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| 05L (Don) | Operational | 0.7300 | |
| 05L (Don) | Operational | 0.7300 | |
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| 06L (Emily) | Operational | 0.1600 | |
| 06L (Emily) | Operational | 0.1600 | |
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| 07L (Franklin) | Operational | |
| 07L (Franklin) | Operational | 3.7275 | |
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}} |
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Revision as of 11:58, 10 August 2017
This is the page for calculating the Accumulated cyclone energy for the 2017 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,
where vmax is estimated sustained wind speed in knots.
Operational (Advisories)
01L.Arlene
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 19 April | 11 am AST | 30 | 0 |
2 | 19 April | 5 pm AST | 30 | 0 |
3 | 19 April | 11 pm AST | 30 | 0 |
4 | 20 April | 5 am AST | 30 | 0 |
5 | 20 April | 11 am AST | 30 | 0 |
6 | 20 April | 5 pm AST | 40 | 0.1600 |
7 | 20 April | 11 pm AST | 45 | 0.2025 |
8 | 21 April | 5 am AST | 45 | 0.2025 |
9 | 21 April | 11 am AST | 45 | Post-trop. |
Total | 0.565 |
02L.Bret
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 18 June | 5 pm AST | 30 | Potential TC |
2 | 18 June | 11 pm AST | 35 | Potential TC |
3 | 19 June | 5 am AST | 35 | Potential TC |
4 | 19 June | 11 am AST | 35 | Potential TC |
5 | 19 June | 5 pm AST | 35 | 0.1225 |
6 | 19 June | 11 pm AST | 35 | 0.1225 |
7 | 20 June | 5 am AST | 35 | 0.1225 |
8 | 20 June | 11 am AST | 40 | 0.1600 |
9 | 20 June | 5 pm AST | 35 | Open wave |
Total | 0.5275 |
03L.Cindy
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 19 June | 4 pm CDT | 35 | Potential TC |
2 | 19 June | 10 pm CDT | 35 | Potential TC |
3 | 20 June | 4 am CDT | 35 | Potential TC |
4 | 20 June | 10 am CDT | 35 | Potential TC |
5 | 20 June | 4 pm CDT | 40 | 0.1600 |
6 | 20 June | 10 pm CDT | 50 | 0.2500 |
7 | 21 June | 4 am CDT | 50 | 0.2500 |
8 | 21 June | 10 am CDT | 45 | 0.2025 |
9 | 21 June | 4 pm CDT | 45 | 0.2025 |
10 | 21 June | 10 pm CDT | 45 | 0.2025 |
11 | 22 June | 4 am CDT | 35 | 0.1225 |
12 | 22 June | 10 am CDT | 30 | 0 |
13 | 22 June | 5 pm EDT | 20 | 0 |
14 | 22 June | 11 pm EDT | 15 | 0 |
15 | 23 June | 5 am EDT | 15 | 0 |
16 | 23 June | 11 am EDT | 30 | 0 |
17 | 23 June | 5 pm EDT | 20 | Post-trop. |
18 | 23 June | 11 pm EDT | 15 | Post-trop. |
19 | 24 June | 5 am EDT | 20 | Post-trop. |
20 | 24 June | 11 am EDT | - | Dissipated |
Total | 1.39 |
05L.Don
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 17 July | 5 pm AST | 35 | 0.1225 |
2 | 17 July | 11 pm AST | 40 | 0.1600 |
3 | 18 July | 5 am AST | 45 | 0.2025 |
4 | 18 July | 11 am AST | 35 | 0.1225 |
