Talk:2019 Atlantic hurricane season/ACE calcs

This is the page for calculating the Accumulated cyclone energy for the 2019 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.Andrea

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	20 May	6:30 pm AST	35	Special
2	20 May	11 pm AST	35	0.1225
3	21 May	5 am AST	35	0.1225
4	21 May	11 am AST	30	0
5	21 May	5 pm AST	30	Post-trop.
Total				0.245

02L.Barry

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	10 July	10 am CDT	25	0
2	10 July	4 pm CDT	25	0
3	10 July	10 pm CDT	25	0
4	11 July	4 am CDT	25	0
5	11 July	10 am CDT	35	0.1225
6	11 July	4 pm CDT	35	0.1225
7	11 July	10 pm CDT	45	0.2025
8	12 July	4 am CDT	45	0.2025
9	12 July	10 am CDT	55	0.3025
10	12 July	4 pm CDT	55	0.3025
11	12 July	10 pm CDT	55	0.3025
12	13 July	4 am CDT	55	0.3025
13	13 July	10 am CDT	65	0.4225
14	13 July	4 pm CDT	55	0.3025
15	13 July	10 pm CDT	45	0.2025
16	14 July	4 am CDT	40	0.1600
17	14 July	10 am CDT	35	0.1225
Total				3.07

03L.Three

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	22 July	5 pm EDT	25	0
2	22 July	11 pm EDT	25	0
3	23 July	5 am EDT	30	0
4	23 July	11 am EDT	30	Post-trop.
Total				0

04L.Chantal

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	20 August	11 pm AST	35	0.1225
2	21 August	5 am AST	35	0.1225
3	21 August	11 am AST	35	0.1225
4	21 August	5 pm AST	35	0.1225
5	21 August	11 pm AST	30	0
6	22 August	5 am AST	30	0
7	22 August	11 am AST	30	0
8	22 August	5 pm AST	30	0
9	23 August	11 pm AST	30	0
10	23 August	5 am AST	25	0
11	23 August	11 am AST	25	0
12	23 August	5 pm AST	25	0
13	23 August	11 pm AST	25	Post-trop.
Total				0.49

05L.Dorian

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	24 August	11 am AST	30	0
2	24 August	5 pm AST	35	0.1225
3	24 August	11 pm AST	35	0.1225
4	25 August	5 am AST	35	0.1225
5	25 August	11 am AST	35	0.1225
6	25 August	5 pm AST	45	0.2025
7	25 August	11 pm AST	45	0.2025
8	26 August	5 am AST	50	0.2500
9	26 August	11 am AST	50	0.2500
10	26 August	5 pm AST	50	0.2500
11	26 August	11 pm AST	45	0.2025
12	27 August	5 am AST	45	0.2025
13	27 August	11 am AST	45	0.2025
14	27 August	5 pm AST	45	0.2025
15	27 August	11 pm AST	45	0.2025
16	28 August	5 am AST	50	0.2500
17	28 August	11 am AST	60	0.3600
18	28 August	5 pm AST	70	0.4900
19	28 August	11 pm AST	75	0.5625
20	29 August	5 am AST	75	0.5625
21	29 August	11 am AST	75	0.5625
22	29 August	5 pm AST	75	0.5625
23	29 August	11 pm AST	90	0.8100
24	30 August	5 am AST	90	0.8100
25	30 August	11 am AST	95	0.9025
26	30 August	5 pm EDT	100	1.0000
27	30 August	11 pm EDT	120	1.4400
28	31 August	5 am EDT	120	1.4400
29	31 August	11 am EDT	130	1.6900
30	31 August	5 pm EDT	130	1.6900
31	31 August	11 pm EDT	130	1.6900
32	1 September	5 am EDT	130	1.6900
33	1 September	11 am EDT	155	2.4025
34	1 September	5 pm EDT	160	2.5600
35	1 September	11 pm EDT	155	2.4025
36	2 September	5 am EDT	145	2.1025
37	2 September	11 am EDT	135	1.8225
38	2 September	5 pm EDT	125	1.5625
39	2 September	11 pm EDT	115	1.3225
40	3 September	5 am EDT	105	1.1025
41	3 September	11 am EDT	95	0.9025
42	3 September	5 pm EDT	95	0.9025
43	3 September	11 pm EDT	95	0.9025
44	4 September	5 am EDT	90	0.8100
45	4 September	11 am EDT	90	0.8100
46	4 September	5 pm EDT	95	0.9025
47	4 September	11 pm EDT	100	1.0000
48	5 September	5 am EDT	100	1.0000
49	5 September	11 am EDT	95	0.9025
50	5 September	5 pm EDT	90	0.8100
51	5 September	11 pm EDT	85	0.7225
52	6 September	5 am EDT	80	0.6400
53	6 September	11 am EDT	80	0.6400
54	6 September	5 pm EDT	80	0.6400
55	6 September	11 pm EDT	80	0.6400
56	7 September	5 am EDT	75	0.5625
57	7 September	11 am EDT	75	0.5625
Total				47.7975

