Tropical Cyclones - Annual 2020

Note: This report catalogs recent tropical cyclones across the North Atlantic and East Pacific and places each basin’s tropical cyclone activity in a climate-scale context. It is not updated in real time. Users seeking the real time status and forecasts of tropical cyclones should visit The National Hurricane Center.

Summary

A total of 103 named storms occurred during 2020 around the globe. This count includes Tropical Cyclone Calvinia, which formed in late December 2019 and continued through January 1. The count ties the record that was set in 2018. Despite the record number of named storms, the 45 hurricane-strength and 21 major hurricane-strength tropical cyclones were both near their 1981-2010 mean values. The accumulated cyclone energy (ACE), which measures the strength and duration of tropical storms and hurricanes, was 25% below normal and the fifth lowest since 1981.

The North Atlantic played an unusually large role in the global tropical cyclone activity in 2020. The North Atlantic had 30 named storms, which broke the previous record of 28 in 2005. Of those 30 storms, 13 were hurricanes, six of which were major hurricanes. Both of these totals are the second highest on record behind 2005. The ACE was 75% above normal. The ACE was the sixth highest since 1981, and 2020 marked the fifth consecutive year with above-normal ACE. The North Atlantic accounted for about 30% of the global ACE and named storms, which is more than twice its usual share.

The 2020 season was also particularly impactful for the U.S. Twelve named storms made landfall in the contiguous U.S., which breaks the previous record of nine from 1916. Six of the landfalling storms in 2020 were hurricanes, which ties 1886 and 1985 for the highest on record. Seven of the twelve U.S. landfalling named storms caused at least $1 billion, which broke the previous record of four billion-dollar tropical cyclones in both 2004 and 2005. The strongest of these U.S. landfalling storms was Hurricane Laura, which made landfall in Louisiana as a category-4 storm. Laura was just the third of five named storms to make landfall in Louisiana in 2020, the most on record for any state in one year.

The strongest storm of the 2020 North Atlantic season was Hurricane Iota, which was also the second-strongest November hurricane on record for the Atlantic. Iota carved a path of destruction through Central America that closely followed that of category-4 Hurricane Eta from just two weeks earlier.

Despite the record activity in the North Atlantic, most other basins were less active than normal in 2020. The East Pacific had 16 named storms, which was near normal. However, the four East Pacific hurricanes in 2020 were the third fewest since 1981. The East Pacific ACE was more than 40% below normal, and it was the eighth lowest value since 1981. The West Pacific was also unusually quiet with less than half its normal ACE (third lowest since 1981). The West Pacific did have the strongest storm of 2020, Super Typhoon Goni, which made landfall in the Philippines as a powerful category-5 storm. The initial estimates of 195-mph winds during its landfall would be the strongest on record.

The North Indian Ocean tropical cyclone activity was stronger than normal with two particularly noteworthy storms. Super Cyclonic Storm Amphan was a rare category-5 strength storm for the North Indian Ocean. It weakened to a category 2 before landfall over low-lying eastern India. Its destruction extended into Bangladesh and its likely the costliest North Indian Ocean storm on record. The other noteworthy storm was Very Severe Cyclonic Storm Gati, which was the first hurricane-strength storm on record to make landfall in Somalia.

The tropical cyclone seasons in the Southern Hemisphere begin in July and end in June, so the seasons summarized here are the 2019/20 seasons that ended in June 2020. It is also more common for storms to cross basins in the Southern Hemisphere, so some storms are counted in multiple basins. The numbers of named storms, cyclones, and major cyclones in the South Indian Ocean were each near their 1981-2010 mean, but the ACE was 40% below normal. The Australian region was below normal in all metrics with ACE less than half of the climatological mean. The Southwest Pacific activity was near-to-above normal. The strongest cyclone of the Southern Hemisphere season was category-5 Tropical Cyclone Harold. Harold alone accounted for more than half of the Southwest Pacific's ACE for 2020. It was the first category 5 storm in the Southern Hemisphere since Tropical Cyclone Gita in 2018. Harold caused widespread damage throughout the South Pacific Islands, particularly in Vanuatu where it achieved its peak intensity.

