.25	153.3
1985	20	97.25	8	16	2	4	112.7
1986	21	101.25	10	37	5	8.25	156.5
1987	11	59.5	4	7.75	0	0	54
1988	13	57.5	6	14	2	4.5	79
1989	17	90.5	13	43.75	6	10.75	172.1
1990	17	95.25	9	37	4	8.25	160.6
1991	14	72.5	6	21.75	2	4	108.5
1992	14	67.75	7	36.25	7	15.5	157.2
1993	12	57.25	6	18	2	4.5	87.4
1994	22	123.5	13	50.75	7	14.5	230.5
1995	14	79	10	34	7	10	141.8
1996	18	93.5	13	44.25	7	16	201.5
1997	20	137.75	12	42.5	5	13.75	213.3
1998	15	66.25	6	14	2	4	80.4
1999	20	84	10	30	6	14.5	154.7
2000	17	107	12	48	7	14	197.6
2001	14	57.5	9	26.25	4	6	102.8
2002	17	84	10	36.5	7	15.75	175.5
2003	18	83.75	10	36.5	5	13	157.6
2004	15	98.25	12	39.75	6	14.75	178.4
2005	18	67.75	7	26.75	4	11.75	130.8
2006	15	58	5	19.5	5	8.75	101.8
2007	14	78.75	11	38.25	8	13	160
2008	21	103	10	32.5	5	7.75	156.5
2009	18	62.25	7	14.5	4	5.5	81.6
2010	14	57.75	8	19.75	5	9	104.4
2011	12	46.75	5	10.25	1	0.75	53.9
2012	16	76	9	24.5	2	7.75	122.8
2013	16	69	10	30	6	7.25	120.7
2014	14	63.5	9	25.25	7	13.75	137.1
2015	16	67	8	27.5	5	10.75	130.4
2016	9	45.25	5	19	3	8.5	98.9
2017	11	47.5	5	9.25	2	2.5	61.8
2018	11	62.5	9	23.75	4	10.5	115.8
2019	18	99.5	13	45.5	11	19.75	204.4

Download Table (.csv)

South Pacific Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1980	10	41.25	3	5.25	1	0.5	43.1
1981	5	22.25	3	5.25	0	0	24.6
1982	5	32	4	7	0	0	35.1
1983	14	94	10	42	5	6.5	160.6
1984	10	33.5	3	3.5	1	1.5	36.8
1985	15	55.5	7	18.5	5	5.75	89.9
1986	10	39.5	5	9	0	0	45.1
1987	14	56.75	7	12.25	1	0.25	66.6
1988	7	37.75	4	9.75	2	3	56.9
1989	11	51.25	6	21.5	4	6.75	97.4
1990	7	33.25	3	7.5	1	3.5	45.8
1991	4	26	3	8.25	1	2.25	40.7
1992	15	75.25	9	37.25	4	10.75	160.9
1993	14	72.75	8	32.75	5	9.75	139.9
1994	6	37.75	4	21	4	9	87
1995	6	20	3	4.5	1	1	25.7
1996	9	31.25	3	5.5	1	1.25	33.9
1997	17	98.75	9	28.75	3	8	145.1
1998	20	100.75	12	37.75	4	8.5	178
1999	12	42.25	3	12	1	2.25	58.5
2000	9	23.5	4	5.5	1	0.5	27
2001	7	19.5	2	5.5	1	1.25	26.6
2002	8	15.75	2	4	1	1	18.2
2003	10	41.75	7	21.75	6	9.75	104.9
2004	6	16.75	2	9.5	2	4.75	42.6
2005	8	38.75	6	27	5	15.25	128.7
2006	8	29.75	5	13.5	2	3.25	57.9
2007	9	19.75	4	4.75	1	0.75	25.1
2008	7	27	4	9.75	3	2.5	43.3
2009	9	20	1	4.75	1	3.25	33.7
2010	10	45	7	20.75	4	8.75	93.9
2011	9	37.5	5	15	3	4.5	68.9
2012	4	15.75	1	5	1	2.25	25.5
2013	8	34.5	5	15.5	3	5.25	65.2
2014	10	32	3	9.75	2	3.75	55.2
2015	9	41.75	5	12.75	4	5.25	74.8
2016	11	55	5	25.25	2	7.25	110.4
2017	8	30.25	4	11.75	2	2.25	48.7
2018	8	37.75	4	13.25	1	4	62.8
2019	9	45.25	4	10.75	1	0.75	53.6

Download Table (.csv)

