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This is the page for calculating the Accumulated Cyclone Energy for the 2015 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.

where vmax is estimated sustained wind speed in knots.

Operational (Advisories)

[edit]
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 7 May 11 pm EDT 40 0.1600
2 8 May 5 am EDT 40 0.1600
3 8 May 11 am EDT 40 0.1600
4 8 May 5 pm EDT 40 0.1600
5 8 May 11 pm EDT 50 0.2500
6 9 May 5 am EDT 50 0.2500
7 9 May 11 am EDT 50 0.2500
8 9 May 5 pm EDT 50 0.2500
9 9 May 11 pm EDT 50 0.2500
10 10 May 5 am EDT 40 0.1600
11 10 May 11 am EDT 35 0.1225
12 10 May 5 pm EDT 30 0
Total       2.1725
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 15 June 10 pm CDT 45 0.2025
2 16 June 4 am CDT 45 0.2025
3 16 June 10 am CDT 50 0.2500
4 16 June 4 pm CDT 45 0.2025
5 16 June 10 pm CDT 35 0.1225
6 17 June 4 am CDT 30 0
7 17 June 10 am CDT 30 0
8 17 June 4 pm CDT 25 0
9 17 June 10 pm CDT 25 0
10 18 June 4 am CDT 20 0
11 18 June 10 am CDT 20 0
12 18 June 4 pm CDT 15 0
13 18 June 10 pm CDT 15 0
14 19 June 4 am CDT 15 0
15 19 June 10 am CDT 20 0
16 19 June 4 pm CDT 20 0
17 19 June 10 pm CDT 15 0
18 20 June 4 am CDT 15 0
19 20 June 10 am CDT 15 0
20 20 June 4 pm CDT 15 Post-trop.
Total       0.98
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 13 July 1 pm AST 45 Special
2 13 July 5 pm AST 45 0.2025
3 13 July 11 pm AST 45 0.2025
4 14 July 5 am AST 40 0.1600
5 14 July 11 am AST 35 0.1225
6 14 July 5 pm AST 40 0.1600
7 14 July 11 pm AST 40 Post-trop.
Total       0.8475
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 18 August 11 am AST 30 0
2 18 August 5 pm AST 35 0.1225
3 18 August 11 pm AST 45 0.2025
4 19 August 5 am AST 45 0.2025
5 19 August 11 am AST 45 0.2025
6 19 August 5 pm AST 45 0.2025
7 19 August 11 pm AST 45 0.2025
8 20 August 5 am AST 45 0.2025
9 20 August 11 am AST 65 0.4225
10 20 August 5 pm AST 70 0.4900
11 20 August 11 pm AST 70 0.4900
12 21 August 5 am AST 75 0.5625
13 21 August 11 am AST 90 0.8100
14 21 August 5 pm AST 100 1.0000
15 21 August 11 pm AST 95 0.9025
16 22 August 5 am AST 85 0.7225
17 22 August 11 am AST 80 0.6400
18 22 August 5 pm AST 65 0.4225
19 22 August 11 pm AST 50 0.2500
20 23 August 5 am AST 45 0.2025
21 23 August 11 am AST 45 0.2025
22 23 August 5 pm AST 35 0.1225
23 23 August 11 pm AST 35 0.1225
24 24 August 5 am AST 35 0.1225
25 24 August 11 am AST 25 Dissipated
Total       8.8225
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 24 August 11 pm AST 40 0.1600
2 25 August 5 am AST 40 0.1600
3 25 August 11 am AST 40 0.1600
4 25 August 5 pm AST 35 0.1225
5 25 August 11 pm AST 35 0.1225
6 26 August 5 am AST 35 0.1225
7 26 August 11 am AST 40 0.1600
8 26 August 5 pm AST 40 0.1600
9 26 August 11 pm AST 40 0.1600
10 27 August 5 am AST 45 0.2025
11 27 August 11 am AST 45 0.2025
12 27 August 5 pm AST 40 0.1600
13 27 August 11 pm AST 40 0.1600
14 28 August 5 am AST 45 0.2025
15 28 August 11 am AST 45 0.2025
16 28 August 5 pm AST 45 0.2025
17 28 August 11 pm AST 40 0.1600
18 29 August 5 am AST 35 0.1225
19 29 August 11 am AST 30 Dissipated
Total       2.9425
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 30 August 1:30 am AST 30 Special
2 30 August 5 am AST 35 0.1225
3 30 August 11 am AST 45 0.2025