06L.Erin

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	26 August	5 pm EDT	30	0
2	26 August	11 pm EDT	30	0
3	27 August	5 am EDT	30	0
4	27 August	11 am EDT	30	0
5	27 August	5 pm EDT	30	0
6	27 August	11 pm EDT	35	0.1225
7	28 August	5 am EDT	35	0.1225
8	28 August	11 am EDT	30	0
Total				0.245

07L.Fernand

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	3 September	4 am EDT	30	Potential TC
2	3 September	10 am EDT	30	0
3	3 September	4 pm EDT	35	0.1225
4	3 September	10 pm EDT	45	0.2025
5	4 September	4 am EDT	45	0.2025
6	4 September	10 am EDT	40	0.1600
7	4 September	4 pm EDT	30	0
Total				0.6875

08L.Gabrielle

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	3 September	5 pm AST	30	0
2	3 September	11 pm AST	30	0
3	4 September	5 am AST	35	0.1225
4	4 September	11 am AST	45	0.2025
5	4 September	5 pm AST	45	0.2025
6	4 September	11 pm AST	45	0.2025
7	5 September	5 am AST	45	0.2025
8	5 September	11 am AST	45	0.2025
9	5 September	5 pm AST	40	0.1600
10	5 September	11 pm AST	35	0.1225
11	6 September	5 am AST	35	Post-trop.
12	6 September	11 am AST	40	0.1600
13	6 September	5 pm AST	40	0.1600
14	6 September	11 pm AST	50	0.2500
15	7 September	5 am AST	45	0.2025
16	7 September	11 am AST	45	0.2025
17	7 September	12:30 pm AST	45	Special
18	7 September	5 pm AST	45	0.2025
19	7 September	11 pm AST	45	0.2025
20	8 September	5 am AST	50	0.2500
21	8 September	11 am AST	50	0.2500
22	8 September	5 pm AST	55	0.3025
23	8 September	11 pm AST	55	0.3025
24	9 September	5 am AST	50	0.2500
25	9 September	11 am AST	45	0.2025
26	9 September	5 pm AST	45	0.2025
27	9 September	11 pm AST	45	0.2025
28	9 September	5 am AST	45	0.2025
Total				4.9625

09L.Humberto

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	12 September	5 pm EDT	25	Potential TC
2	12 September	11 pm EDT	25	Potential TC
3	13 September	5 am EDT	25	Potential TC
4	13 September	11 am EDT	25	Potential TC
5	13 September	5 pm EDT	25	0
6	13 September	11 pm EDT	35	0.1225
7	14 September	5 am EDT	35	0.1225
8	14 September	11 am EDT	45	0.2025
9	14 September	5 pm EDT	45	0.2025
10	14 September	11 pm EDT	50	0.2500
11	15 September	5 am EDT	50	0.2500
12	15 September	11 am EDT	55	0.3025
13	15 September	5 pm EDT	60	0.3600
14	15 September	11 pm EDT	65	0.4225
15	16 September	5 am EDT	75	0.5625
16	16 September	11 am EDT	75	0.5625
17	16 September	5 pm EDT	80	0.6400
18	16 September	11 pm EDT	80	0.6400
19	17 September	5 am EDT	80	0.6400
20	17 September	11 am EDT	85	0.7225
21	17 September	5 pm EDT	90	0.8100
22	17 September	11 pm EDT	100	1.0000
23	18 September	5 am EDT	100	1.0000
24	18 September	11 am EDT	105	1.1025
25	18 September	5 pm EDT	105	1.1025
26	18 September	11 pm EDT	105	1.1025
27	19 September	5 am EDT	110	1.2100
28	19 September	11 am EDT	95	0.9025
29	19 September	5 pm EDT	90	0.8100
30	19 September	11 pm EDT	85	Post-Tropical
Total				15.0425