Northern Hemispheric Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1971	65	316.25	42	153.5	18	33	616.1
1972	54	336	37	150.25	18	31	607.8
1973	45	199	23	72.25	8	15.5	324
1974	61	249	31	87.25	8	11	368.8
1975	51	230.5	32	90.25	12	18.75	387.7
1976	55	277.75	29	115.25	16	36.5	514.6
1977	38	146.5	22	53.25	7	16.25	248.7
1978	63	310.75	36	116.75	12	28.75	526.3
1979	47	222.5	27	98.5	14	29	443.9
1980	52	245	31	112	14	26.75	466.7
1981	58	266.25	33	93.75	10	15.75	416.4
1982	59	317.25	35	134.75	19	33.25	569.5
1983	51	227.75	27	93.5	15	37	447.5
1984	66	317.75	36	130.5	17	36.25	572.7
1985	66	308.75	37	129.75	17	18	523.1
1986	52	262.5	32	123.5	11	22.75	480.6
1987	58	284.75	30	118.5	17	39.5	539.4
1988	56	236.75	26	110.25	14	33	462.4
1989	61	299.75	37	133.25	15	37.25	577.1
1990	67	377.75	46	180	16	49.5	742.4
1991	55	305.25	35	143	19	54.75	650.6
1992	75	427.5	44	190.25	23	65.25	880.3
1993	54	277.25	37	121.75	19	34	516.1
1994	66	354.25	34	137.5	18	53.25	687.2
1995	59	308	35	138.25	16	41.5	596.7
1996	63	336.25	39	156.75	19	49	670.3
1997	61	332.75	37	162	21	72.75	807.9
1998	53	249.25	33	125.25	15	30.25	497.6
1999	49	207.75	28	100.75	14	31.75	421
2000	63	275.75	30	110.25	12	26.25	477.5
2001	63	279.75	39	127.5	19	30.5	523.4
2002	56	278.25	28	123	19	51	589
2003	58	283.5	32	121.5	14	47.5	583.8
2004	63	335.5	37	163.75	23	76.5	792
2005	73	341.25	40	139.5	19	53.75	670
2006	56	268	30	127.75	19	45	572.2
2007	54	191	29	82	14	31.25	392.1
2008	66	261.5	28	90.75	16	23	427.7
2009	57	232	27	88.5	14	37	464.9
2010	46	206.25	27	81	13	25.5	370.8
2011	54	253.25	28	94.25	17	31.25	448.2
2012	65	317	35	111.5	17	29.75	537.5
2013	67	253.25	31	84.5	13	24	433.3
2014	55	284.25	36	122.75	20	43.25	576.8
2015	68	390	42	186.5	31	74	853.3
2016	67	303.75	37	114	20	40.75	573.9
2017	67	282.75	34	114.75	16	29.5	513.9
2018	72	377.5	41	167	22	69.5	811.2
2019	71	306.25	35	114.25	20	45.75	585.3

Download Table (.csv)

Southern Hemispheric Ocean Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1980	24	156.25	14	45.25	7	8.75	231.1
1981	17	78.75	9	25.5	5	3.75	110.7
1982	21	104.5	10	30	2	4.5	140.6
1983	23	130.25	14	46.75	5	6.5	198.8
1984	30	134.5	13	39.75	4	8.75	190.2
1985	35	152.75	15	34.5	7	9.75	202.6
1986	31	140.75	15	46	5	8.25	201.6
1987	25	116.25	11	20	1	0.25	120.7
1988	20	95.25	10	23.75	4	7.5	135.8
1989	28	141.75	19	65.25	10	17.5	269.5
1990	24	128.5	12	44.5	5	11.75	206.4
1991	18	98.5	9	30	3	6.25	149.3
1992	29	143	16	73.5	11	26.25	318.2
1993	26	130	14	50.75	7	14.25	227.4
1994	28	161.25	17	71.75	11	23.5	317.6
1995	20	99	13	38.5	8	11	167.5
1996	27	124.75	16	49.75	8	17.25	235.4
1997	37	236.5	21	71.25	8	21.75	358.4
1998	35	167	18	51.75	6	12.5	258.4
1999	32	126.25	13	42	7	16.75	213.2
2000	26	130.5	16	53.5	8	14.5	224.6
2001	21	77	11	31.75	5	7.25	129.3
2002	25	99.75	12	40.5	8	16.75	193.7
2003	28	125.5	17	58.25	11	22.75	262.5
2004	22	118	15	51.25	8	19.5	226.2
2005	26	106.5	13	53.75	9	27	259.5
2006	23	87.75	10	33	7	12	159.7
2007	23	98.5	15	43	9	13.75	185
2008	28	130	14	42.25	8	10.25	199.8
2009	27	82.25	8	19.25	5	8.75	115.3
2010	24	102.75	15	40.5	9	17.75	198.3
2011	21	84.25	10	25.25	4	5.25	122.8
2012	20	91.75	10	29.5	3	10	148.3
2013	24	103.5	15	45.5	9	12.5	185.9
2014	24	95.5	12	35	9	17.5	192.3
2015	25	108.75	13	40.25	9	16	205.2
2016	20	100.25	10	44.25	5	15.75	209.3
2017	19	77.75	9	21	4	4.75	110.6
2018	19	100.25	13	37	5	14.5	178.6
2019	27	144.75	17	56.25	12	20.5	258

