Talk:2024 Atlantic hurricane season/ACE calcs

This is the page for calculating the Accumulated cyclone energy for the 2024 Atlantic hurricane season. If any storms of a season happen to cross years, the storm's ACE counts for the previous year.^[1]

The ACE is calculated by summing the squares of the estimated maximum sustained velocity of every active tropical storm (wind speed 35 knots or higher), at six-hour intervals. The numbers are divided by 10,000 to make them more manageable. The unit of ACE is 10⁴ kt², and for use as an index the unit is assumed. Thus,

{\text{ACE}}=\sum _{}^{}{\frac {{v_{\mathrm {max} }}^{2}}{10^{4}}},

where v_max is estimated sustained wind speed in knots.

Operational (Advisories)

01L.Alberto

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	17 June	4 pm CDT	35	Potential
2	17 June	10 pm CDT	35	Potential
3	18 June	4 am CDT	35	Potential
4	18 June	10 am CDT	35	Potential
5	18 June	4 pm CDT	35	Potential
6	18 June	10 pm CDT	35	Potential
7	19 June	4 am CDT	35	Potential
8	19 June	10 am CDT	35	0.1225
9	19 June	4 pm CDT	35	0.1225
10	19 June	10 pm CDT	45	0.2025
11	20 June	4 am CDT	45	0.2025
12	20 June	10 am CDT	30	0
13	20 June	4 pm CDT	25	0
Total				0.65

02L.Beryl

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	28 June	5 pm AST	30	0
2	28 June	11 pm AST	35	0.1225
3	29 June	5 am AST	45	0.2025
4	29 June	11 am AST	55	0.3025
5	29 June	5 pm AST	65	0.4225
6	29 June	11 pm AST	75	0.5625
7	30 June	5 am AST	85	0.7225
8	30 June	11 am AST	105	1.1025
9	30 June	5 pm AST	115	1.3225
10	30 June	11 pm AST	115	1.3225
11	1 July	5 am AST	105	1.1025
12	1 July	11 am AST	120	1.4400
13	1 July	5 pm AST	130	1.6900
14	1 July	11 pm AST	140	1.9600
15	2 July	5 am AST	145	2.1025
16	2 July	11 am AST	140	1.9600
17	2 July	5 pm EDT	135	1.8225
18	2 July	11 pm EDT	130	1.6900
19	3 July	5 am EDT	125	1.5625
20	3 July	11 am EDT	125	1.5625
21	3 July	5 pm EDT	120	1.4400
22	3 July	11 pm EDT	115	1.3225
23	4 July	5 am EDT	105	1.1025
24	4 July	11 am EDT	100	1.0000
25	4 July	5 pm EDT	95	0.9025
26	4 July	10 pm CDT	100	1.0000
27	5 July	4 am CDT	95	0.9025
28	5 July	10 am CDT	75	0.5625
29	5 July	4 pm CDT	55	0.3025
30	5 July	10 pm CDT	50	0.2500
31	6 July	4 am CDT	50	0.2500
32	6 July	10 am CDT	50	0.2500
33	6 July	4 pm CDT	50	0.2500
34	6 July	10 pm CDT	50	0.2500
35	7 July	4 am CDT	50	0.2500
36	7 July	10 am CDT	55	0.3025
37	7 July	4 pm CDT	55	0.3025
38	7 July	10 pm CDT	60	0.3600
39	8 July	4 am CDT	70	0.4900
40	8 July	10 am CDT	60	0.3600
41	8 July	4 pm CDT	40	0.1600
42	8 July	10 pm CDT	30	0
Total				34.985

03L.Chris

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	30 June	4 pm CDT	30	0
2	30 June	10 pm CDT	35	0.1225
3	1 July	4 am CDT	35	0.1225
4	1 July	10 am CDT	30	Remnants
Total				0.245

04L.Debby

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	2 August	11 am AST	25	Potential TC
2	2 August	5 pm AST	25	Potential TC
3	2 August	11 pm AST	25	0
4	3 August	5 am AST	25	0
5	3 August	11 am AST	30	0
6	3 August	5 pm AST	35	0.1225
7	3 August	11 pm AST	40	0.1600
8	4 August	5 am AST	45	0.2025
9	4 August	11 am AST	55	0.3025
10	4 August	5 pm AST	55	0.3025
11	4 August	11 pm AST	65	0.4225
12	5 August	5 am AST	70	0.4900
13	5 August	11 am AST	60	0.3600
14	5 August	5 pm AST	45	0.2025
15	5 August	11 pm AST	40	0.1600
16	6 August	5 am AST	40	0.1600
17	6 August	11 am AST	35	0.1225
18	6 August	5 pm AST	35	0.1225
19	6 August	11 pm AST	35	0.1225
20	7 August	5 am AST	40	0.1600
21	7 August	11 am AST	50	0.2500
22	7 August	5 pm AST	50	0.2500
23	7 August	11 pm AST	50	0.2500
24	8 August	5 am AST	45	0.2025
25	8 August	11 am AST	35	0.1225
26	8 August	5 pm AST	30	0
Total				4.4875

