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

Three named storms occurred across the globe in April, which was below the 1991-2020 average of 4.1. Two of these storms reached major tropical cyclone strength (≥111 mph)—both in the Australian region. The global accumulated cyclone energy (ACE: an integrated metric of the strength, frequency, and duration of tropical storms) was below its 1991-2020 average in April.

The first Northern Hemisphere named storm of 2023 was Tropical Storm Sanvu in the West Pacific. Sanvu was a named storm for less than two days. The activity in the West Pacific for both April and January-April were below average. The lack of activity in the other Northern Hemisphere basins has been normal.

The Australian region produced two major cyclones in April: Herman and Ilsa. Herman remained far from land in the southeastern Indian Ocean. However, Ilsa's landfall set a record for the strongest winds observed in western Australia. According to the Australian Bureau of Meteorology, ten-minute sustained winds of 118 kt were observed on Bedout Island—the same location as the previous record holder: 105 kt from Cyclone George in 2007. Fortunately, Ilsa made landfall in a sparsely populated portion of northwestern Australia, which limited its impacts.

No storms were active in either the South Indian Ocean or the Southwest Pacific in April. This lack of activity is below the 1991-2020 averages but is also not uncommon. Since 1981 (43 years), 10 Aprils had no storms in the South Indian Ocean and 19 Aprils had none in the Southwest Pacific.

North Atlantic

No North Atlantic Tropical Cyclones occurred during April 2023.

North Atlantic Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1851-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.1
(1 in 10 Aprils)
4th
(tied with 39 other Aprils)
1
(1992, 2003, 2017)
Hurricane
Winds ≥ 74 mph (64 kts)
00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
0
Major Hurricane
Winds ≥ 111 mph (96 kts)
00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
0
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.00.2
(2 in 10 Aprils)
4th
(tied with 39 other Aprils)
3.2
(2003)
North Atlantic Tropical Cyclone April Counts
North Atlantic Tropical Cyclone Season Counts January-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1851-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.2
(2 in 10 seasons)
6th
(tied with 37 other seasons)
1
(11 seasons)
Hurricane
Winds ≥ 74 mph (64 kts)
00.0
(0 in 10 seasons)
2nd
(tied with 41 other seasons)
1
(1908, 1938, 1955, 2016)
Major Hurricane
Winds ≥ 111 mph (96 kts)
00.0
(0 in 10 seasons)
1st
(tied with 42 other seasons)
0
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.00.5
(5 in 10 seasons)
6th
(tied with 37 other seasons)
6.5
(1955)
North Atlantic Tropical Cyclone Storm Tracks January-April 2023

East Pacific

No East Pacific Tropical Cyclones occurred during April 2023.

East Pacific Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1949-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
1
(1980)
Hurricane
Winds ≥ 74 mph (64 kts)
00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
0
Major Hurricane
Winds ≥ 111 mph (96 kts)
00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
0
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.00.0
(0 in 10 Aprils)
1st
(tied with 42 other Aprils)
0.7
(1980)
East Pacific Tropical Cyclone April Counts
East Pacific Tropical Cyclone Season Counts January-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1949-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.1
(1 in 10 seasons)
4th
(tied with 39 other seasons)
2
(1992)
Hurricane
Winds ≥ 74 mph (64 kts)
00.1
(1 in 10 seasons)
3rd
(tied with 40 other seasons)
1
(1992, 2016)
Major Hurricane
Winds ≥ 111 mph (96 kts)
00.0
(0 in 10 seasons)
2nd
(tied with 41 other seasons)
1
(1992)
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.00.8
(8 in 10 seasons)
4th
(tied with 39 other seasons)
13.9
(1992)
East Pacific Tropical Cyclone Storm Tracks January-April 2023