North Atlantic

2020 North Atlantic Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
ArthurTSMay 17May 17-1960 mph990 mb
BerthaTSMay 27May 2750 mph1007 mb
Amanda:CristobalTSMay 31-June 8May 31-Jun 860 mph992 mb
DollyTSJune 23Jun 23-2445 mph1002 mb
EdouardTSJuly 6Jul 645 mph1005 mb
FayTSJuly 9Jul 9-1160 mph998 mb
GonzaloTSJuly 22Jul 22-2565 mph997 mb
Hanna1July 24Jul 24-2685 mph973 mb
Isaias1July 30-August 4Jul 30-Aug 485 mph987 mb
JosephineTSAugust 13Aug 13-1645 mph1005 mb
KyleTSAugust 14Aug 14-1650 mph1000 mb
Laura4August 21Aug 21-28150 mph938 mb
Marco1August 22Aug 22-2575 mph991 mb
Nana1September 1Sep 1-375 mph994 mb
OmarTSSeptember 2Sep 240 mph1003 mb
Paulette2September 7Sep 7-22105 mph965 mb
ReneTSSeptember 7Sep 7-1250 mph1000 mb
Sally2September 12Sep 12-17105 mph967 mb
Teddy4September 14Sep 14-23140 mph945 mb
VickyTSSeptember 14Sep 14-1750 mph1000 mb
WilfredTSSeptember 18Sep 18-2040 mph1007 mb
AlphaTSSeptember 18Sep 1850 mph998 mb
BetaTSSeptember 18Sep 18-2260 mph994 mb
GammaTSOctober 3Oct 3-570 mph980 mb
Delta4October 5Oct 5-10140 mph953 mb
Epsilon3October 19Oct 19-26115 mph952 mb
Zeta2October 25Oct 25-29105 mph973 mb
Eta4November 1Nov 1-13150 mph923 mb
ThetaTSNovember 10Nov 10-1570 mph989 mb
Iota5November 13Nov 13-18160 mph917 mb
North Atlantic Tropical Cyclone Season Counts January-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1851-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
3012.11st30
(2020)
Hurricane
Winds >74 mph (64 kts)
136.42nd15
(2005)
Major Hurricane
Winds >111 mph (96 kts)
62.72nd
(tied with 3 other seasons)
7
(2005)
Accumulated Cyclone Energy
ACE×104 kt2
180.2105.66th258.6
(1933)
Previous record 28 (2005)

East Pacific

2020 East Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Amanda:CristobalTSMay 31-June 8May 31-Jun 860 mph992 mb
BorisTSJune 25Jun 25-2640 mph1005 mb
CristinaTSJuly 7Jul 7-1270 mph993 mb
Douglas4July 20Jul 20-29130 mph954 mb
Elida2August 9Aug 9-12100 mph975 mb
Genevieve4August 16Aug 16-21130 mph950 mb
FaustoTSAugust 16Aug 1640 mph1004 mb
HernanTSAugust 26Aug 26-2845 mph1001 mb
IselleTSAugust 26Aug 26-3060 mph997 mb
JulioTSSeptember 5Sep 5-645 mph1004 mb
KarinaTSSeptember 13Sep 13-1660 mph996 mb
LowellTSSeptember 21Sep 21-2550 mph999 mb
Marie4September 29-October 6Sep 29-Oct 6130 mph948 mb
NorbertTSOctober 6Oct 6-1450 mph1001 mb
OdalysTSNovember 3Nov 3-550 mph1000 mb
PoloTSNovember 18Nov 18-1945 mph1004 mb
Value occurred in the North Atlantic
East Pacific Tropical Cyclone Season Counts January-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1949-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
1616.924th
(tied with 2 other seasons)
27
(1992)
Hurricane
Winds >74 mph (64 kts)
48.938th
(tied with 1 other season)
16
(1990, 1992, 2014, 2015)
Major Hurricane
Winds >111 mph (96 kts)
34.325th
(tied with 4 other seasons)
11
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
76.7132.133rd318.1
(2018)

