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

The Atlantic Hurricane activity in August was above normal by all metrics including six named storms, three of which became hurricanes, and two of those became major hurricanes. The season through August has also been above normal.

The two major hurricanes in the North Atlantic were Grace and Ida. Grace made landfall on the Yucatan as a category-1 hurricane and then intensified in the Bay of Campeche before making a second landfall over mainland Mexico as a category-3 major hurricane. Hurricane Ida was rapidly intensifying to a category-4 hurricane as it made landfall in Louisiana. Ida continued to cause heavy rain and flooding from the Gulf Coast to the Northeast. Tropical Storm Fred and Hurricane Henri also cause significant inland flooding over the U.S.

The East Pacific was near normal with seven named storms, three of which became hurricanes, including Major Hurricane Linda. Linda's remnants caused heavy rainfall over Hawaii. Hurricane Nora made landfall in western Mexico where it caused heavy rain and mudslides.

The West Pacific had just 4 Tropical Storms and no typhoons in August. The ACE was the lowest since at least 1981. The season through August has also been quieter than normal.

Globally, the number of named storms was above normal both for August and for January-August 2021. However, the accumulated cyclone energy (ACE), an integrated metric of the strength, frequency, and duration of tropical storms, has been below normal due in large part to the lack of activity in the West Pacific.

North Atlantic

August 2021 North Atlantic Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
FredTSAugust 11Aug 11-1765 mph993 mb
Grace3August 14Aug 14-21125 mph962 mb
Henri1August 16Aug 16-2275 mph986 mb
JulianTSAugust 24Aug 24-2960 mph995 mb
Ida4August 26Aug 26-30150 mph929 mb
KateTSAugust 30Aug 30-3145 mph1004 mb
North Atlantic Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1851-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
63.86th8
(1995, 2004, 2012)
Hurricane
Winds >74 mph (64 kts)
31.85th
(tied with 6 other Augusts)
5
(1893, 1995, 2004)
Major Hurricane
Winds >111 mph (96 kts)
20.9
(9 in 10 Augusts)
2nd
(tied with 3 other Augusts)
3
(1886, 1893, 2004)
Accumulated Cyclone Energy
ACE×104 kt2
30.026.814th120.3
(1893)
North Atlantic Tropical Cyclone Season Counts January-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1851-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
116.55th
(tied with 1 other season)
13
(2020)
Hurricane
Winds >74 mph (64 kts)
42.46th
(tied with 4 other seasons)
7
(1886, 1893)
Major Hurricane
Winds >111 mph (96 kts)
21.03rd
(tied with 5 other seasons)
3
(6 seasons)
Accumulated Cyclone Energy
ACE×104 kt2
42.636.512th136.2
(1893)

East Pacific

August 2021 East Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Hilda1July 30-August 5Jul 30-Aug 585 mph985 mb
IgnacioTSAugust 2Aug 2-340 mph1004 mb
JimenaTSAugust 5Aug 5-640 mph1005 mb
KevinTSAugust 7Aug 7-1260 mph999 mb
Linda4August 10Aug 10-20130 mph950 mb
MartyTSAugust 23Aug 23-2445 mph1002 mb
Nora1August 26Aug 26-3085 mph977 mb
East Pacific Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1949-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
84.62nd
(tied with 1 other August)
10
(1968)
Hurricane
Winds >74 mph (64 kts)
32.48th
(tied with 9 other Augusts)
6
(1972, 2014, 2015)
Major Hurricane
Winds >111 mph (96 kts)
11.314th
(tied with 14 other Augusts)
4
(1972, 1993, 2014, 2015)
Accumulated Cyclone Energy
ACE×104 kt2
43.338.012th127.5
(2018)
East Pacific Tropical Cyclone Season Counts January-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1949-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
1510.33rd
(tied with 1 other season)
17
(1985)
Hurricane
Winds >74 mph (64 kts)
55.420th
(tied with 9 other seasons)
10
(1978, 1990, 2015)
Major Hurricane
Winds >111 mph (96 kts)
22.921st
(tied with 10 other seasons)
7
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
79.280.317th171.1
(1978)

West Pacific

August 2021 West Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
LupitTSAugust 4Aug 4-1060 mph976 mb
NidaTSAugust 5Aug 545 mph997 mb
MirinaeTSAugust 6Aug 640 mph992 mb
OmaisTSAugust 13Aug 13-2260 mph994 mb
West Pacific Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1945-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
46.636th
(tied with 3 other Augusts)
11
(1960, 1967, 2018)
Typhoon
Winds >74 mph (64 kts)
04.041st9
(1960, 1962)
Major Typhoon
Winds >111 mph (96 kts)
02.036th
(tied with 5 other Augusts)
4
(5 Augusts)
Accumulated Cyclone Energy
ACE×104 kt2
10.959.041st123.4
(1953)
West Pacific Tropical Cyclone Season Counts January-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1945-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
1314.324th
(tied with 6 other seasons)
25
(2018)
Typhoon
Winds >74 mph (64 kts)
48.237th
(tied with 3 other seasons)
15
(1971)
Major Typhoon
Winds >111 mph (96 kts)
14.339th
(tied with 2 other seasons)
10
(2002)
Accumulated Cyclone Energy
ACE×104 kt2
83.4132.431st315.4
(2015)

North Indian

No North Indian Tropical Cyclones occurred during August 2021.