West Pacific

April 2023 West Pacific Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Sanvu Storm Track
TSApril 20Apr 20-2150 mph999 mb
West Pacific Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1945-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
10.7
(7 in 10 Aprils)
7th
(tied with 18 other Aprils)
3
(1956, 1971, 1999)
Typhoon
Winds ≥ 74 mph (64 kts)
00.4
(4 in 10 Aprils)
16th
(tied with 27 other Aprils)
2
(1951, 1956, 1971, 1999)
Major Typhoon
Winds ≥ 111 mph (96 kts)
00.3
(3 in 10 Aprils)
12th
(tied with 31 other Aprils)
1
(21 Aprils)
Accumulated Cyclone Energy
ACE×10⁴ kt²
1.27.419th46.9
(1997)
West Pacific Tropical Cyclone April Counts
West Pacific Tropical Cyclone Season Counts January-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1945-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
11.723rd
(tied with 12 other seasons)
6
(1965)
Typhoon
Winds ≥ 74 mph (64 kts)
00.7
(7 in 10 seasons)
26th
(tied with 17 other seasons)
3
(5 seasons)
Major Typhoon
Winds ≥ 111 mph (96 kts)
00.4
(4 in 10 seasons)
19th
(tied with 24 other seasons)
2
(1953, 1956, 1957, 2015)
Accumulated Cyclone Energy
ACE×10⁴ kt²
1.213.232nd62.3
(1956)
West Pacific Tropical Cyclone Storm Tracks January-April 2023

North Indian

No North Indian Tropical Cyclones occurred during April 2023.

North Indian Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1972-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.2
(2 in 10 Aprils)
8th
(tied with 35 other Aprils)
1
(7 Aprils)
Cyclone
Winds ≥ 74 mph (64 kts)
00.2
(2 in 10 Aprils)
6th
(tied with 37 other Aprils)
1
(5 Aprils)
Major Cyclone
Winds ≥ 111 mph (96 kts)
00.1
(1 in 10 Aprils)
4th
(tied with 39 other Aprils)
1
(1991, 2006, 2019)
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.01.58th
(tied with 35 other Aprils)
17.6
(1991)
North Indian Tropical Cyclone April Counts
North Indian Tropical Cyclone Season Counts January-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1972-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.5
(5 in 10 seasons)
14th
(tied with 29 other seasons)
2
(1991, 1994, 2006, 2019)
Cyclone
Winds ≥ 74 mph (64 kts)
00.2
(2 in 10 seasons)
6th
(tied with 37 other seasons)
1
(5 seasons)
Major Cyclone
Winds ≥ 111 mph (96 kts)
00.1
(1 in 10 seasons)
4th
(tied with 39 other seasons)
1
(1991, 2006, 2019)
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.01.714th
(tied with 29 other seasons)
18.4
(1991)
North Indian Tropical Cyclone Storm Tracks January-April 2023

South Indian

No South Indian Tropical Cyclones occurred during April 2023.

South Indian Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
01.133rd
(tied with 10 other Aprils)
3
(1981, 2019)
Cyclone
Winds ≥ 74 mph (64 kts)
00.8
(8 in 10 Aprils)
26th
(tied with 17 other Aprils)
2
(1996, 2015, 2018, 2019)
Major Cyclone
Winds ≥ 111 mph (96 kts)
00.4
(4 in 10 Aprils)
18th
(tied with 25 other Aprils)
1
(17 Aprils)
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.011.933rd
(tied with 10 other Aprils)
52.5
(2016)
South Indian Tropical Cyclone April Counts
South Indian Tropical Cyclone Season Counts July 2022-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
810.131st
(tied with 6 other seasons)
15
(1997)
Cyclone
Winds ≥ 74 mph (64 kts)
65.915th
(tied with 8 other seasons)
11
(2019)
Major Cyclone
Winds ≥ 111 mph (96 kts)
33.518th
(tied with 10 other seasons)
9
(2019)
Accumulated Cyclone Energy
ACE×10⁴ kt²
119.993.28th186.9
(1994)
South Indian Tropical Cyclone Storm Tracks July 2022-April 2023