4 30 August 5 pm AST 55 0.3025
5 30 August 11 pm AST 60 0.3600
6 31 August 5 am AST 70 0.4900
7 31 August 11 am AST 75 0.5625
8 31 August 5 pm AST 70 0.4900
9 31 August 11 pm AST 60 0.3600
10 1 September 5 am AST 55 0.3025
11 1 September 11 am AST 45 0.2025
12 1 September 5 pm AST 45 0.2025
13 1 September 11 pm AST 45 0.2025
14 2 September 5 am AST 40 0.1600
15 2 September 11 am AST 40 0.1600
16 2 September 5 pm AST 35 0.1225
17 2 September 11 pm AST 35 0.1225
18 3 September 5 am AST 40 0.1600
19 3 September 11 am AST 35 0.1225
20 3 September 5 pm AST 35 0.1225
21 3 September 11 pm AST 35 0.1225
22 4 September 5 am AST 35 0.1225
23 4 September 11 am AST 30 0
24 4 September 5 pm AST 30 0
25 4 September 11 pm AST 35 0.1225
26 5 September 5 am AST 35 0.1225
27 5 September 11 am AST 35 0.1225
28 5 September 5 pm AST 30 0
29 5 September 11 pm AST 30 0
30 6 September 5 am AST 30 0
31 6 September 11 am AST 30 0
Total       5.3825
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 5 September 11 am AST 30 0
2 5 September 5 pm AST 35 0.1225
3 5 September 11 pm AST 35 0.1225
4 6 September 5 am AST 40 0.1600
5 6 September 11 am AST 40 0.1600
6 6 September 5 pm AST 45 0.2025
7 6 September 11 pm AST 45 0.2025
8 7 September 5 am AST 45 0.2025
9 7 September 11 am AST 40 0.1600
10 7 September 5 pm AST 40 0.1600
11 7 September 11 pm AST 35 0.1225
12 8 September 5 am AST 35 0.1225
13 8 September 11 am AST 30 0
Total       1.7375
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 9 September 12:30 am AST 30 Special
2 9 September 5 am AST 30 0
3 9 September 11 am AST 30 0
4 9 September 5 pm AST 30 0
5 9 September 11 pm AST 35 0.1225
6 10 September 5 am AST 35 0.1225
7 10 September 11 am AST 35 0.1225
8 10 September 5 pm AST 35 0.1225
9 10 September 11 pm AST 35 0.1225
10 11 September 5 am AST 35 0.1225
11 11 September 11 am AST 35 0.1225
Total       0.8575
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 18 September 11 am AST 25 0
2 18 September 5 pm AST 30 0
3 18 September 11 pm AST 35 0.1225
4 19 September 5 am AST 35 0.1225
5 19 September 11 am AST 35 0.1225
6 19 September 5 pm AST 35 0.1225
7 19 September 11 pm AST 35 0.1225
8 20 September 5 am AST 35 0.1225
9 20 September 11 am AST 40 0.1600
10 20 September 5 pm AST 40 0.1600
11 20 September 11 pm AST 40 0.1600
12 21 September 5 am AST 45 0.2025
13 21 September 11 am AST 45 0.2025
14 21 September 5 pm AST 45 0.2025
15 21 September 11 pm AST 40 0.1600
16 22 September 5 am AST 40 0.1600
17 22 September 11 am AST 40 0.1600
18 22 September 5 pm AST 40 0.1600
19 22 September 11 pm AST 35 0.1225
20 23 September 5 am AST 35 0.1225
21 23 September 11 am AST 35 0.1225
22 23 September 5 pm AST 35 0.1225
23 23 September 11 pm AST 35 0.1225
24 24 September 5 am AST 35 0.1225
25 24 September 11 am AST 30 0
26 24 September 5 pm AST 30 0
27 24 September 11 pm AST 30 0
28 25 September 5 am AST 30 0
29 25 September 11 am AST 25 0
30 25 September 5 pm AST 25 0
31 25 September 11 pm AST 30 0
32 26 September 5 am AST 30 0
33 26 September 11 am AST 30 0
34 26 September 5 pm AST 30 0
35 26 September 11 pm AST 30 0
36 27 September 5 am AST 25 0
37 27 September 11 am AST 25 0
38 27 September 5 pm AST 25 Low
Total       3.1975
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 27 September 11 pm EDT 30 0