Download Table (.csv)

Global Historical TC statistics

All columns are sortable - click ()

Year	Named Storms	Named Storm Days	Hurricanes	Hurricane Days	Major Hurricanes	Major Hurricane Days	Accumulated Cyclone Energy
1980	72	401.25	43	157.25	19	35.5	697.8
1981	79	345	44	119.25	15	19.5	527.1
1982	81	421.75	46	164.75	21	37.75	710.1
1983	79	358	42	140.25	21	43.5	646.2
1984	94	452.25	47	170.25	20	45	762.9
1985	95	461.5	51	164.25	24	27.75	725.7
1986	86	403.25	48	169.5	16	31	682.2
1987	83	401	39	138.5	18	39.75	660.1
1988	74	332	39	134	19	40.5	598.3
1989	91	441.5	55	198.5	25	54.75	846.6
1990	90	506.25	58	224.5	21	61.25	948.7
1991	79	403.75	47	173	25	61	799.9
1992	101	570.5	59	263.75	32	91.5	1198.4
1993	78	407.25	49	172.5	24	48.25	743.5
1994	93	515.5	51	209.25	31	76.75	1004.8
1995	79	407	49	176.75	24	52.5	764.3
1996	98	461	57	206.5	27	66.25	905.7
1997	95	569.25	58	233.25	28	94.5	1166.3
1998	89	416.25	50	177	21	42.75	756
1999	74	334	39	142.75	21	48.5	634.2
2000	89	406.25	45	163.75	20	40.75	702.1
2001	88	356.75	51	159.25	24	37.75	652.7
2002	81	378	41	163.5	27	67.75	782.7
2003	85	409	50	179.75	25	70.25	846.3
2004	86	453.5	51	215	32	96	1018.2
2005	96	447.75	51	193.25	27	80.75	929.5
2006	81	355.75	42	160.75	27	57	731.9
2007	80	289.5	44	125	22	45	577.1
2008	90	391.5	40	133	24	33.25	627.5
2009	85	314.25	38	107.75	21	45.75	580.2
2010	68	309	39	121.5	19	43.25	569.1
2011	75	337.5	39	119.5	21	36.5	571
2012	88	408.75	47	141	24	39.75	685.8
2013	90	356.75	46	130	22	36.5	619.2
2014	77	379.75	46	157.75	26	60.75	769.1
2015	95	498.75	54	226.75	39	90	1058.5
2016	83	404	46	158.25	25	56.5	783.2
2017	84	360.5	43	135.75	20	34.25	624.4
2018	99	477.75	58	204	30	84	989.8
2019	90	419.5	48	157.75	29	61.5	785.25

Download Table (.csv)

CSU Atlantic Multi-Decadal Oscillation (AMO) index

AMO index

In 2008, Phil Klotzbach and Bill Gray published a paper in Journal of Climate discussing a newly-developed Atlantic Multi-Decadal Oscillation index that utilized a combination of two predictors: 1) Sea surface temperatures (SSTs) in the far North Atlantic from 50-60°N, 50-10°W and 2) sea level pressures (SLPs) in the North Atlantic from 0-50°N, 70-10°W. At present, the index is calculated by weighing the SST component as 60% of the index and the SLP component as the remaining 40%. All values are standardized using the 1981-2010 climatological average as a baseline. Real-time monthly values are calculated from the NCEP/NCAR Reanalysis and are typically updated by the 5th of the following month.

