Talk:2014 Atlantic hurricane season/ACE calcs

This is the page for calculating the Accumulated Cyclone Energy for the 2014 Atlantic hurricane season. If any storms of a season happen to cross years, the storm's ACE counts for the previous year.

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.

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

where v_max is estimated sustained wind speed in knots.

Operational (Advisories)

01L.Arthur

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	30 June	11 pm EDT	30	0
2	1 July	5 am EDT	30	0
3	1 July	11 am EDT	35	0.1225
4	1 July	5 pm EDT	45	0.2025
5	1 July	11 pm EDT	45	0.2025
6	2 July	5 am EDT	50	0.2500
7	2 July	11 am EDT	50	0.2500
8	2 July	5 pm EDT	60	0.3600
9	2 July	11 pm EDT	60	0.3600
10	3 July	5 am EDT	65	0.4225
11	3 July	11 am EDT	80	0.6400
12	3 July	5 pm EDT	80	0.6400
13	3 July	11 pm EDT	85	0.7225
14	4 July	5 am EDT	85	0.7225
15	4 July	11 am EDT	80	0.6400
16	4 July	5 pm EDT	70	0.4900
17	4 July	11 pm EDT	65	0.4225
18	5 July	5 am EDT	60	0.3600
19	5 July	11 am EDT	50	Extratrop.
Total				6.8075

02L.Two

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	21 July	5 pm AST	30	0
2	21 July	11 pm AST	30	0
3	22 July	5 am AST	30	0
4	22 July	11 am AST	30	0
5	22 July	5 pm AST	30	0
6	22 July	11 pm AST	30	0
7	23 July	5 am AST	30	0
8	23 July	11 am AST	30	Low
Total				0

03L.Bertha

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	31 July	11 pm AST	40	0.1600
2	1 August	5 am AST	40	0.1600
3	1 August	11 am AST	45	0.2025
4	1 August	5 pm AST	45	0.2025
5	1 August	11 pm AST	45	0.2025
6	2 August	5 am AST	45	0.2025
7	2 August	11 am AST	45	0.2025
8	2 August	5 pm AST	40	0.1600
9	2 August	11 pm AST	40	0.1600
10	3 August	5 am AST	40	0.1600
11	3 August	11 am AST	40	0.1600
12	3 August	5 pm AST	40	0.1600
13	3 August	11 pm AST	55	0.3025
14	4 August	5 am AST	60	0.3600
15	4 August	11 am AST	70	0.4900
16	4 August	5 pm AST	65	0.4225
17	4 August	11 pm AST	65	0.4225
18	5 August	5 am AST	55	0.3025
19	5 August	11 am AST	50	0.2500
20	5 August	5 pm AST	45	0.2025
21	5 August	11 pm AST	45	0.2025
22	6 August	5 am AST	45	0.2025
23	6 August	11 am AST	45	Extratrop.
Total				5.29

04L.Cristobal

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	23 August	5 pm AST	30	0
2	23 August	11 pm AST	30	0
3	24 August	5 am AST	30	0
4	24 August	11 am EDT	40	0.1600
5	24 August	5 pm EDT	40	0.1600
6	24 August	11 pm EDT	40	0.1600
7	25 August	5 am EDT	45	0.2025
8	25 August	11 am EDT	50	0.2500
9	25 August	5 pm EDT	50	0.2500
10	25 August	11 pm EDT	65	0.4225
11	26 August	5 am EDT	65	0.4225
12	26 August	11 am EDT	65	0.4225
13	26 August	5 pm EDT	65	0.4225
14	26 August	11 pm EDT	70	0.4900
15	27 August	5 am EDT	70	0.4900
16	27 August	11 am EDT	70	0.4900
17	27 August	5 pm EDT	65	0.4225
18	27 August	11 pm EDT	65	0.4225
19	28 August	5 am EDT	65	0.4225
20	28 August	11 am EDT	65	0.4225
21	28 August	5 pm EDT	70	0.4900
22	28 August	11 pm EDT	75	0.5625
23	29 August	5 am EDT	70	0.4900
24	29 August	11 am EDT	65	Post-trop.
Total				7.575

05L.Dolly

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	1 September	4 pm CDT	25	0
2	1 September	10 pm CDT	25	0
3	2 September	4 am CDT	40	0.1600
4	2 September	10 am CDT	45	0.2025
5	2 September	4 pm CDT	40	0.1600
6	2 September	10 pm CDT	40	0.1600
7	3 September	4 am CDT	35	0.1225
8	3 September	10 am CDT	25	Dissipated
Total				0.805