West Pacific

2020 West Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Vongfong3May 12May 12-16120 mph957 mb
NuriTSJune 13Jun 1340 mph997 mb
SinlakuTSAugust 1Aug 1-240 mph993 mb
Hagupit1August 2Aug 2-485 mph971 mb
JangmiTSAugust 9Aug 9-1145 mph990 mb
Not_NamedTSAugust 9Aug 9-1050 mph1005 mb
Mekkhala1August 10Aug 10-1180 mph980 mb
HigosTSAugust 18Aug 18-1960 mph991 mb
Bavi3August 22Aug 22-27115 mph942 mb
Maysak4August 28-September 3Aug 28-Sep 3145 mph921 mb
Haishen4August 31-September 7Aug 31-Sep 7155 mph915 mb
NoulTSSeptember 15Sep 15-1860 mph990 mb
DolphinTSSeptember 20Sep 20-2470 mph980 mb
Kujira1September 27Sep 27-3075 mph974 mb
Chan-Hom1October 5Oct 5-1190 mph962 mb
LinfaTSOctober 10Oct 10-1145 mph999 mb
NangkaTSOctober 12Oct 12-1460 mph989 mb
Saudel2October 20Oct 20-2595 mph968 mb
Molave3October 24Oct 24-28125 mph950 mb
Goni5October 28-November 5Oct 28-Nov 5195 mph884 mb
AtsaniTSNovember 2Nov 2-760 mph993 mb
EtauTSNovember 9Nov 945 mph998 mb
Vamco4November 10Nov 10-15130 mph945 mb
West Pacific Tropical Cyclone Season Counts January-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1945-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
2326.832nd
(tied with 1 other season)
38
(1964)
Typhoon
Winds >74 mph (64 kts)
1217.034th
(tied with 2 other seasons)
26
(1964)
Major Typhoon
Winds >111 mph (96 kts)
79.029th
(tied with 4 other seasons)
16
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
150.0307.338th570.4
(1997)

North Indian

2020 North Indian Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Amphan5May 16May 16-21165 mph901 mb
Nisarga1June 2Jun 2-385 mph975 mb
Gati3November 21Nov 21-23115 mph967 mb
Nivar1November 23Nov 23-2680 mph981 mb
BureviTSDecember 1Dec 1-450 mph999 mb
North Indian Tropical Cyclone Season Counts January-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1972-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
55.014th
(tied with 12 other seasons)
11
(1992)
Cyclone
Winds >74 mph (64 kts)
41.63rd
(tied with 3 other seasons)
6
(2019)
Major Cyclone
Winds >111 mph (96 kts)
20.7
(7 in 10 seasons)
3rd
(tied with 5 other seasons)
3
(1999, 2019)
Accumulated Cyclone Energy
ACE×104 kt2
26.619.112th86.7
(2019)

South Indian

2020 South Indian Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Belna3December 5Dec 5-11115 mph959 mb
Ambali4December 5Dec 5-8155 mph929 mb
Calvinia1December 29-January 1Dec 29-Jan 180 mph973 mb
Not_NamedTSJanuary 22Jan 22-2340 mph1000 mb
DianeTSJanuary 25Jan 25-2760 mph985 mb
EsamiTSJanuary 25Jan 25-2650 mph991 mb
FranciscoTSFebruary 4Feb 4-650 mph994 mb
FranciscoTSFebruary 14Feb 1445 mph1003 mb
Gabekile1February 15Feb 15-1885 mph978 mb
Herold3March 13Mar 13-19115 mph963 mb
Irondro2April 2Apr 2-6105 mph958 mb
JerutoTSApril 14Apr 14-1545 mph999 mb
South Indian Tropical Cyclone Season Counts July 2019-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1956-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
1110.511th
(tied with 9 other seasons)
16
(1997)
Cyclone
Winds >74 mph (64 kts)
66.016th
(tied with 8 other seasons)
11
(2019)
Major Cyclone
Winds >111 mph (96 kts)
33.016th
(tied with 10 other seasons)
9
(2019)
Accumulated Cyclone Energy
ACE×104 kt2
53.692.731st186.9
(1994)