05L.Ernesto

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	11 August	5 pm AST	25	Potential TC
2	11 August	11 pm AST	25	Potential TC
3	12 August	5 am AST	25	Potential TC
4	12 August	11 am AST	30	Potential TC
5	12 August	5 pm AST	35	0.1225
6	12 August	11 pm AST	35	0.1225
7	13 August	5 am AST	35	0.1225
8	13 August	11 am AST	45	0.2025
9	13 August	5 pm AST	50	0.2500
10	13 August	11 pm AST	55	0.3025
11	14 August	5 am AST	60	0.3600
12	14 August	11 am AST	65	0.4225
13	14 August	5 pm AST	65	0.4225
14	14 August	11 pm AST	70	0.4900
15	15 August	5 am AST	75	0.5625
16	15 August	11 am AST	75	0.5625
17	15 August	5 pm AST	75	0.5625
18	15 August	11 pm AST	85	0.7225
19	16 August	5 am AST	85	0.7225
20	16 August	11 am AST	85	0.7225
21	16 August	5 pm AST	85	0.7225
22	16 August	11 pm AST	80	0.6400
23	17 August	5 am AST	75	0.5625
24	17 August	11 am AST	70	0.4900
25	17 August	5 pm AST	65	0.4225
26	17 August	11 pm AST	60	0.3600
27	18 August	5 am AST	60	0.3600
28	18 August	11 am AST	60	0.3600
29	18 August	5 pm AST	65	0.4225
30	18 August	11 pm AST	70	0.4900
31	19 August	5 am AST	75	0.5625
32	19 August	11 am AST	80	0.6400
33	19 August	5 pm AST	80	0.6400
34	19 August	11 pm AST	70	0.4900
35	20 August	5 am AST	65	0.4225
36	20 August	3 pm GMT	60	Post-Trop.
Total				14.2575

06L.Francine

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	8 September	4 pm CDT	45	Potential TC
2	8 September	10 pm CDT	45	Potential TC
3	9 September	4 am CDT	45	Potential TC
4	9 September	10 am CDT	45	0.2025
5	9 September	4 pm CDT	55	0.3025
6	9 September	10 pm CDT	55	0.3025
7	10 September	4 am CDT	55	0.3025
8	10 September	10 am CDT	55	0.3025
9	10 September	4 pm CDT	55	0.3025
10	10 September	10 pm CDT	65	0.4225
11	11 September	4 am CDT	80	0.6400
12	11 September	10 am CDT	80	0.6400
13	11 September	4 pm CDT	85	0.7225
13A	11 September	5 pm CDT	85	Special
14	11 September	10 pm CDT	60	0.3600
15	12 September	4 am CDT	40	0.16
16	12 September	10 am CDT	30	0
17	12 September	4 pm CDT	25	Post-Trop.
Total				4.66

07L.Gordon

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	11 September	2 pm CVT	30	0
2	11 September	5 pm AST	30	0
3	11 September	11 pm AST	30	0
4	12 September	5 am AST	30	0
5	12 September	11 am AST	30	0
6	12 September	5 pm AST	30	0
7	12 September	11 pm AST	30	0
8	13 September	5 am AST	30	0
9	13 September	11 am AST	35	0.1225
10	13 September	5 pm AST	35	0.1225
11	13 September	11 pm AST	40	0.1600
12	14 September	5 am AST	40	0.1600
13	14 September	11 am AST	40	0.1600
14	14 September	5 pm AST	40	0.1600
15	14 September	11 pm AST	35	0.1225
16	15 September	5 am AST	35	0.1225
17	15 September	11 am AST	35	0.1225
18	15 September	5 pm AST	30	0
19	15 September	11 pm AST	25	0
20	16 September	5 am AST	25	0
21	16 September	11 am AST	30	0
22	16 September	5 pm AST	30	0
23	16 September	11 pm AST	30	0
24	17 September	5 am AST	30	0
25	17 September	11 am AST	25	Remnants
Total				1.2525