06L.Edouard

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	11 September	11 am EDT	30	0
2	11 September	5 pm AST	30	0
3	11 September	11 pm AST	35	0.1225
4	12 September	5 am EDT	35	0.1225
5	12 September	11 am EDT	40	0.1600
6	12 September	5 pm EDT	40	0.1600
7	12 September	11 pm EDT	40	0.1600
8	13 September	5 am EDT	45	0.2025
9	13 September	11 am EDT	45	0.2025
10	13 September	5 pm EDT	50	0.2500
11	13 September	11 pm EDT	55	0.3025
12	14 September	5 am EDT	60	0.3600
13	14 September	11 am EDT	70	0.4900
14	14 September	5 pm EDT	75	0.5625
15	14 September	11 pm EDT	75	0.5625
16	15 September	5 am EDT	90	0.8100
17	15 September	11 am EDT	90	0.8100
18	15 September	5 pm EDT	95	0.9025
19	15 September	11 pm EDT	95	0.9025
20	16 September	5 am EDT	95	0.9025
21	16 September	11 am EDT	100	1.0000
22	16 September	5 pm EDT	90	0.8100
23	16 September	11 pm EDT	80	0.6400
24	17 September	5 am EDT	80	0.6400
25	17 September	11 am EDT	80	0.6400
26	17 September	5 pm EDT	75	0.5625
27	17 September	11 pm EDT	75	0.5625
28	18 September	5 am EDT	75	0.5625
29	18 September	11 am EDT	70	0.4900
30	18 September	5 pm EDT	60	0.3600
31	18 September	11 pm EDT	60	0.3600
32	19 September	5 am EDT	50	0.2500
33	19 September	11 am EDT	40	0.1600
34	19 September	5 pm EDT	35	Post-trop.
Total				15.0225

07L.Fay

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	10 October	11 am EDT	30	0
2	10 October	5 pm EDT	35	0.1225
3	10 October	8 pm EDT	50	special
4	10 October	11 pm EDT	50	0.2500
5	11 October	5 am EDT	50	0.2500
6	11 October	11 am EDT	60	0.3600
7	11 October	5 pm EDT	60	0.3600
8	11 October	11 pm EDT	60	0.3600
9	12 October	5 am EDT	60	0.3600
10	12 October	11 am EDT	60	0.3600
11	12 October	5 pm EDT	65	0.4225
12	12 October	11 pm EDT	55	0.3025
13	13 October	5 am EDT	55	0.3025
14	13 October	11 am EDT	50	0.2500
15	13 October	5 pm EDT	45	Low
Total				3.7

08L.Gonzalo

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	12 October	1:30 pm EDT	35	Special
2	12 October	5 pm EDT	40	0.1600
3	12 October	11 pm EDT	40	0.1600
4	13 October	5 am EDT	50	0.2500
5	13 October	11 am EDT	55	0.3025
6	13 October	5 pm EDT	65	0.4225
7	13 October	11 pm EDT	75	0.5625
8	14 October	5 am EDT	95	0.9025
9	14 October	11 am EDT	95	0.9025
10	14 October	5 pm EDT	100	1.0000
11	14 October	11 pm EDT	110	1.2100
12	15 October	5 am EDT	110	1.2100
13	15 October	11 am EDT	115	1.3225
14	15 October	5 pm EDT	110	1.2100
15	15 October	11 pm EDT	105	1.1025
16	16 October	5 am EDT	120	1.44
17	16 October	11 am EDT	125	1.5625
18	16 October	5 pm EDT	125	1.5625
19	16 October	11 pm EDT	120	1.44
20	17 October	5 am EDT	115	1.3225
21	17 October	11 am EDT	110	1.2100
22	17 October	5 pm EDT	100	1.0000
23	17 October	11 pm EDT	95	0.9025
24	18 October	5 am EDT	90	0.8100
25	18 October	11 am EDT	80	0.6400
26	18 October	5 pm EDT	80	0.6400
27	18 October	11 pm EDT	80	0.6400
28	19 October	5 am EDT	75	0.5625
29	19 October	11 am EDT	75	0.5625
30	19 October	5 pm EDT	70	Post-Trop.
Total				25.0125