Australia

2020 Australia Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
BlakeTSJanuary 5Jan 5-860 mph989 mb
Claudia2January 11Jan 11-1695 mph971 mb
Damien2February 6Feb 6-9105 mph961 mb
Uesi1February 9Feb 9-1585 mph971 mb
Ferdinand2February 23Feb 23-29105 mph962 mb
EstherTSFebruary 23Feb 23-2860 mph992 mb
Not_NamedTSMarch 11Mar 1140 mph1003 mb
Irondro2April 2Apr 2-6105 mph**958 mb**
Harold5April 2Apr 2-10165 mph††912 mb††
ManggaTSMay 21May 21-2345 mph996 mb
Value occurred in the Southwest Pacific
**Value occurred in the South Indian
††Value occurred in the Southwest Pacific
Australia Tropical Cyclone Season Counts July 2019-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1956-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
1011.324th
(tied with 2 other seasons)
19
(1999)
Tropical Cyclone
Winds >74 mph (64 kts)
34.927th
(tied with 10 other seasons)
9
(1992, 1996)
Major Tropical Cyclone
Winds >111 mph (96 kts)
02.235th
(tied with 5 other seasons)
6
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
30.762.434th111.3
(1999)

Southwest Pacific

2020 Southwest Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Rita1November 24Nov 24-2675 mph983 mb
Sarai1December 26Dec 26-3180 mph975 mb
Tino1January 16Jan 16-1980 mph964 mb
Not_NamedTSJanuary 25Jan 25-2640 mph1000 mb
Uesi1February 9Feb 9-1585 mph971 mb
VickyTSFebruary 21Feb 21-2250 mph996 mb
WasiTSFebruary 21Feb 21-2360 mph995 mb
GretelTSMarch 14Mar 14-1660 mph971 mb
Harold5April 2Apr 2-10165 mph912 mb
Southwest Pacific Tropical Cyclone Season Counts July 2019-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1956-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
97.512th
(tied with 1 other season)
17
(1998)
Tropical Cyclone
Winds >74 mph (64 kts)
54.19th
(tied with 5 other seasons)
11
(1998)
Major Tropical Cyclone
Winds >111 mph (96 kts)
11.919th
(tied with 13 other seasons)
6
(2003)
Accumulated Cyclone Energy
ACE×104 kt2
56.050.813th139.9
(1998)