09L.Helene

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	23 September	11 am EDT	25	Potential TC
2	23 September	5 pm EDT	30	Potential TC
3	23 September	11 pm EDT	30	Potential TC
4	24 September	5 am EDT	30	Potential TC
5	24 September	11 am EDT	40	0.1600
6	24 September	5 pm EDT	45	0.2025
7	24 September	10 pm CDT	50	0.2500
8	25 September	4 am CDT	55	0.3025
9	25 September	10 am CDT	70	0.4900
10	25 September	4 pm CDT	75	0.5625
11	25 September	10 pm CDT	75	0.5625
12	26 September	4 am CDT	80	0.6400
13	26 September	10 am CDT	90	0.8100
14	26 September	5 pm EDT	110	1.2100
15	26 September	11 pm EDT	120	1.4400
16	27 September	5 am EDT	60	0.3600
17	27 September	11 am EDT	40	0.1600
18	27 September	5 pm EDT	30	Post-Tropical
Total				7.15

10L.Isaac

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	25 September	11 pm AST	45	0.2025
2	26 September	5 am AST	45	0.2025
3	26 September	11 am AST	45	0.2025
4	26 September	5 pm AST	45	0.2025
5	26 September	11 pm AST	55	0.3025
6	27 September	5 am AST	65	0.4225
7	27 September	11 am AST	65	0.4225
8	27 September	5 pm AST	75	0.5625
9	28 September	3 am GMT	80	0.6400
10	28 September	9 am GMT	90	0.8100
11	28 September	3 pm GMT	90	0.8100
12	28 September	9 pm GMT	85	0.7225
13	29 September	3 am GMT	70	0.4900
14	29 September	9 am GMT	70	0.4900
15	29 September	3 pm GMT	65	0.4225
16	29 September	9 pm GMT	60	0.3600
17	30 September	3 am GMT	55	0.3025
18	30 September	9 am GMT	55	0.3025
19	30 September	3 pm GMT	50	Post-Tropical
Total				7.87

11L.Joyce

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	27 September	11 am AST	35	0.1225
2	27 September	5 pm AST	45	0.2025
3	27 September	11 pm AST	45	0.2025
4	28 September	5 am AST	45	0.2025
5	28 September	11 am AST	45	0.2025
6	28 September	5 pm AST	40	0.1600
7	28 September	11 pm AST	40	0.1600
8	29 September	5 am AST	40	0.1600
9	29 September	11 am AST	40	0.1600
10	29 September	5 pm AST	35	0.1225
11	29 September	11 pm AST	30	0
12	30 September	5 am AST	30	0
13	30 September	11 am AST	30	0
14	30 September	5 pm AST	30	0
15	30 September	11 pm AST	30	Remnants
Total				1.695

12L.Kirk

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	29 September	5 pm AST	30	0
2	29 September	11 pm AST	30	0
3	30 September	5 am AST	30	0
4	30 September	11 am AST	45	0.2025
5	30 September	5 pm AST	50	0.2500
6	30 September	11 pm AST	50	0.2500
7	1 October	5 am AST	50	0.2500
8	1 October	11 am AST	60	0.3600
9	1 October	5 pm AST	65	0.4225
10	1 October	11 pm AST	65	0.4225
11	2 October	5 am AST	70	0.4900
12	2 October	11 am AST	75	0.5625
13	2 October	5 pm AST	80	0.6400
14	2 October	8 pm AST	105	Special
15	2 October	11 pm AST	110	1.2100
16	3 October	5 am AST	105	1.1025
17	3 October	11 am AST	110	1.2100
18	3 October	5 pm AST	115	1.3225
19	3 October	11 pm AST	125	1.5625
20	4 October	5 am AST	125	1.5625
21	4 October	11 am AST	120	1.4400
22	4 October	5 pm AST	115	1.3225
23	4 October	11 pm AST	115	1.3225
24	5 October	5 am AST	110	1.2100
25	5 October	11 am AST	105	1.1025
26	5 October	5 pm AST	105	1.1025
27	5 October	11 pm AST	100	1.000
28	6 October	5 am AST	90	0.8100
29	6 October	11 am AST	85	0.7225
30	6 October	5 pm AST	75	0.5625
31	7 October	3 am GMT	70	0.4900
32	7 October	9 am GMT	65	0.4225
33	7 October	3 pm GMT	65	Post-Trop.
Total				23.3275