2 28 September 5 am EDT 30 0
3 28 September 11 am EDT 30 0
4 28 September 5 pm EDT 30 0
5 28 September 11 pm EDT 35 0.1225
6 29 September 5 am EDT 35 0.1225
7 29 September 11 am EDT 40 0.1600
8 29 September 5 pm EDT 55 0.3025
9 29 September 11 pm EDT 60 0.3600
10 30 September 5 am EDT 60 0.3600
11 30 September 11 am EDT 70 0.4900
12 30 September 5 pm EDT 75 0.5625
13 30 September 11 pm EDT 100 1.0000
14 1 October 5 am EDT 105 1.1025
15 1 October 11 am EDT 110 1.2100
16 1 October 5 pm EDT 115 1.3225
17 1 October 11 pm EDT 115 1.3225
18 2 October 5 am EDT 115 1.3225
19 2 October 11 am EDT 115 1.3225
20 2 October 5 pm EDT 110 1.2100
21 2 October 11 pm EDT 110 1.2100
22 3 October 5 am EDT 110 1.2100
23 3 October 11 am EDT 115 1.3225
24 3 October 12 pm EDT 135 Special
25 3 October 5 pm EDT 130 1.6900
26 3 October 11 pm EDT 115 1.3225
27 4 October 5 am EDT 105 1.1025
28 4 October 11 am EDT 95 0.9025
29 4 October 5 pm EDT 85 0.7225
30 4 October 11 pm EDT 75 0.5625
31 5 October 5 am EDT 75 0.5625
32 5 October 11 am EDT 75 0.5625
33 5 October 5 pm EDT 75 0.5625
34 5 October 11 pm EDT 75 0.5625
35 6 October 5 am EDT 75 0.5625
36 6 October 11 am EDT 70 0.4900
37 6 October 5 pm EDT 70 0.4900
38 6 October 11 pm EDT 70 0.4900
39 7 October 5 am EDT 65 0.4225
40 7 October 11 am EDT 60 0.3600
41 7 October 5 pm EDT 60 0.3600
Total       27.7625
Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 8 November 10 pm EST 30 0
2 9 November 4 am EST 30 0
3 9 November 10 am EST 40 0.1600
4 9 November 4 pm EST 40 0.1600
5 9 November 10 pm EST 50 0.2500
6 10 November 4 am EST 50 0.2500
7 10 November 10 am EST 60 0.3600
8 10 November 4 pm EST 60 0.3600
9 10 November 11 pm AST 60 0.3600
10 11 November 5 am AST 65 0.4225
11 11 November 11 am AST 65 0.4225
12 11 November 5 am AST 65 0.4225
13 11 November 11 pm AST 60 0.3600
Total       3.5275

Best Track (Tropical Cyclone Reports)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
8 May 0000 UTC 40 0.1600
8 May 0600 UTC 40 0.1600
8 May 1200 UTC 40 0.1600
8 May 1800 UTC 45 0.2025
9 May 0000 UTC 50 0.2500
9 May 0600 UTC 50 0.2500
9 May 1200 UTC 50 0.2500
9 May 1800 UTC 45 0.2025
10 May 0000 UTC 45 0.2025
10 May 0600 UTC 40 0.1600
10 May 1200 UTC 35 0.1225
10 May 1800 UTC 30 0
11 May 0000 UTC 30 0
11 May 0600 UTC 30 0
11 May 1200 UTC 30 0
11 May 1800 UTC 30 0
12 May 0000 UTC 30 Low
Total     2.12
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
16 June 0000 UTC 45 0.2025
16 June 0600 UTC 45 0.2025
16 June 1200 UTC 50 0.2500
16 June 1645 UTC 50 Special
16 June 1800 UTC 50 0.2500
17 June 0000 UTC 40 0.1600
17 June 0600 UTC 30 0
17 June 1200 UTC 30 0
17 June 1800 UTC 25 0
18 June 0000 UTC 25 0
18 June 0600 UTC 25 0
18 June 1200 UTC 20 0
18 June 1800 UTC 15 Low
Total     1.065
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
13 July 0600 UTC 30 0
13 July 1200 UTC 40 0.1600
13 July 1800 UTC 45 0.2025
14 July 0000 UTC 45 0.2025
14 July 0600 UTC 45 0.2025
14 July 1200 UTC 45 0.2025
14 July 1800 UTC 40 0.1600
15 July 0000 UTC 35 Low
Total     1.13
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
18 August 0600 UTC 30 0
18 August 1200 UTC 35 0.1225
18 August 1800 UTC 40 0.1600
19 August 0000 UTC 45 0.2025
19 August 0600 UTC 45 0.2025
19 August 1200 UTC 45 0.2025
19 August 1800 UTC 50 0.2500
20 August 0000 UTC 55 0.3025
