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This is the page for calculating the Accumulated Cyclone Energy for the 2007 Atlantic hurricane season.

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 usually 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. If any storms of a season happen to cross years, the storm's ACE counts for the previous year. [1]

where vmax is estimated sustained wind speed in knots.

Operational (Advisories)

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01L.Andrea

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NOTE: Andrea is not to be included in total ACE calculations as it was subtropical.

Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 9 May 11 am CDT 40 0.160
2 9 May 5 pm CDT 40 0.160
3 9 May 11 pm CDT 40 0.160
4 10 May 5 am CDT 35 0.1225
5 10 May 11 am CDT 30 0
6 10 May 5 pm CDT 30 0
7 10 May 11 pm CDT 30 0
Total       0.6025

02L.Barry

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 1 June 4 pm CDT 40 0.1600
2 1 June 10 pm CDT 45 0.2025
3 2 June 4 am CDT 45 0.2025
4 2 June 10 am CDT 30 0
5 2 June 4 pm CDT 30 0
Total       0.565

03L.Chantal

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 30 July 11 pm EDT 30 0
2 31 July 5 am EDT 30 0
3 31 July 11 am EDT 45 0.2025
4 31 July 5 pm EDT 45 0.2025
5 31 July 11 pm EDT 45 0.2025
Total       0.6075

04L.Dean

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 13 August 11 am EDT 30 0
2 13 August 5 pm EDT 30 0
3 13 August 11 pm EDT 30 0
4 14 August 5 am EDT 30 0
5 14 August 11 am EDT 35 0.1225
6 14 August 5 pm EDT 35 0.1225
7 14 August 11 pm EDT 45 0.2025
8 15 August 5 am EDT 45 0.2025
9 15 August 11 am EDT 50 0.2500
10 15 August 5 pm EDT 55 0.3025
11 15 August 11 pm EDT 60 0.3600
12 16 August 5 am EDT 65 0.4225
13 16 August 11 am EDT 80 0.6400
14 16 August 5 pm EDT 85 0.7225
15 16 August 11 pm EDT 85 0.7225
16 17 August 5 am EDT 85 0.7225
17 17 August 11 am EDT 90 0.8100
18 17 August 1:45 pm EDT 110 Special
19 17 August 5 pm EDT 110 1.2100
20 17 August 11 pm EDT 125 1.5625
21 18 August 5 am EDT 130 1.6900
22 18 August 11 am EDT 130 1.6900
23 18 August 5 pm EDT 130 1.6900
24 18 August 11 pm EDT 125 1.5625
25 19 August 5 am EDT 125 1.5625
26 19 August 11 am EDT 125 1.5625
27 19 August 5 pm EDT 125 1.5625
28 19 August 11 pm EDT 125 1.5625
29 20 August 5 am EDT 130 1.6900
30 20 August 11 am EDT 130 1.6900
31 20 August 5 pm EDT 130 1.6900
32 20 August 11 pm EDT 140 1.9600
33 21 August 5 am EDT 145 2.1025
34 21 August 11 am EDT 90 0.8100
35 21 August 5 pm EDT 70 0.4900
36 21 August 11 pm EDT 70 0.4900
37 22 August 5 am EDT 70 0.4900
38 22 August 11 am EDT 85 0.7225
39 22 August 5 pm EDT 60 0.3600
40 22 August 11 pm EDT 30 0
Total       33.7525

05L.Erin

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 14 August 11 pm EDT 25 0
2 15 August 5 am EDT 25 0
3 15 August 11 am EDT 25 0
4 15 August 11:30 am EDT 35 Special
5 15 August 5 pm EDT 35 0.1225
6 15 August 11 pm EDT 35 0.1225
7 16 August 5 am EDT 35 0.1225
8 16 August 11 am EDT 30 0
Total       0.3675