Australia

April 2023 Australia Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Herman Storm Track
4March 29-April 2Mar 29-Apr 2145 mph932 mb
Ilsa Storm Track
4April 8Apr 8-13145 mph929 mb
Value occurred in March
Australia Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
21.67th
(tied with 18 other Aprils)
4
(2000)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
20.9
(9 in 10 Aprils)
1st
(tied with 11 other Aprils)
2
(13 Aprils)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
20.5
(5 in 10 Aprils)
1st
(tied with 5 other Aprils)
2
(6 Aprils)
Accumulated Cyclone Energy
ACE×10⁴ kt²
16.910.59th38.9
(2000)
Australia Tropical Cyclone April Counts
Australia Tropical Cyclone Season Counts July 2022-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
910.327th
(tied with 1 other season)
19
(1999)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
54.813th
(tied with 7 other seasons)
9
(1992, 1996)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
42.45th
(tied with 4 other seasons)
6
(2015)
Accumulated Cyclone Energy
ACE×10⁴ kt²
66.458.712th111.3
(1999)
Australia Tropical Cyclone Storm Tracks July 2022-April 2023

Southwest Pacific

No Southwest Pacific Tropical Cyclones occurred during April 2023.

Southwest Pacific Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
00.7
(7 in 10 Aprils)
24th
(tied with 19 other Aprils)
3
(1983, 1998)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
00.3
(3 in 10 Aprils)
13th
(tied with 30 other Aprils)
3
(1983)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
00.1
(1 in 10 Aprils)
5th
(tied with 38 other Aprils)
1
(1983, 1989, 1998, 2020)
Accumulated Cyclone Energy
ACE×10⁴ kt²
0.02.924th
(tied with 19 other Aprils)
30.9
(2020)
Southwest Pacific Tropical Cyclone April Counts
Southwest Pacific Tropical Cyclone Season Counts July 2022-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1956-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
66.717th
(tied with 8 other seasons)
16
(1998)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
33.619th
(tied with 7 other seasons)
10
(1998)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
11.919th
(tied with 14 other seasons)
6
(2003)
Accumulated Cyclone Energy
ACE×10⁴ kt²
25.348.727th128.5
(1998)
Southwest Pacific Tropical Cyclone Storm Tracks July 2022-April 2023

Global

April 2023 Global Tropical Cyclones
Name Maximum
Category
Max
Cat
Dates
>39 mph
Maximum Sustained Winds Minimum Central Pressure
Herman Storm Track
4March 29-April 2Mar 29-Apr 2145 mph932 mb
Ilsa Storm Track
4April 8Apr 8-13145 mph929 mb
Sanvu Storm Track
TSApril 20Apr 20-2150 mph999 mb
Value occurred in March
Global Tropical Cyclone April Counts
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1972-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
34.126th
(tied with 9 other Aprils)
7
(1989, 2000, 2017)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
22.318th
(tied with 12 other Aprils)
5
(1989)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
21.36th
(tied with 8 other Aprils)
5
(1989)
Accumulated Cyclone Energy
ACE×10⁴ kt²
18.234.532nd80.0
(1989)
Global Tropical Cyclone April Counts
Global Tropical Cyclone Season Counts January-April 2023
Storm Type Count 1991-2020
Mean
1981-2023
Rank*
1972-2023
Record
Tropical Storm
Winds ≥ 39 mph (34 kts)
1321.442nd30
(1986)
Tropical Cyclone
Winds ≥ 74 mph (64 kts)
911.635th
(tied with 4 other seasons)
18
(1994)
Major Tropical Cyclone
Winds ≥ 111 mph (96 kts)
46.532nd
(tied with 4 other seasons)
12
(2019)
Accumulated Cyclone Energy
ACE×10⁴ kt²
166.4179.021st306.4
(1994)
Global Tropical Cyclone Storm Tracks January-April 2023

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 basins 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, Monthly Tropical Cyclones Report for April 2023, published online May 2023, retrieved on March 4, 2024 from https://www.ncei.noaa.gov/access/monitoring/monthly-report/tropical-cyclones/202304.