09L.Hanna

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1	21 October	10 pm CDT	30	0
2	22 October	4 am CDT	30	0
3	22 October	10 am CDT	30	0
4	22 October	4 pm CDT	30	0
5	22 October	10 pm CDT	25	Post-trop.
6	27 October	11 am EDT	35	0.1225
7	27 October	5 pm EDT	35	0.1225
Total				0.245

Best Track (Tropical Cyclone Report)

01L.Arthur

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1 July	0000 UTC	30	0
1 July	0600 UTC	30	0
1 July	1200 UTC	35	0.1225
1 July	1800 UTC	40	0.1600
2 July	0000 UTC	45	0.2025
2 July	0600 UTC	50	0.2500
2 July	1200 UTC	55	0.3025
2 July	1800 UTC	60	0.3600
3 July	0000 UTC	65	0.4225
3 July	0600 UTC	70	0.4900
3 July	1200 UTC	80	0.6400
3 July	1800 UTC	80	0.6400
4 July	0000 UTC	85	0.7225
4 July	0600 UTC	85	0.7225
4 July	1200 UTC	80	0.6400
4 July	1800 UTC	70	0.4900
5 July	0000 UTC	65	0.4225
5 July	0600 UTC	60	0.3600
5 July	1200 UTC	60	Extratrop.
Total			6.9475

02L.Two

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
21 July	1200 UTC	30	0
21 July	1800 UTC	30	0
22 July	0000 UTC	30	0
22 July	0600 UTC	30	0
22 July	1200 UTC	30	0
22 July	1800 UTC	30	0
23 July	0000 UTC	30	0
23 July	0600 UTC	30	0
23 July	1200 UTC	30	0
23 July	1800 UTC	--	Dissipated
Total			0

03L.Bertha

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1 August	0000 UTC	40	0.1600
1 August	0600 UTC	40	0.1600
1 August	1200 UTC	45	0.2025
1 August	1800 UTC	45	0.2025
2 August	0000 UTC	45	0.2025
2 August	0600 UTC	40	0.1600
2 August	1200 UTC	40	0.1600
2 August	1800 UTC	40	0.1600
3 August	0000 UTC	40	0.1600
3 August	0600 UTC	40	0.1600
3 August	1200 UTC	40	0.1600
3 August	1800 UTC	45	0.2025
4 August	0000 UTC	55	0.3025
4 August	0600 UTC	60	0.3600
4 August	1200 UTC	70	0.4900
4 August	1800 UTC	70	0.4900
5 August	0000 UTC	65	0.4225
5 August	0600 UTC	55	0.3025
5 August	1200 UTC	50	0.2500
5 August	1800 UTC	45	0.2025
6 August	0000 UTC	45	0.2025
6 August	0600 UTC	45	0.2025
6 August	1200 UTC	45	0.2025
6 August	1800 UTC	45	Extratrop.
Total			5.5175

04L.Cristobal

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
23 August	1800 UTC	30	0
24 August	0000 UTC	30	0
24 August	0600 UTC	35	0.1225
24 August	1200 UTC	40	0.1600
24 August	1800 UTC	45	0.2025
25 August	0000 UTC	45	0.2025
25 August	0600 UTC	45	0.2025
25 August	1200 UTC	50	0.2500
25 August	1800 UTC	50	0.2500
26 August	0000 UTC	65	0.4225
26 August	0600 UTC	65	0.4225
26 August	1200 UTC	65	0.4225
26 August	1800 UTC	65	0.4225
27 August	0000 UTC	70	0.4900
27 August	0600 UTC	70	0.4900
27 August	1200 UTC	70	0.4900
27 August	1800 UTC	65	0.4225
28 August	0000 UTC	65	0.4225
28 August	0600 UTC	65	0.4225
28 August	1200 UTC	70	0.4900
28 August	1800 UTC	75	0.5625
29 August	0000 UTC	75	0.5625
29 August	0600 UTC	70	0.4900
29 August	1200 UTC	65	Extratrop.
Total			7.9225

05L.Dolly

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
1 September	1800 UTC	30	0
2 September	0000 UTC	35	0.1225
2 September	0600 UTC	40	0.1600
2 September	1200 UTC	45	0.2025
2 September	1800 UTC	40	0.1600
3 September	0000 UTC	40	0.1600
3 September	0600 UTC	35	0.1225
3 September	1200 UTC	25	Low
Total			0.9275