North Indian Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1972-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.0
(0 in 10 Augusts)
2nd
(tied with 39 other Augusts)
1
(1979, 1983)
Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 40 other Augusts)
0
Major Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 40 other Augusts)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.0
(0 in 10 Augusts)
2nd
(tied with 39 other Augusts)
0.6
(1983)
North Indian Tropical Cyclone Season Counts January-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1972-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
21.912th
(tied with 12 other seasons)
4
(1992, 1996, 2007)
Cyclone
Winds >74 mph (64 kts)
20.8
(8 in 10 seasons)
1st
(tied with 5 other seasons)
2
(7 seasons)
Major Cyclone
Winds >111 mph (96 kts)
10.5
(5 in 10 seasons)
2nd
(tied with 14 other seasons)
2
(2019)
Accumulated Cyclone Energy
ACE×104 kt2
13.99.712th38.0
(2019)

South Indian

No South Indian Tropical Cyclones occurred during August 2021.

South Indian Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.1
(1 in 10 Augusts)
4th
(tied with 38 other Augusts)
1
(1987, 1997, 2001)
Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Major Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.1
(1 in 10 Augusts)
4th
(tied with 38 other Augusts)
2.2
(1997)
South Indian Tropical Cyclone Season Counts July-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.2
(2 in 10 seasons)
8th
(tied with 34 other seasons)
1
(7 seasons)
Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Major Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.3
(3 in 10 seasons)
8th
(tied with 34 other seasons)
2.7
(2017)

Australia

No Australia Tropical Cyclones occurred during August 2021.

Australia Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Tropical Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Major Tropical Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0.0
Australia Tropical Cyclone Season Counts July-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.1
(1 in 10 seasons)
5th
(tied with 37 other seasons)
1
(1990, 1997, 2008, 2015)
Tropical Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Major Tropical Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.1
(1 in 10 seasons)
5th
(tied with 37 other seasons)
1.0
(2016)

Southwest Pacific

No Southwest Pacific Tropical Cyclones occurred during August 2021.

Southwest Pacific Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.0
(0 in 10 Augusts)
2nd
(tied with 40 other Augusts)
1
(2016)
Tropical Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Major Tropical Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 Augusts)
1st
(tied with 41 other Augusts)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.0
(0 in 10 Augusts)
2nd
(tied with 40 other Augusts)
0.8
(2016)
Southwest Pacific Tropical Cyclone Season Counts July-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1956-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
00.1
(1 in 10 seasons)
3rd
(tied with 39 other seasons)
1
(1963, 2015, 2016)
Tropical Cyclone
Winds >74 mph (64 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Major Tropical Cyclone
Winds >111 mph (96 kts)
00.0
(0 in 10 seasons)
1st
(tied with 41 other seasons)
0
Accumulated Cyclone Energy
ACE×104 kt2
0.00.0
(0 in 10 seasons)
2nd
(tied with 40 other seasons)
1.4
(2016)

Global

August 2021 Global Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Hilda1July 30-August 5Jul 30-Aug 585 mph985 mb
IgnacioTSAugust 2Aug 2-340 mph1004 mb
LupitTSAugust 4Aug 4-1060 mph976 mb
JimenaTSAugust 5Aug 5-640 mph1005 mb
NidaTSAugust 5Aug 545 mph997 mb
MirinaeTSAugust 6Aug 640 mph992 mb
KevinTSAugust 7Aug 7-1260 mph999 mb
Linda4August 10Aug 10-20130 mph950 mb
FredTSAugust 11Aug 11-1765 mph993 mb
OmaisTSAugust 13Aug 13-2260 mph994 mb
Grace3August 14Aug 14-21125 mph962 mb
Henri1August 16Aug 16-2275 mph986 mb
MartyTSAugust 23Aug 23-2445 mph1002 mb
JulianTSAugust 24Aug 24-2960 mph995 mb
Nora1August 26Aug 26-3085 mph977 mb
Ida4August 26Aug 26-30150 mph929 mb
KateTSAugust 30Aug 30-3145 mph1004 mb
Global Tropical Cyclone August Counts
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1972-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
1714.811th
(tied with 1 other August)
21
(2004)
Tropical Cyclone
Winds >74 mph (64 kts)
68.028th
(tied with 6 other Augusts)
13
(1990)
Major Tropical Cyclone
Winds >111 mph (96 kts)
34.021st
(tied with 11 other Augusts)
8
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
84.1124.030th215.5
(2015)
Global Tropical Cyclone Season Counts January-August 2021
Storm Type Count 1991-2020
Mean
1981-2021
Rank*
1972-2021
Record
Tropical Storm
Winds >39 mph (34 kts)
6052.46th
(tied with 1 other season)
65
(1989)
Tropical Cyclone
Winds >74 mph (64 kts)
2327.532nd
(tied with 3 other seasons)
37
(1997)
Major Tropical Cyclone
Winds >111 mph (96 kts)
1014.432nd
(tied with 4 other seasons)
25
(2015)
Accumulated Cyclone Energy
ACE×104 kt2
353.9424.927th686.5
(2015)

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: Monthly Tropical Cyclones Report for August 2021, published online September 2021, retrieved on July 4, 2022 from https://www.ncei.noaa.gov/access/monitoring/monthly-report/tropical-cyclones/202108.

Metadata

https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00775