Global

2020 Global Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Calvinia1December 29-January 1Dec 29-Jan 180 mph973 mb
BlakeTSJanuary 5Jan 5-860 mph989 mb
Claudia2January 11Jan 11-1695 mph971 mb
Tino1January 16Jan 16-1980 mph964 mb
Not_NamedTSJanuary 22Jan 22-2340 mph1000 mb
DianeTSJanuary 25Jan 25-2760 mph985 mb
EsamiTSJanuary 25Jan 25-2650 mph991 mb
Not_NamedTSJanuary 25Jan 25-2640 mph1000 mb
FranciscoTSFebruary 4Feb 4-650 mph994 mb
Damien2February 6Feb 6-9105 mph961 mb
Uesi1February 9Feb 9-1585 mph971 mb
FranciscoTSFebruary 14Feb 1445 mph1003 mb
Gabekile1February 15Feb 15-1885 mph978 mb
VickyTSFebruary 21Feb 21-2250 mph996 mb
WasiTSFebruary 21Feb 21-2360 mph995 mb
Ferdinand2February 23Feb 23-29105 mph962 mb
EstherTSFebruary 23Feb 23-2860 mph992 mb
Not_NamedTSMarch 11Mar 1140 mph1003 mb
Herold3March 13Mar 13-19115 mph963 mb
GretelTSMarch 14Mar 14-1660 mph971 mb
Irondro2April 2Apr 2-6105 mph958 mb
Harold5April 2Apr 2-10165 mph912 mb
JerutoTSApril 14Apr 14-1545 mph999 mb
Vongfong3May 12May 12-16120 mph957 mb
Amphan5May 16May 16-21165 mph901 mb
ArthurTSMay 17May 17-1960 mph990 mb
ManggaTSMay 21May 21-2345 mph996 mb
BerthaTSMay 27May 2750 mph1007 mb
Amanda:CristobalTSMay 31-June 8May 31-Jun 860 mph992 mb
Nisarga1June 2Jun 2-385 mph975 mb
NuriTSJune 13Jun 1340 mph997 mb
DollyTSJune 23Jun 23-2445 mph1002 mb
BorisTSJune 25Jun 25-2640 mph1005 mb
EdouardTSJuly 6Jul 645 mph1005 mb
CristinaTSJuly 7Jul 7-1270 mph993 mb
FayTSJuly 9Jul 9-1160 mph998 mb
Douglas4July 20Jul 20-29130 mph954 mb
GonzaloTSJuly 22Jul 22-2565 mph997 mb
Hanna1July 24Jul 24-2685 mph973 mb
Isaias1July 30-August 4Jul 30-Aug 485 mph987 mb
SinlakuTSAugust 1Aug 1-240 mph993 mb
Hagupit1August 2Aug 2-485 mph971 mb
Elida2August 9Aug 9-12100 mph975 mb
JangmiTSAugust 9Aug 9-1145 mph990 mb
Not_NamedTSAugust 9Aug 9-1050 mph1005 mb
Mekkhala1August 10Aug 10-1180 mph980 mb
JosephineTSAugust 13Aug 13-1645 mph1005 mb
KyleTSAugust 14Aug 14-1650 mph1000 mb
Genevieve4August 16Aug 16-21130 mph950 mb
FaustoTSAugust 16Aug 1640 mph1004 mb
HigosTSAugust 18Aug 18-1960 mph991 mb
Laura4August 21Aug 21-28150 mph938 mb
Marco1August 22Aug 22-2575 mph991 mb
Bavi3August 22Aug 22-27115 mph942 mb
HernanTSAugust 26Aug 26-2845 mph1001 mb
IselleTSAugust 26Aug 26-3060 mph997 mb
Maysak4August 28-September 3Aug 28-Sep 3145 mph921 mb
Haishen4August 31-September 7Aug 31-Sep 7155 mph915 mb
Nana1September 1Sep 1-375 mph994 mb
OmarTSSeptember 2Sep 240 mph1003 mb
JulioTSSeptember 5Sep 5-645 mph1004 mb
Paulette2September 7Sep 7-22105 mph965 mb
ReneTSSeptember 7Sep 7-1250 mph1000 mb
Sally2September 12Sep 12-17105 mph967 mb
KarinaTSSeptember 13Sep 13-1660 mph996 mb
Teddy4September 14Sep 14-23140 mph945 mb
VickyTSSeptember 14Sep 14-1750 mph1000 mb
NoulTSSeptember 15Sep 15-1860 mph990 mb
WilfredTSSeptember 18Sep 18-2040 mph1007 mb
AlphaTSSeptember 18Sep 1850 mph998 mb
BetaTSSeptember 18Sep 18-2260 mph994 mb
DolphinTSSeptember 20Sep 20-2470 mph980 mb
LowellTSSeptember 21Sep 21-2550 mph999 mb
Kujira1September 27Sep 27-3075 mph974 mb
Marie4September 29-October 6Sep 29-Oct 6130 mph948 mb
GammaTSOctober 3Oct 3-570 mph980 mb
Delta4October 5Oct 5-10140 mph953 mb
Chan-Hom1October 5Oct 5-1190 mph962 mb
NorbertTSOctober 6Oct 6-1450 mph1001 mb
LinfaTSOctober 10Oct 10-1145 mph999 mb
NangkaTSOctober 12Oct 12-1460 mph989 mb
Epsilon3October 19Oct 19-26115 mph952 mb
Saudel2October 20Oct 20-2595 mph968 mb
Molave3October 24Oct 24-28125 mph950 mb
Zeta2October 25Oct 25-29105 mph973 mb
Goni5October 28-November 5Oct 28-Nov 5195 mph884 mb
Eta4November 1Nov 1-13150 mph923 mb
AtsaniTSNovember 2Nov 2-760 mph993 mb
OdalysTSNovember 3Nov 3-550 mph1000 mb
EtauTSNovember 9Nov 945 mph998 mb
ThetaTSNovember 10Nov 10-1570 mph989 mb
Vamco4November 10Nov 10-15130 mph945 mb
Iota5November 13Nov 13-18160 mph917 mb
Alicia1November 14Nov 14-1775 mph983 mb
PoloTSNovember 18Nov 18-1945 mph1004 mb
Gati3November 21Nov 21-23115 mph967 mb
Nivar1November 23Nov 23-2680 mph981 mb
BureviTSDecember 1Dec 1-450 mph999 mb
BongoyoTSDecember 7Dec 7-1160 mph992 mb
Not_NamedTSDecember 8Dec 8-1150 mph992 mb
Not_NamedTSDecember 11Dec 11-1245 mph997 mb
Yasa5December 12Dec 12-19160 mph914 mb
ZazuTSDecember 13Dec 13-1660 mph985 mb
ChalaneTSDecember 25Dec 25-3070 mph990 mb
Global Tropical Cyclone Season Counts January-December 2020
Storm Type Count 1981-2010
Mean
1981-2020
Rank*
1972-2020
Record
Tropical Storm
Winds >39 mph (34 kts)
10386.81st
(tied with 1 other season)
103
(2018, 2020)
Tropical Cyclone
Winds >74 mph (64 kts)
4547.526th
(tied with 2 other seasons)
59
(1990, 1992, 2018)
Major Tropical Cyclone
Winds >111 mph (96 kts)
2123.425th
(tied with 7 other seasons)
39
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
579.9770.236th1,163.1
(1992)