06L.Felix

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 31 August 5 pm EDT 30 0
2 31 August 11 pm EDT 30 0
3 1 September 5 am EDT 35 0.1225
4 1 September 11 am EDT 55 0.3025
5 1 September 5 pm EDT 60 0.3600
6 1 September 11 pm EDT 65 0.4225
7 2 September 5 am EDT 85 0.7225
8 2 September 11 am EDT 90 0.8100
9 2 September 5 pm EDT 120 1.4400
10 2 September 8 pm EDT 145 Special
11 2 September 11 pm EDT 145 2.1025
12 3 September 5 am EDT 145 2.1025
13 3 September 11 am EDT 140 1.9600
14 3 September 5 pm EDT 115 1.3225
15 3 September 11 pm EDT 115 1.3225
16 4 September 5 am EDT 135 1.8225
17 4 September 11 am EDT 105 1.1025
18 4 September 5 pm EDT 65 0.4225
19 4 September 11 pm EDT 45 0.2025
20 5 September 5 am EDT 25 0
Total       16.5400

07L.Gabrielle

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NOTE: Advisories issued when Gabrielle was subtropical are not to be included in total ACE calculations.

Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 7 September 11 pm EDT 40 Subtrop
2 8 September 5 am EDT 40 Subtrop
3 8 September 11 am EDT 40 Subtrop
4 8 September 5 pm EDT 35 0.1225
5 8 September 11 pm EDT 35 0.1225
6 9 September 5 am EDT 40 0.1600
7 9 September 8 am EDT 45 Special
8 9 September 11 am EDT 45 0.2025
9 9 September 5 pm EDT 45 0.2025
10 9 September 11 pm EDT 40 0.1600
11 10 September 5 am EDT 30 0
12 10 September 11 am EDT 30 0
13 10 September 5 pm EDT 30 0
14 10 September 11 pm EDT 30 0
15 11 September 5 am EDT 30 0
16 11 September 11 am EDT 30 0
Total       0.9700

08L.Ingrid

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 12 September 11 am EDT 30 0
2 12 September 5 pm EDT 30 0
3 12 September 11 pm EDT 30 0
4 13 September 5 am EDT 30 0
5 13 September 11 am EDT 30 0
6 13 September 5 pm EDT 30 0
7 13 September 11 pm EDT 35 0.1225
8 14 September 5 am EDT 35 0.1225
9 14 September 11 am EDT 40 0.1600
10 14 September 5 pm EDT 35 0.1225
11 14 September 11 pm EDT 35 0.1225
12 15 September 5 am EDT 35 0.1225
13 15 September 11 am EDT 30 0
14 15 September 5 pm EDT 30 0
15 15 September 11 pm EDT 30 0
16 16 September 5 am EDT 30 0
17 16 September 11 am EDT 30 0
18 16 September 5 pm EDT 30 0
19 16 September 11 pm EDT 25 0
Total       0.7725

09L.Humberto

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 12 September 10 am CDT 30 0
2 12 September 4 pm CDT 45 0.2025
3 12 September 10 pm CDT 55 0.3025
4 13 September 12:15 am CDT 70 Special
5 13 September 4 am CDT 75 0.5625
6 13 September 10 am CDT 55 0.3025
7 13 September 4 pm CDT 30 0
Total       1.3700

10L.NONAME

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  • Never strengthened into tropical storm, ACE is 0

11L.Jerry

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NOTE: Advisories issued when Jerry was subtropical are not to be included in total ACE calculations.

Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 23 September 5 am EDT 30 Subtrop
2 23 September 11 am EDT 35 Subtrop
3 23 September 5 pm EDT 35 Subtrop
4 23 September 11 pm EDT 35 0.1225
5 24 September 5 am EDT 35 0.1225
6 24 September 11 am EDT 30 0
7 24 September 5 pm EDT 30 0
8 24 September 11 pm EDT 40 Low
Total       0.2450