20 August 0600 UTC 60 0.3600
20 August 1200 UTC 65 0.4225
20 August 1800 UTC 75 0.5625
21 August 0000 UTC 85 0.7225
21 August 0600 UTC 95 0.9025
21 August 1200 UTC 110 1.2100
21 August 1800 UTC 105 1.1025
22 August 0000 UTC 95 0.9025
22 August 0600 UTC 85 0.7225
22 August 1200 UTC 75 0.5625
22 August 1800 UTC 65 0.4225
23 August 0000 UTC 55 0.3025
23 August 0600 UTC 50 0.2500
23 August 1200 UTC 45 0.2025
23 August 1800 UTC 40 0.1600
24 August 0000 UTC 40 0.1600
24 August 0600 UTC 35 0.1225
24 August 1200 UTC 30 0
Total     10.5325
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
24 August 1800 UTC 40 0.1600
25 August 0000 UTC 40 0.1600
25 August 0600 UTC 40 0.1600
25 August 1200 UTC 40 0.1600
25 August 1800 UTC 35 0.1225
26 August 0000 UTC 35 0.1225
26 August 0600 UTC 35 0.1225
26 August 1200 UTC 40 0.1600
26 August 1800 UTC 40 0.1600
27 August 0000 UTC 40 0.1600
27 August 0600 UTC 45 0.2025
27 August 1200 UTC 45 0.2025
27 August 1800 UTC 45 0.2025
28 August 0000 UTC 45 0.2025
28 August 0600 UTC 45 0.2025
28 August 1200 UTC 45 0.2025
28 August 1800 UTC Dissipated
Total     2.7025
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
30 August 0000 UTC 30 0
30 August 0600 UTC 35 0.1225
30 August 1200 UTC 45 0.2025
30 August 1800 UTC 55 0.3025
31 August 0000 UTC 65 0.4225
31 August 0600 UTC 70 0.4900
31 August 1200 UTC 75 0.5625
31 August 1800 UTC 70 0.4900
1 September 0000 UTC 65 0.4225
1 September 0600 UTC 60 0.3600
1 September 1200 UTC 50 0.2500
1 September 1800 UTC 45 0.2025
2 September 0000 UTC 45 0.2025
2 September 0600 UTC 40 0.1600
2 September 1200 UTC 40 0.1600
2 September 1800 UTC 35 0.1225
3 September 0000 UTC 35 0.1225
3 September 0600 UTC 40 0.1600
3 September 1200 UTC 40 0.1600
3 September 1800 UTC 35 0.1225
4 September 0000 UTC 35 0.1225
4 September 0600 UTC 35 0.1225
4 September 1200 UTC 30 0
4 September 1800 UTC 30 0
5 September 0000 UTC 35 0.1225
5 September 0600 UTC 35 0.1225
5 September 1200 UTC 30 0
5 September 1800 UTC 30 0
6 September 0000 UTC 30 0
6 September 0600 UTC 30 0
6 September 1200 UTC 25 0
Total     5.5275
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
5 September 0600 UTC 25 0
5 September 1200 UTC 30 0
5 September 1800 UTC 35 0.1225
6 September 0000 UTC 40 0.1600
6 September 0600 UTC 45 0.2025
6 September 1200 UTC 50 0.2500
6 September 1800 UTC 45 0.2025
7 September 0000 UTC 45 0.2025
7 September 0600 UTC 45 0.2025
7 September 1200 UTC 40 0.1600
7 September 1800 UTC 40 0.1600
8 September 0000 UTC 35 0.1225
8 September 0600 UTC 35 0.1225
8 September 1200 UTC 30 0
8 September 1800 UTC 30 0
9 September 0000 UTC 25 0
9 September 0600 UTC 25 0
Total     1.9075
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
8 September 1800 UTC 30 0
9 September 0000 UTC 35 0.1225
9 September 0600 UTC 35 0.1225
9 September 1200 UTC 40 0.1600
9 September 1800 UTC 45 0.2025
10 September 0000 UTC 45 0.2025
10 September 0600 UTC 45 0.2025
10 September 1200 UTC 40 0.1600
10 September 1800 UTC 40 0.1600
11 September 0000 UTC 40 0.1600
11 September 0600 UTC 40 0.1600
11 September 1200 UTC Dissipated
Total     1.6525
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
18 September 0600 UTC 25 0
18 September 1200 UTC 25 0
18 September 1800 UTC 30 0
19 September 0000 UTC 35 0.1225
19 September 0600 UTC 35 0.1225