Data Description

The data in this report are derived from NCEI's IBTrACS dataset (Knapp et al. 2010; Schreck et al. 2014). IBTrACS tropical cyclone track and intensity data from agencies and sources around the globe. In this report, data from NOAA's National Hurricane Center (NHC) are used for the North Atlantic and East Pacific. The other basin's use data from the U.S. Military's Joint Typhoon Warning Center (JTWC).

Historical values use the "best track" data that have been analyzed by forecasters after the season using all available data. Operational procedures and observing systems have changed with time and between regions, which makes these data heterogeneous. Intensity data are generally the most reliable since the early 1970s in the Atlantic (Landsea and Franklin 2013) and since the mid-1980s in other regions (Chu et al. 2002). The number of short-lived storms (≤2 days) has also increased since around 2000 due to improvements in observations and analysis techniques (Landsea et al. 2010).

Values for the current year are provisional values from the operational forecast advisories. IBTrACS obtains these from NCEP's TC Vitals, the NCAR Tropical Cyclone Guidance Project, and NHC provisional data. These values are subject to change during the post-season best track analysis. They also only include 6-hourly storm fixes, which means they may miss special advisories at landfall, peak intensity, etc.

The tropical cyclone seasons in the Southern Hemisphere begin in July and end in June, while the Northern Hemisphere seasons are counted from January to December. Storms are counted in all basins, months, and years in which they occur, which means some storms may appear more than once. However, the global totals only include each storm one time.

References

  • Chu, J.-H., C. R. Sampson, A. S. Levine, and E. Fukada, 2002: The joint typhoon warning center tropical cyclone best-tracks, 1945–2000. Naval Research Laboratory, Reference Number NRL/MR/7540-02-16, 22 pp., https://www.metoc.navy.mil/jtwc/products/best-tracks/tc-bt-report.html.
  • Knapp, K. R., M. C. Kruk, D. H. Levinson, H. J. Diamond, and C. J. Neumann, 2010: The International Best Track Archive for Climate Stewardship (IBTrACS). Bull. Amer. Meteor. Soc., 91, 363–376, https://doi.org/10.1175/2009BAMS2755.1.
  • Landsea, C. W., and J. L. Franklin, 2013: Atlantic Hurricane database uncertainty and presentation of a new database format. Mon. Wea. Rev., 141, 3576–3592, https://doi.org/10.1175/MWR-D-12-00254.1.
  • ——, G. A. Vecchi, L. Bengtsson, and T. R. Knutson, 2010: Impact of duration thresholds on Atlantic tropical cyclone counts. J. Climate, 23, 2508–2519, https://doi.org/10.1175/2009JCLI3034.1.
  • Schreck, C. J., K. R. Knapp, and J. P. Kossin, 2014: The Impact of Best Track Discrepancies on Global Tropical Cyclone Climatologies using IBTrACS. Mon. Wea. Rev., 142, 3881–3899, https://doi.org/10.1175/MWR-D-14-00021.1.

Citing This Report

NOAA National Centers for Environmental Information, State of the Climate: Tropical Cyclones for Annual 2020, published online January 2021, retrieved on February 28, 2021 from https://www.ncdc.noaa.gov/sotc/tropical-cyclones/202013.

Metadata