06L.Edouard

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
12 September	0000 UTC	35	0.1225
12 September	0600 UTC	35	0.1225
12 September	1200 UTC	40	0.1600
12 September	1800 UTC	40	0.1600
13 September	0000 UTC	40	0.1600
13 September	0600 UTC	45	0.2025
13 September	1200 UTC	45	0.2025
13 September	1800 UTC	50	0.2500
14 September	0000 UTC	55	0.3025
14 September	0600 UTC	60	0.3600
14 September	1200 UTC	70	0.4900
14 September	1800 UTC	75	0.5625
15 September	0000 UTC	80	0.6400
15 September	0600 UTC	85	0.7225
15 September	1200 UTC	90	0.8100
15 September	1800 UTC	95	0.9025
16 September	0000 UTC	95	0.9025
16 September	0600 UTC	100	1.0000
16 September	1200 UTC	105	1.1025
16 September	1800 UTC	95	0.9025
17 September	0000 UTC	85	0.7225
17 September	0600 UTC	85	0.7225
17 September	1200 UTC	80	0.6400
17 September	1800 UTC	80	0.6400
18 September	0000 UTC	75	0.5625
18 September	0600 UTC	70	0.4900
18 September	1200 UTC	70	0.4900
18 September	1800 UTC	65	0.4225
19 September	0000 UTC	60	0.3600
19 September	0600 UTC	55	0.3025
19 September	1200 UTC	45	0.2025
19 September	1800 UTC	40	Low
Total			15.6325

07L.Fay

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
10 October	0600 UTC	35	0.1225
10 October	1200 UTC	35	0.1225
10 October	1800 UTC	40	0.1600
11 October	0000 UTC	50	0.2500
11 October	0600 UTC	55	0.3025
11 October	1200 UTC	60	0.3600
11 October	1800 UTC	60	0.3600
12 October	0000 UTC	60	0.3600
12 October	0600 UTC	65	0.4225
12 October	1200 UTC	70	0.4900
12 October	1800 UTC	60	0.3600
13 October	0000 UTC	50	0.2500
13 October	0600 UTC	--	Dissipated
Total			3.56

08L.Gonzalo

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
12 October	0000 UTC	30	0
12 October	0600 UTC	30	0
12 October	1200 UTC	35	0.1225
12 October	1800 UTC	40	0.1600
13 October	0000 UTC	45	0.2025
13 October	0600 UTC	55	0.3025
13 October	1200 UTC	65	0.4225
13 October	1800 UTC	70	0.4900
14 October	0000 UTC	80	0.6400
14 October	0600 UTC	90	0.8100
14 October	1200 UTC	95	0.9025
14 October	1800 UTC	100	1.0000
15 October	0000 UTC	115	1.3225
15 October	0600 UTC	115	1.3225
15 October	1200 UTC	115	1.3225
15 October	1800 UTC	110	1.2100
16 October	0000 UTC	110	1.2100
16 October	0600 UTC	115	1.3225
16 October	1200 UTC	125	1.5625
16 October	1800 UTC	125	1.5625
17 October	0000 UTC	120	1.4400
17 October	0600 UTC	115	1.3225
17 October	1200 UTC	110	1.2100
17 October	1800 UTC	105	1.1025
18 October	0000 UTC	95	0.9025
18 October	0600 UTC	90	0.8100
18 October	1200 UTC	85	0.7225
18 October	1800 UTC	85	0.7225
19 October	0000 UTC	85	0.7225
19 October	0600 UTC	80	0.6400
19 October	1200 UTC	70	0.4900
19 October	1800 UTC	65	Extratrop.
Total			25.9725

09L.Hanna

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
22 October	0000 UTC	30	0
22 October	0600 UTC	30	0
22 October	1200 UTC	30	0
22 October	1800 UTC	30	0
23 October	0000 UTC	25	Low
Between 0000 UTC 23 October and 0000 UTC 27 October, the system was a tropical disturbance, not a tropical cyclone.
27 October	0000 UTC	30	0
27 October	0600 UTC	35	0.1225
27 October	1200 UTC	35	0.1225
27 October	1800 UTC	30	0
28 October	0000 UTC	30	0
28 October	0600 UTC	25	Low
Total			0.245

Season total

Storm	Type	ACE (104 kt2)
01L (Arthur)	Best Track	6.9475
02L (Two)	Best Track	0
03L (Bertha)	Best Track	5.5175
04L (Cristobal)	Best Track	7.9225
05L (Dolly)	Best Track	0.9275
06L (Edouard)	Best Track	15.6325
07L (Fay)	Best Track	3.5600
08L (Gonzalo)	Best Track	25.9725
09L (Hanna)	Best Track	0.2450
Total		66.725