5 | 18 July | 5 pm AST | 35 | 0.1225 |
Total | 0.73 |
06L.Emily
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 31 July | 6 am EDT | 30 | special |
2 | 31 July | 8 am EDT | 40 | special |
3 | 31 July | 11 am EDT | 40 | 0.1600 |
4 | 31 July | 5 pm EDT | 30 | - |
5 | 31 July | 11 pm EDT | 25 | - |
6 | 1 Aug | 5 am EDT | 25 | - |
7 | 1 Aug | 11 am EDT | 25 | - |
8 | 1 Aug | 5 am EDT | 30 | - |
9 | 1 Aug | 11 am EDT | 30 | Post-trop. |
Total | 0.16 |
07L.Franklin
Adv. | Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|---|
1 | 6 August | 5 pm EDT | 30 | Potential TC |
2 | 6 August | 11 pm EDT | 35 | 0.1225 |
3 | 7 August | 5 am EDT | 40 | 0.1600 |
4 | 7 August | 10 am CDT | 50 | 0.2500 |
5 | 7 August | 4 pm CDT | 50 | 0.2500 |
6 | 7 August | 10 pm CDT | 50 | 0.2500 |
7 | 8 August | 4 am CDT | 45 | 0.2025 |
8 | 8 August | 10 am CDT | 40 | 0.1600 |
9 | 8 August | 4 pm CDT | 35 | 0.1225 |
10 | 8 August | 10 pm CDT | 45 | 0.2025 |
11 | 9 August | 4 am CDT | 55 | 0.3025 |
12 | 9 August | 10 am CDT | 60 | 0.3600 |
13 | 9 August | 4 pm CDT | 65 | 0.4225 |
14 | 9 August | 10 pm CDT | 75 | 0.5625 |
15 | 10 August | 4 am CDT | 60 | 0.3600 |
Total | 3.7275 |
Best Track (Tropical Cyclone Reports)
01L.Arlene
Date | Time | Maximum Sustained Winds (kt) | ACE (104 kt2) |
---|---|---|---|
16 April | 0600 UTC | 55 | Extratrop. |
16 April | 1200 UTC | 55 | Extratrop. |
16 April | 1800 UTC | 55 | Extratrop. |
17 April | 0000 UTC | 50 | Extratrop. |
17 April | 0600 UTC | 45 | Extratrop. |
17 April | 1200 UTC | 45 | Extratrop. |
17 April | 1800 UTC | 45 | Extratrop. |
18 April | 0000 UTC | 40 | Extratrop. |
18 April | 0600 UTC | 35 | Extratrop. |
18 April | 1200 UTC | 35 | Extratrop. |
18 April | 1800 UTC | 30 | Extratrop. |
19 April | 0000 UTC | 30 | 0 |
19 April | 0600 UTC | 30 | 0 |
19 April | 1200 UTC | 30 | 0 |
19 April | 1800 UTC | 30 | 0 |
20 April | 0000 UTC | 30 | 0 |
20 April | 0600 UTC | 35 | 0.1225 |
20 April | 1200 UTC | 35 | 0.1225 |
20 April | 1800 UTC | 40 | 0.1600 |
21 April | 0000 UTC | 45 | 0.2025 |
21 April | 0600 UTC | 45 | 0.2025 |
21 April | 1200 UTC | 45 | Extratrop. |
21 April | 1800 UTC | 40 | Extratrop. |
22 April | 0000 UTC | 40 | Extratrop. |
22 April | 0600 UTC | 40 | Extratrop. |
22 April | 1200 UTC | 35 | Extratrop. |
22 April | 1800 UTC | 30 | Extratrop. |
Total | 0.81 |
Season total
Storm | Type | ACE (104 kt2) |
---|---|---|
01L (Arlene) | Best Track | 0.8100 |
02L (Bret) | Operational | 0.5275 |
03L (Cindy) | Operational | 1.3900 |
05L (Don) | Operational | 0.7300 |
06L (Emily) | Operational | 0.1600 |
07L (Franklin) | Operational | 3.7275 |
Total | 7.345 |
References
- ^ Stacy R. Stewart (January 6, 2006). Tropical Storm Zeta Discussion Number 30 (Report). National Hurricane Center. Retrieved April 20, 2017.