Standardized monthly values of the Klotzbach and Gray (2008) AMO index from 1950-present

All columns are sortable - click ()

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1950	-0.06	-0.12	0.09	0	0.94	0.59	0.65	0.16	-0.52	-0.35	0.32	-0.15
1951	-0.04	-0.06	0.71	0.74	1.03	1.8	0.92	0.16	0.7	0.13	0.04	-0.2
1952	-0.45	0.6	1.31	0.32	1.43	1.36	0.81	1.26	0.83	1.09	1.21	1.35
1953	0.98	0.96	0.73	1.65	1.93	0.45	0.19	0.05	0.32	-0.13	-0.42	0.14
1954	0.13	0.25	0.69	-0.4	0.87	0.47	0.42	0.83	-0.34	0.16	-0.04	-0.09
1955	1.29	0.77	1.12	1.17	1.12	1.18	0.82	0.6	-0.13	0.57	1.73	1.3
1956	1.29	1.13	1.02	1.39	-0.05	-0.48	0.39	0.1	0.22	-0.2	0.15	-0.03
1957	-0.2	0.48	1.33	0.43	0.84	1.06	0.98	0.36	0.92	0.23	0.42	-0.28
1958	0.69	1.4	1.68	0.67	0.71	1.4	1.4	1.21	1.11	-0.1	0.24	0.6
1959	0.83	0.18	0.19	0.56	0.9	0.53	-0.31	0.84	0.48	-0.03	-0.36	-0.11
1960	0.58	0.92	0.73	0.5	1.11	0.33	0.57	0.7	-0.2	0.88	0.45	-0.34
1961	-0.21	-0.13	0.24	1.34	0.33	-0.29	0.28	-0.23	-0.06	-0.59	0.38	0.94
1962	-0.33	-0.35	1.19	0.12	0.67	0.15	0.38	-0.38	-0.06	-0.06	-0.03	0.28
1963	0.76	0.75	0.45	1.53	-0.72	0.51	0.52	-0.38	-1.02	-0.24	0.25	0.17
1964	0.52	1.27	0.82	-0.37	0.57	0.85	-0.26	0.14	-0.31	-0.73	0.11	0.06
1965	0.47	0.8	1.02	0.57	1.13	0.26	-0.05	0.21	-0.2	0.16	-0.13	0.36
1966	1.52	1.6	0.79	1.55	-0.02	0.1	-0.07	0.71	0.68	0.82	-0.13	0.37
1967	0.67	0.62	-0.01	0.43	-0.21	-0.58	-0.67	-0.83	-0.43	-0.88	-0.44	-0.08
1968	-0.16	0.76	-0.25	0.2	-0.02	-0.1	-0.61	-0.24	-0.4	0.32	0.78	0.18
1969	0.71	0.98	1.08	-0.17	0.29	0.13	-0.63	-0.53	-1.07	-0.28	-0.59	-0.44
1970	0.95	-0.47	0.29	0.28	-0.38	-0.94	-0.88	-0.4	-0.34	-0.58	-0.41	-0.2
1971	0.55	-0.17	0.09	0.2	-0.19	-0.14	-0.11	-0.67	-0.43	-0.54	-0.62	-0.53
1972	-0.39	-0.58	-0.61	-0.45	-1.18	-1.62	-1.32	-1.23	-0.68	-0.79	-0.8	-1.1
1973	-0.94	-1.29	-0.69	-0.03	-0.46	-0.65	-0.89	-0.7	-0.57	-0.22	-0.04	-0.68
1974	-0.67	-0.56	-0.61	-1.05	-0.52	-0.36	-1.13	-1.05	-1.35	-1.64	-0.69	-1.04
1975	-0.92	-0.56	-0.63	-0.41	-0.04	-0.17	0.31	-0.09	-1.03	-0.62	-0.94	-0.48
1976	-0.54	-0.34	-0.58	-0.5	-0.98	-0.73	-0.86	-0.96	-0.53	-0.53	-0.92	-0.76
1977	-0.09	-0.08	0	-0.34	0.27	0.08	0.06	-0.2	-0.36	-0.47	-0.67	0
1978	-0.55	1.18	-0.01	0.47	-0.42	-1.18	0.02	-0.67	-0.38	-0.57	-1.03	0.5
1979	0.35	0.87	-0.33	0.17	0.29	-0.13	-0.9	-0.12	-0.28	0.04	-0.43	-0.3
1980	0.23	0.21	-0.04	0.11	1.11	-0.26	0.07	0.26	-0.93	-0.47	0.56	-0.27
1981	-0.23	-0.23	1.03	0.03	0.19	0.69	-0.1	-0.05	0.24	-0.72	0.14	0.72
1982	0.59	-0.11	-0.88	-0.66	-0.77	0.01	-0.53	-1.11	-1.34	-1.12	-1.75	-1.91
1983	-1.82	-0.92	-1.05	-0.99	-0.93	-0.65	-0.21	-1.13	-0.73	-1.54	0.13	-0.41
1984	-1.43	-1.42	-0.96	-0.29	-1	-0.97	0.18	-0.14	-0.11	-1.28	-0.76	-1.48
1985	-0.62	-0.76	-0.83	-0.7	-0.62	-0.67	-1	-1.39	-0.52	-0.89	-0.33	-0.4