12L.Karen

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 24 September 11 pm EDT 30 0
2 25 September 5 am EDT 35 0.1225
3 25 September 11 am EDT 35 0.1225
4 25 September 5 pm EDT 35 0.1225
5 25 September 11 pm EDT 35 0.1225
6 26 September 5 am EDT 45 0.2025
7 26 September 11 am EDT 60 0.3600
8 26 September 5 pm EDT 60 0.3600
9 26 September 11 pm EDT 60 0.3600
10 27 September 5 am EDT 55 0.3025
11 27 September 11 am EDT 55 0.3025
12 27 September 5 pm EDT 50 0.2500
13 27 September 11 pm EDT 50 0.2500
14 28 September 5 am EDT 40 0.1600
15 28 September 11 am EDT 35 0.1225
16 28 September 5 pm EDT 35 0.1225
17 28 September 11 pm EDT 35 0.1225
18 29 September 5 am EDT 35 0.1225
19 29 September 11 am EDT 30 0
20 29 September 5 pm EDT 30 0
Total       3.5275

13L.Lorenzo

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 25 September 4 pm CDT 25 0
2 25 September 10 pm CDT 25 0
3 26 September 4 am CDT 30 0
4 26 September 10 am CDT 30 0
5 26 September 4 pm CDT 30 0
6 26 September 10 pm CDT 30 0
7 27 September 4 am CDT 30 0
8 27 September 10 am CDT 30 0
9 27 September 1 pm CDT 50 Special
10 27 September 4 pm CDT 60 0.3600
11 27 September 10 pm CDT 70 0.4900
12 28 September 4 am CDT 55 0.3025
13 28 September 10 am CDT 30 0
14 28 September 4 pm CDT 20 0
Total       1.1525

14L.Melissa

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 28 September 11 am EDT 30 0
2 28 September 5 pm EDT 30 0
3 28 September 11 pm EDT 30 0
4 29 September 5 am EDT 35 0.1225
5 29 September 11 am EDT 35 0.1225
6 29 September 5 pm EDT 35 0.1225
7 29 September 11 pm EDT 40 0.1600
8 30 September 5 am EDT 35 0.1225
9 30 September 11 am EDT 25 0
Total       0.6500

15L.NONAME

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  • Never strengthened into tropical storm, ACE is 0

16L.Noel

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Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 27 October 11 pm EDT 30 0
2 28 October 5 am EDT 30 0
3 28 October 11 am EDT 30 0
4 28 October 2:15 pm EDT 45 Special
5 28 October 5 pm EDT 50 0.2500
6 28 October 11 pm EDT 50 0.2500
7 29 October 5 am EDT 45 0.2025
8 29 October 11 am EDT 40 0.1600
9 29 October 5 pm EDT 45 0.2025
10 29 October 11 pm EDT 45 0.2025
11 30 October 5 am EDT 50 0.2500
12 30 October 11 am EDT 40 0.1600
13 30 October 5 pm EDT 35 0.1225
14 30 October 11 pm EDT 35 0.1225
15 31 October 5 am EDT 35 0.1225
16 31 October 11 am EDT 45 0.2025
17 31 October 5 pm EDT 45 0.2025
18 31 October 11 pm EDT 50 0.2500
19 1 November 5 am EDT 50 0.2500
20 1 November 11 am EDT 50 0.2500
21 1 November 5 pm EDT 55 0.3025
22 1 November 11 pm EDT 70 0.4900
23 2 November 5 am EDT 70 0.4900
24 2 November 11 am EDT 70 0.4900
25 2 November 5 pm EDT 70 EXT
Total       5.2125

17L.Olga

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NOTE: Advisories issued when Olga was subtropical are not to be included in total ACE calculations.

Adv. Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 10 December 10 pm EST 35 Subtrop
2 11 December 4 am EST 40 Subtrop
3 11 December 10 am EST 40 Subtrop
4 11 December 4 pm EST 40 Subtrop
5 11 December 10 pm EST 50 0.2500
6 12 December 4 am EST 45 0.2025
7 12 December 10 am EST 35 0.1225
Total       0.5750

Best Track (TCR)

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01L.Andrea

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NOTE: Andrea is partially included in total ACE calculations as it was subtropical after being extratropical.