13L.Leslie

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	2 October	2 pm CVT	30	0
2	2 October	8 pm CVT	30	0
3	2 October	11 pm AST	35	0.1225
4	3 October	5 am AST	35	0.1225
5	3 October	11 am AST	40	0.1600
6	3 October	5 pm AST	45	0.2025
7	3 October	11 pm AST	45	0.2025
8	4 October	5 am AST	50	0.2500
9	4 October	11 am AST	55	0.3025
10	4 October	5 pm AST	60	0.3600
11	4 October	11 pm AST	65	0.4225
12	5 October	5 am AST	70	0.4900
13	5 October	11 am AST	70	0.4900
14	5 October	5 pm AST	70	0.4900
15	5 October	11 pm AST	70	0.4900
16	6 October	5 am AST	75	0.5625
17	6 October	11 am AST	80	0.6400
18	6 October	5 pm AST	80	0.6400
19	6 October	11 pm AST	80	0.6400
20	7 October	5 am AST	80	0.6400
21	7 October	11 am AST	75	0.5625
22	7 October	5 pm AST	70	0.4900
23	7 October	11 pm AST	65	0.4225
24	8 October	5 am AST	60	0.3600
25	8 October	11 am AST	60	0.3600
26	8 October	5 pm AST	65	0.4225
27	8 October	11 pm AST	70	0.4900
28	9 October	5 am AST	70	0.4900
29	9 October	11 am AST	75	0.5625
30	9 October	5 pm AST	80	0.6400
31	9 October	11 pm AST	90	0.8100
32	10 October	5 am AST	90	0.8100
33	10 October	11 am AST	80	0.6400
34	10 October	5 pm AST	60	0.3600
35	10 October	11 pm AST	55	0.3025
36	11 October	5 am AST	50	0.2500
37	11 October	11 am AST	45	0.2025
38	11 October	5 pm AST	45	0.2025
39	11 October	11 pm AST	45	0.2025
40	12 October	5 am AST	45	0.2025
41	12 October	3 pm GMT	45	Remnants
Total				16.01

14L.Milton

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	5 October	10 am CDT	30	0
2	5 October	4 pm CDT	35	0.1225
3	5 October	10 pm CDT	40	0.1600
4	6 October	4 am CDT	45	0.2025
5	6 October	10 am CDT	55	0.3025
5A	6 October	1 pm CDT	70	Special
6	6 October	4 pm CDT	75	0.5625
7	6 October	10 pm CDT	80	0.6400
8	7 October	4 am CDT	85	0.7225
9	7 October	7 am CDT	110	Special
10	7 October	10 am CDT	135	1.8225
11	7 October	4 pm CDT	155	2.4025
12	7 October	10 pm CDT	145	2.1025
13	8 October	4 am CDT	135	1.8225
14	8 October	10 am CDT	130	1.6900
15	8 October	4 pm CDT	145	2.1025
16	8 October	10 pm CDT	140	1.9600
17	9 October	4 am CDT	140	1.9600
18	9 October	11 am EDT	125	1.5625
19	9 October	5 pm EDT	105	1.1025
20	9 October	11 pm EDT	90	0.8100
21	10 October	5 am EDT	75	0.5625
22	10 October	11 am EDT	70	0.4900
23	10 October	5 pm EDT	75	Post-Trop.
Total				23.1025

Best Track (Tropical Cyclone Reports)

01L.Alberto

Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
19 June	1200 UTC	35	0.1225
19 June	1800 UTC	40	0.1600
20 June	0000 UTC	45	0.2025
20 June	0600 UTC	45	0.2025
20 June	0300 UTC	45	Special
20 June	1200 UTC	35	0.1225
20 June	1800 UTC	N/A	Dissipated
Total			0.81

03L.Chris

Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
30 June	1800 UTC	30	0
01 July	0000 UTC	35	0.1225
01 July	0300 UTC	40	Special
01 July	0600 UTC	30	0
01 July	1200 UTC	N/A	Dissipated
Total			0.1225

Totals

Storm	Type	ACE (10⁴ kt²)
01L (Alberto)	Best track	0.8100
02L (Beryl)	Operational	34.9850
03L (Chris)	Best track	0.1225
04L (Debby)	Operational	4.4875
05L (Ernesto)	Operational	14.2575
06L (Francine)	Operational	4.6600
07L (Gordon)	Operational	1.2525
09L (Helene)	Operational	7.1500
10L (Isaac)	Operational	7.8700
11L (Joyce)	Operational	1.6950
12L (Kirk)	Operational	23.3275
13L (Leslie)	Operational	16.0100
14L (Milton)	Operational	23.1025
Total		139.73

References

^ Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved May 17, 2020.

[1] Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved May 17, 2020.

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