1986	-1.18	-0.33	-1.51	-1.21	-1.06	-1.46	-1.26	-0.7	-0.03	-0.88	-2.07	-2.01
1987	-0.44	-0.29	-0.66	-0.73	-0.76	0.04	0.77	1.28	0.25	-1.06	-0.85	0.38
1988	-0.63	-0.65	-0.38	0.65	-0.13	-0.13	-0.87	-0.35	-0.35	-0.23	0.52	0.09
1989	-0.55	-1.18	-1.23	-1.35	-1.33	-0.51	-0.82	-0.1	-0.61	-0.75	-0.57	0.6
1990	-1.35	-1.29	-1.86	-2.05	-0.2	-1.14	-0.88	-1.25	-0.95	-0.47	-0.1	-0.73
1991	-1.6	-1.51	-0.46	-1.23	-0.99	-0.25	0.13	-1.02	-0.97	-1.16	-1.07	-0.87
1992	-0.36	-0.93	-1.19	-1	-1.2	-0.69	-0.54	-2.16	-2.04	-0.92	-1.06	-1.33
1993	-1.59	-1.6	-1.48	-1.18	-0.52	-0.68	-0.57	-0.96	-0.46	-0.41	-1.02	-1.56
1994	-1.59	-1.36	-1.46	-1.85	-1.09	-1.58	-1.72	-1.27	-0.84	0.55	0.22	-0.97
1995	-1.22	-1.33	-1.66	-0.56	0.39	0.46	1.33	1.07	-0.22	0.25	0.24	0.75
1996	0.81	-0.44	-0.38	0.43	0.28	-0.54	-1.07	-0.53	0.95	0.27	-0.33	0.42
1997	0.72	-0.48	-0.48	1.03	0.64	1.17	0.59	0.28	1.05	2.07	1.95	1.75
1998	0.45	0.46	0.05	0.3	0.22	0.82	0.86	0.7	1.77	0.76	0.43	0.14
1999	-0.47	-0.28	-0.09	0.12	0.09	-0.76	0.19	0.89	0.65	-0.21	-0.05	-0.19
2000	-0.36	-1.11	-0.05	-0.26	-0.28	-1.06	0.43	0.33	0.9	-0.79	0.27	0.31
2001	0.13	-0.08	0.66	-0.34	0.11	0.68	0.53	0.22	1.17	0.72	0.43	1.27
2002	0.75	-0.03	-0.4	-0.76	-0.89	-1.24	-1.46	-0.4	0.54	0.99	0.21	0.83
2003	0.55	-0.03	-0.12	0.13	-0.46	0.33	-0.35	0.07	0.53	1.22	1.13	0.84
2004	1.32	0.71	0.14	-0.09	-0.75	-0.35	-0.11	0.1	0.09	0.8	0.74	0.48
2005	-0.04	0.06	1.37	0.51	0.88	1.65	0.71	1.05	0.77	0.99	0.34	1
2006	0.72	0.77	1.01	0.43	0.71	0.02	0.34	1.21	1.8	1.97	1.14	0.05
2007	0.32	0.95	-0.14	0.65	-0.14	0.82	1.56	0.81	1.07	1.21	1.11	0.65
2008	0.08	-0.09	-0.3	0.2	1.22	1.07	0.69	1.43	0.34	-0.16	-0.15	0.06
2009	0.15	0.13	-0.02	-0.58	-1.31	0.17	0.58	0.06	-0.81	0.96	0.19	0.59
2010	0.53	1.69	0.65	1.08	1.34	1.3	1.17	1.7	2.61	1.97	1.81	2.33
2011	1.76	1.02	0.23	-0.25	-0.81	-0.59	-0.39	0.54	0.2	0.2	0.28	-1.04
2012	-0.81	-0.59	-0.65	-0.26	-0.07	1.5	1.96	1.67	0.99	1.69	0.58	0.67
2013	0.44	0.21	1.3	0.1	-1.09	-1.1	-0.26	0.28	0.44	1.55	0.3	-0.19
2014	-0.3	-0.55	-1.12	-0.94	-1.08	0.08	-0.26	1.15	0.67	0.56	-0.1	-1.2
2015	-1.56	-1.47	-1.88	-1.81	-2.24	-2.37	-0.76	-0.87	-0.26	-0.22	-0.57	-1.39
2016	-0.86	-1.72	-1.74	-1.64	-1.43	-0.32	-0.07	0.5	-0.16	0.25	0.17	-0.18
2017	-0.58	0.08	-0.61	-0.81	0.22	0.06	-0.89	0	0.31	0.16	0.39	0.33
2018	-0.61	-1.29	-0.5	-1.33	-2.03	-1.06	-2.01	-1.39	-0.81	-0.21	0.09	-0.2
2019	-0.48	-1.21	-1.87	-1.35	-0.34	-0.34	1.87	1.27	0.66	0.78	0.19	0.31
2020	-0.66	-1.3	-1.9	-0.75	-0.63	-0.85	-0.04	0.79	0.03	-0.42	-1.11	-0.97
2021	-0.14	-0.06	-0.76	0.25	-0.50	-1.17	-0.19	0.40	0.83	1.00	0.37	0.62
2022	-0.09	-0.81	-0.84	0.19	0.03	-0.07	0.00	0.63	2.03	1.13	0.44	0.20
2023	-0.42	-0.30	0.49	0.26	-0.19	2.09	0.77	1.38	1.72	1.85	0.62	0.13
2024	0.39	0.27	-0.13	0.01	0.58	0.28	0.40	0.09	0.67	1.20