10L.Jerry

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	17 September	11 am AST	30	0
2	17 September	5 pm AST	30	0
3	17 September	11 pm AST	30	0
4	18 September	5 am AST	40	0.1600
5	18 September	11 am AST	45	0.2025
6	18 September	5 pm AST	50	0.2500
7	18 September	11 pm AST	55	0.3025
8	19 September	5 am AST	60	0.3600
9	19 September	11 am AST	65	0.4225
10	19 September	5 pm AST	80	0.6400
11	19 September	11 pm AST	90	0.8100
12	20 September	5 am AST	90	0.8100
13	20 September	11 am AST	75	0.5625
14	20 September	5 pm AST	70	0.4900
15	20 September	11 pm AST	70	0.4900
16	21 September	5 am AST	55	0.3025
17	21 September	11 am AST	55	0.3025
18	21 September	5 pm AST	55	0.3025
19	21 September	11 pm AST	55	0.3025
20	22 September	5 am AST	55	0.3025
21	22 September	11 am AST	55	0.3025
22	22 September	5 pm AST	55	0.3025
23	22 September	11 pm AST	55	0.3025
24	23 September	5 am AST	55	0.3025
25	23 September	11 am AST	55	0.3025
26	23 September	5 pm AST	55	0.3025
27	23 September	11 pm AST	55	0.3025
28	24 September	5 am AST	50	0.2500
29	24 September	11 am AST	50	0.2500
30	24 September	5 pm AST	45	0.2025
31	24 September	11 pm AST	40	0.1600
32	25 September	5 am AST	40	Post-Trop.
Total				9.9925

11L.Imelda

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	17 September	12 pm CDT	30	Special
2	17 September	4 pm CDT	35	0.1225
3	17 September	10 pm CDT	30	0
4	18 September	4 am CDT	30	0
Total				0.1225

12L.Karen

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	22 September	5 am AST	35	0.1225
2	22 September	11 am AST	35	0.1225
3	22 September	5 pm AST	35	0.1225
4	22 September	11 pm AST	35	0.1225
5	23 September	5 am AST	35	0.1225
6	23 September	11 am AST	35	0.1225
7	23 September	5 pm AST	30	0
8	23 September	11 pm AST	30	0
9	24 September	5 am AST	35	0.1225
10	24 September	11 am AST	35	0.1225
11	24 September	5 pm AST	40	0.1600
12	24 September	11 pm AST	40	0.1600
13	25 September	5 am AST	40	0.1600
14	25 September	11 am AST	40	0.1600
15	25 September	5 pm AST	35	0.1225
16	25 September	11 pm AST	35	0.1225
Total				1.9875

13L.Lorenzo

Adv.	Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
1	22 September	11 pm AST	30	0
2	23 September	5 am AST	30	0
3	23 September	11 am AST	35	0.1225
4	23 September	5 pm AST	40	0.1600
5	23 September	11 pm AST	45	0.2025
6	24 September	5 am AST	55	0.3025
7	24 September	11 am AST	55	0.3025
8	24 September	5 pm AST	55	0.3025
9	24 September	11 pm AST	60	0.3600
10	25 September	5 am AST	70	0.4900
11	25 September	11 am AST	75	0.5625
12	25 September	5 pm AST	80	0.6400
13	25 September	11 pm AST	85	0.7225
Total				4.1675

Best Track (Tropical Cyclone Reports)

01L.Andrea

Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
20 May	1800 UTC	35	0.1225
21 May	0000 UTC	35	0.1225
21 May	0600 UTC	35	0.1225
21 May	1200 UTC	30	Low
21 May	1800 UTC	30	Low
22 May	0000 UTC	30	Low
22 May	0600 UTC	N/A	Dissipated
Total			0.3675

03L.Three

Date	Time	Maximum Sustained Winds (kt)	ACE (10⁴ kt²)
22 July	1200 UTC	25	0
22 July	1800 UTC	25	0
23 July	0000 UTC	25	0
23 July	0600 UTC	30	0
23 July	1200 UTC	30	0
23 July	1800 UTC	N/A	Dissipated
Total			0

Season total

Storm	Type	ACE (10⁴ kt²)
01L (Andrea)	Best Track	0.3675
02L (Barry)	Operational	3.0700
03L (Three)	Best Track	0.0000
04L (Chantal)	Operational	0.4900
05L (Dorian)	Operational	47.7975
06L (Erin)	Operational	0.2450
07L (Fernand)	Operational	0.6875
08L (Gabrielle)	Operational	4.9625
09L (Humberto)	Operational	15.0425
10L (Jerry)	Operational	9.9925
11L (Imelda)	Operational	0.1225
12L (Karen)	Operational	1.9875
13L (Lorenzo)	Operational	4.1675
Total		88.9325

References

^ Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved May 8, 2018.

[1] Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved May 8, 2018.

[1]