See Andrea's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
9 May 0600 UTC 50 0.2500
9 May 1200 UTC 45 0.2025
9 May 1800 UTC 40 0.1600
10 May 0000 UTC 40 0.1600
10 May 0600 UTC 35 0.1225
Total     0.8950

02L.Barry

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From Barry's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 June 1800 UTC 40 0.1600
2 June 0000 UTC 50 0.2500
2 June 0600 UTC 45 0.2025
2 June 1200 UTC 40 0.1600
Total     0.7725

03L.Chantal

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From Chantal's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
31 July 0600 UTC 35 0.1225
31 July 1200 UTC 45 0.2025
31 July 1800 UTC 45 0.2025
1 August 0000 UTC 45 0.2025
Total     0.7300

04L.Dean

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From Dean's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
14 August 1200 UTC 35 0.1225
14 August 1800 UTC 40 0.1600
15 August 0000 UTC 50 0.2500
15 August 0600 UTC 50 0.2500
15 August 1200 UTC 50 0.2500
15 August 1800 UTC 55 0.3025
16 August 0000 UTC 60 0.3600
16 August 0600 UTC 70 0.4900
16 August 1200 UTC 80 0.6400
16 August 1800 UTC 80 0.6400
17 August 0000 UTC 80 0.6400
17 August 0600 UTC 80 0.6400
17 August 1200 UTC 90 0.8100
17 August 1800 UTC 110 1.2100
18 August 0000 UTC 125 1.5625
18 August 0600 UTC 145 2.1025
18 August 1200 UTC 145 2.1025
18 August 1800 UTC 130 1.6900
19 August 0000 UTC 120 1.4400
19 August 0600 UTC 120 1.4400
19 August 12000 UTC 125 1.5625
19 August 1800 UTC 125 1.5625
20 August 0000 UTC 125 1.5625
20 August 0600 UTC 130 1.6900
20 August 1200 UTC 130 1.6900
20 August 1800 UTC 135 1.8225
21 August 0000 UTC 145 2.1025
21 August 0600 UTC 150 2.2500
21 August 1200 UTC 110 1.2100
21 August 1800 UTC 75 0.5625
22 August 0000 UTC 65 0.4225
22 August 0600 UTC 70 0.4900
22 August 1200 UTC 80 0.6400
22 August 1800 UTC 75 0.5625
Total     35.2325

05L.Erin

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From Erin's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
15 August 1800 UTC 35 0.1225
16 August 0000 UTC 35 0.1225
16 August 0600 UTC 35 0.1225
Total     0.3675

06L.Felix

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From Felix's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
1 September 0000 UTC 35 0.1225
1 September 0600 UTC 40 0.1600
1 September 1200 UTC 50 0.2500
1 September 1800 UTC 60 0.3600
2 September 0000 UTC 65 0.4225
2 September 0600 UTC 85 0.7225
2 September 1200 UTC 90 0.8100
2 September 1800 UTC 115 1.3225
3 September 0000 UTC 150 2.2500
3 September 0600 UTC 150 2.2500
3 September 1200 UTC 140 1.9600
3 September 1800 UTC 115 1.3225
4 September 0000 UTC 115 1.3225
4 September 0600 UTC 135 1.8225
4 September 1200 UTC 140 1.9600
4 September 1800 UTC 85 0.7225
5 September 0000 UTC 50 0.2500
Total     18.0300

07L.Gabrielle

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From Gabrielle's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
8 September 1800 UTC 35 0.1225
9 September 0000 UTC 40 0.1600
9 September 0600 UTC 45 0.2025
9 September 1200 UTC 50 0.2500
9 September 1800 UTC 45 0.2025
10 September 0000 UTC 40 0.1600
Total     1.0975

08L.Ingrid

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From Ingrid's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
13 September 0600 UTC 35 0.1225
13 September 1200 UTC 35 0.1225
13 September 1800 UTC 35 0.1225
14 September 0000 UTC 35 0.1225
14 September 0600 UTC 35 0.1225
14 September 1200 UTC 40 0.1600
14 September 1800 UTC 40 0.1600
15 September 0000 UTC 35 0.1225
15 September 0600 UTC 35 0.1225
15 September 1200 UTC 35 0.1225
Total     1.3000