Download Table (.csv)

Remembering Dr. Bill Gray

In Memory of Dr. William (Bill) Gray

Phil Klotzbach (left) and Bill Gray (right) in January 2014

Dr. Gray passed away on April 16, 2016. He spent over 60 years in the field of meteorology and made vast contributions in the field of tropical cyclone research. Not only was he a phenomenal scientist, he was an excellent advisor to his 80+ graduate students, an amazing mentor and a great friend.

If you want to read more about Dr. Gray:

A formal obituary for Dr. Gray published in the Bulletin of the American Meteorological Society.

A paper on Dr. Gray’s research legacy published in the Bulletin of the American Meteorological Society.

Dr. Gray’s first peer-reviewed journal article in 1962 published in the Quarterly Journal of the Royal Meteorological Society.

Dr. Gray's classic paper on genesis in 1979 entitled "Hurricanes: their formation, structure and likely role in the tropical circulation" as part of the book of Meteorology Over the Tropical Oceans.

A eulogy for Dr. Gray written by Phil Klotzbach

‘A Lighter Shade of Gray’, A piece on the unique and humorous characteristics of Dr. Gray published in the Washington Post’s Capital Weather Gang written by Phil Klotzbach and fellow CSU alum Brian McNoldy.

Tropical Meteorology Project Blue Books - Project Reports by Dr. William Gray and his students

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

1996

1995

1994

1993

1992

1991

1990

1989

1988

1987

1986

1985

1984

CSU seasonal hurricane forecast (released in early April, June and August) against the observed value each year

The number of Named Storms in each Atlantic hurricane season

The number of Named Storm Days in each Atlantic hurricane season

The number of Hurricanes in each Atlantic hurricane season

The number of Hurricanes Days in each Atlantic hurricane season

The number of Major Hurricanes in each Atlantic hurricane season

The number of Major Hurricanes Days in each Atlantic hurricane season

Accumulated Cyclone Energy index (in 104 knots2) in each Atlantic hurricane season

Historical Tropical Cyclone Statistics over each basin

North Atlantic Ocean Historical TC statistics

Eastern North Pacific Ocean Historical TC statistics

Western North Pacific Ocean Historical TC statistics

North Indian Ocean Historical TC statistics

South Indian Ocean Historical TC statistics

South Pacific Ocean Historical TC statistics

Northern Hemispheric Ocean Historical TC statistics

Southern Hemispheric Ocean Historical TC statistics

Global Historical TC statistics

Standardized monthly values of the Klotzbach and Gray (2008) AMO index from 1950-present

Animation: Monthly Atlantic TC Genesis Locations 1851-2019

CSU seasonal hurricane forecast (released in early April, June and August)
against the observed value each year

Accumulated Cyclone Energy index (in 10⁴ knots²) in each Atlantic hurricane season