19 September 1200 UTC 35 0.1225
19 September 1800 UTC 35 0.1225
20 September 0000 UTC 40 0.1600
20 September 0600 UTC 40 0.1600
20 September 1200 UTC 40 0.1600
20 September 1800 UTC 40 0.1600
21 September 0000 UTC 40 0.1600
21 September 0600 UTC 45 0.2025
21 September 1200 UTC 45 0.2025
21 September 1800 UTC 45 0.2025
22 September 0000 UTC 40 0.1600
22 September 0600 UTC 40 0.1600
22 September 1200 UTC 40 0.1600
22 September 1800 UTC 40 0.1600
23 September 0000 UTC 35 0.1225
23 September 0600 UTC 35 0.1225
23 September 1200 UTC 35 0.1225
23 September 1800 UTC 35 0.1225
24 September 0000 UTC 35 0.1225
24 September 0600 UTC 30 0
24 September 1200 UTC 30 0
24 September 1800 UTC 30 0
25 September 0000 UTC 30 0
25 September 0600 UTC 30 0
25 September 1200 UTC 30 0
25 September 1800 UTC 30 0
26 September 0000 UTC 30 0
26 September 0600 UTC 30 0
26 September 1200 UTC 30 0
26 September 1800 UTC 30 0
27 September 0000 UTC 30 0
27 September 0600 UTC 25 0
27 September 1200 UTC 25 Low
Total     3.15
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
28 September 0000 UTC 30 0
28 September 0600 UTC 30 0
28 September 1200 UTC 30 0
28 September 1800 UTC 30 0
29 September 0000 UTC 35 0.1225
29 September 0600 UTC 35 0.1225
29 September 1200 UTC 45 0.2025
29 September 1800 UTC 55 0.3025
30 September 0000 UTC 60 0.3600
30 September 0600 UTC 65 0.4225
30 September 1200 UTC 70 0.4900
30 September 1800 UTC 80 0.6400
1 October 0000 UTC 100 1.0000
1 October 0600 UTC 110 1.2100
1 October 1200 UTC 115 1.3225
1 October 1800 UTC 115 1.3225
2 October 0000 UTC 120 1.4400
2 October 0600 UTC 120 1.4400
2 October 1200 UTC 115 1.3225
2 October 1800 UTC 110 1.2100
3 October 0000 UTC 115 1.3225
3 October 0600 UTC 120 1.4400
3 October 1200 UTC 135 1.8225
3 October 1800 UTC 130 1.6900
4 October 0000 UTC 115 1.3225
4 October 0600 UTC 105 1.1025
4 October 1200 UTC 95 0.9025
4 October 1800 UTC 85 0.7225
5 October 0000 UTC 75 0.5625
5 October 0600 UTC 75 0.5625
5 October 1200 UTC 75 0.5625
5 October 1800 UTC 75 0.5625
6 October 0000 UTC 75 0.5625
6 October 0600 UTC 75 0.5625
6 October 1200 UTC 70 0.4900
6 October 1800 UTC 70 0.4900
7 October 0000 UTC 70 0.4900
7 October 0600 UTC 65 0.4225
7 October 1200 UTC 60 0.3600
7 October 1800 UTC 60 0.3600
8 October 0000 UTC 55 Low
Total     29.2425
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
8 November 1800 UTC 30 0
9 November 0000 UTC 30 0
9 November 0600 UTC 35 0.1225
9 November 1200 UTC 40 0.1600
9 November 1800 UTC 45 0.2025
10 November 0000 UTC 50 0.2500
10 November 0600 UTC 55 0.3025
10 November 1200 UTC 60 0.3600
10 November 1800 UTC 60 0.3600
11 November 0000 UTC 65 0.4225
11 November 0600 UTC 70 0.4900
11 November 1200 UTC 75 0.5625
11 November 1800 UTC 65 0.4225
12 November 0000 UTC 65 Extratropical
Total     3.655

Season total

[edit]
StormTypeACE (104 kt2)
01L (Ana) Best Track 2.1200
02L (Bill) Best Track 1.0650
03L (Claudette) Best Track 1.1300
04L (Danny) Best Track 10.5325
05L (Erika) Best Track 2.7025
06L (Fred) Best Track 5.5275
07L (Grace) Best Track 1.9075
08L (Henri) Best Track 1.6525
10L (Ida) Best Track 3.1500
11L (Joaquin) Best Track 29.2425
12L (Kate) Best Track 3.6550
Total62.685

References

[edit]
  1. ^ Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved May 7, 2015.