09L.Humberto

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From Humberto's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
12 September 1200 UTC 35 0.1225
12 September 1800 UTC 45 0.2025
13 September 0000 UTC 55 0.3025
13 September 0600 UTC 80 0.6400
13 September 1200 UTC 65 0.4225
13 September 1800 UTC 35 0.1225
Total     1.8125

11L.Jerry

[edit]

From Jerry's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
24 September 0000 UTC 35 0.1225
24 September 0600 UTC 35 0.1225
24 September 1200 UTC 35 0.1225
Total     0.3675

12L.Karen

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From Karen's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
25 September 0600 UTC 35 0.1225
25 September 1200 UTC 35 0.1225
25 September 1800 UTC 35 0.1225
26 September 0000 UTC 40 0.1600
26 September 0600 UTC 50 0.2500
26 September 1200 UTC 65 0.4225
26 September 1800 UTC 65 0.4225
27 September 0000 UTC 60 0.3600
27 September 0600 UTC 55 0.3025
27 September 1200 UTC 55 0.3025
27 September 1800 UTC 50 0.2500
28 September 0000 UTC 50 0.2500
28 September 0600 UTC 40 0.1600
28 September 1200 UTC 35 0.1225
28 September 1800 UTC 35 0.1225
29 September 0000 UTC 35 0.1225
Total     3.6150

13L.Lorenzo

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From Lorenzo's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
27 September 1200 UTC 45 0.2025
27 September 1800 UTC 60 0.3600
28 September 0000 UTC 70 0.4900
28 September 0600 UTC 65 0.4225
Total     1.4750

14L.Melissa

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From Melissa's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
29 September 0600 UTC 35 0.1225
29 September 1200 UTC 35 0.1225
29 September 1800 UTC 35 0.1225
30 September 0000 UTC 35 0.1225
Total     0.4900

16L.Noel

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From Noel's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
28 October 1200 UTC 40 0.1600
28 October 1800 UTC 50 0.2500
29 October 0000 UTC 50 0.2500
29 October 0600 UTC 45 0.2025
29 October 1200 UTC 40 0.1600
29 October 1800 UTC 45 0.2025
30 October 0000 UTC 45 0.2025
30 October 0600 UTC 50 0.2500
30 October 1200 UTC 40 0.1600
30 October 1800 UTC 35 0.1225
31 October 0000 UTC 35 0.1225
31 October 0600 UTC 35 0.1225
31 October 1200 UTC 45 0.2025
31 October 1800 UTC 45 0.2025
1 November 0000 UTC 50 0.2500
1 November 0600 UTC 50 0.2500
1 November 1200 UTC 50 0.2500
1 November 1800 UTC 55 0.3025
2 November 0000 UTC 70 0.4900
2 November 0600 UTC 70 0.4900
2 November 1200 UTC 70 0.4900
2 November 1800 UTC 70 0.4900
Total     5.6225

17L.Olga

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From Olga's Tropical Cyclone Report.

Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
11 December 1800 UTC 50 0.2500
12 December 0000 UTC 50 0.2500
12 December 0600 UTC 40 0.1600
12 December 1200 UTC 35 0.1225
Total     0.7825

Season total

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StormTypeACE (104 kt2)
01L (Andrea) Best track 0.8950
02L (Barry) Best track 0.7725
03L (Chantal) Best track 0.7300
04L (Dean) Best track 35.2325
05L (Erin) Best track 0.3675
06L (Felix) Best track 18.0300
07L (Gabrielle) Best track 1.0975
08L (Humberto) Best track 1.8125
09L (Ingrid) Best track 1.3000
10L (NONAME) Best track 0.0000
11L (Jerry) Best track 0.3675
12L (Karen) Best track 3.6150
13L (Lorenzo) Best track 1.4750
14L (Melissa) Best track 0.4900
15L (NONAME) Best track 0.0000
16L (Noel) Best track 5.6225
17L (Olga) Best track 0.7825
Total72.59

See also

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References

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