Talk:2007 Atlantic hurricane season/ACE calcs

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.

$\sum _{}^{}{\frac {{v_{\mathrm {max} }}^{2}}{10^{4}}},$

where v_max is estimated sustained wind speed in knots.

Operational (Advisories)

01L.Andrea

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				0.0000 (0.6025)

02L.Barry

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

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

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

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

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

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

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

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

• Never strengthened into tropical storm, ACE is 0

11L.Jerry

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

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

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

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

• Never strengthened into tropical storm, ACE is 0

16L.Noel

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

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)

01L.Andrea

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

See Andrea's Tropical Cyclone Report.

02L.Barry

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

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

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

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

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

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

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

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

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

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

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

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

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

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

See also

• Pacific ACE calcs