Talk:2008 Pacific typhoon season/ACE calcs

This is the page for calculating the Accumulated Cyclone Energy for the 2008 Pacific typhoon season using data from the Japan Meteorological Agency.

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.

Neoguri (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
15 April	0600 UTC	35	0.1225
15 April	1200 UTC	40	0.1600
15 April	1800 UTC	45	0.2025
16 April	0000 UTC	50	0.2500
16 April	0600 UTC	60	0.3600
16 April	1200 UTC	65	0.4225
16 April	1800 UTC	70	0.4900
17 April	0000 UTC	75	0.5625
17 April	0600 UTC	80	0.6400
17 April	1200 UTC	80	0.6400
17 April	1800 UTC	80	0.6400
18 April	0000 UTC	80	0.6400
18 April	0600 UTC	75	0.5625
18 April	1200 UTC	70	0.4900
18 April	1800 UTC	65	0.4225
19 April	0000 UTC	55	0.3025
19 April	0600 UTC	45	0.2025
19 April	1200 UTC	35	0.1225
Total			7.2325

Rammasun (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
07 May	1800 UTC	35	0.1225
08 May	0000 UTC	35	0.1225
08 May	0600 UTC	40	0.1600
08 May	1200 UTC	45	0.2025
08 May	1800 UTC	50	0.2500
09 May	0000 UTC	55	0.3025
09 May	0600 UTC	65	0.4225
09 May	1200 UTC	75	0.5625
09 May	1800 UTC	85	0.7225
10 May	0000 UTC	95	0.9025
10 May	0600 UTC	100	1.0000
10 May	1200 UTC	105	1.1025
10 May	1800 UTC	105	1.1025
11 May	0000 UTC	100	1.0000
11 May	0600 UTC	95	0.9025
11 May	1200 UTC	85	0.7225
11 May	1800 UTC	80	0.6400
12 May	0000 UTC	75	0.5625
12 May	0600 UTC	70	0.4900
12 May	1200 UTC	65	0.4225
12 May	1800 UTC	55	0.3025
Total			12.0175

Matmo (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
15 May	1200 UTC	35	0.1225
15 May	1800 UTC	40	0.1600
16 May	0000 UTC	45	0.2025
16 May	0600 UTC	50	0.2500
16 May	1200 UTC	45	0.2025
16 May	1800 UTC	40	0.1600
Total			1.0975

Halong (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
16 May	0600 UTC	35	0.1225
16 May	1200 UTC	45	0.1600
16 May	1800 UTC	45	0.1600
17 May	0000 UTC	50	0.2500
17 May	0600 UTC	60	0.3600
17 May	1200 UTC	60	0.3600
17 May	1800 UTC	50	0.2500
18 May	0000 UTC	45	0.2025
18 May	0600 UTC	45	0.2025
18 May	1200 UTC	45	0.2025
18 May	1800 UTC	50	0.2500
19 May	0000 UTC	50	0.2500
19 May	0600 UTC	55	0.3025
19 May	1200 UTC	50	0.2500
19 May	1800 UTC	45	0.2025
20 May	0000 UTC	40	0.1600
20 May	0600 UTC	35	0.1225
Total			3.8075

Nakri (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
27 May	0600 UTC	35	0.1225
27 May	1200 UTC	40	0.1600
27 May	1800 UTC	45	0.2025
28 May	0000 UTC	55	0.3025
28 May	0600 UTC	65	0.4225
28 May	1200 UTC	70	0.4900
28 May	1800 UTC	80	0.6400
29 May	0000 UTC	85	0.7225
29 May	0600 UTC	95	0.9025
29 May	1200 UTC	100	1.0000
29 May	1800 UTC	100	1.0000
30 May	0000 UTC	100	1.0000
30 May	0600 UTC	95	0.9025
30 May	1200 UTC	85	0.7225
30 May	1800 UTC	80	0.6400
31 May	0000 UTC	75	0.5625
31 May	0600 UTC	70	0.4900
31 May	1200 UTC	65	0.4225
31 May	1800 UTC	65	0.4225
01 June	0000 UTC	70	0.4900
01 June	0600 UTC	70	0.4900
01 June	1200 UTC	70	0.4900
01 June	1800 UTC	75	0.5625
02 June	0000 UTC	75	0.5625
02 June	0600 UTC	75	0.5625
02 June	1200 UTC	75	0.5625
02 June	1800 UTC	70	0.4900
03 June	0000 UTC	55	0.3025
Total			15.64

Fengshen (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
19 June	0000 UTC	35	0.1225
19 June	0600 UTC	45	0.2025
19 June	1200 UTC	55	0.3025
19 June	1800 UTC	65	0.4225
20 June	0000 UTC	70	0.4900
20 June	0600 UTC	75	0.5625
20 June	1200 UTC	75	0.5625
20 June	1800 UTC	80	0.6400
21 June	0000 UTC	90	0.8100
21 June	0600 UTC	85	0.7225
21 June	1200 UTC	75	0.5625
21 June	1800 UTC	75	0.5625
22 June	0000 UTC	75	0.5625
22 June	0600 UTC	65	0.4225
22 June	1200 UTC	55	0.3025
22 June	1800 UTC	50	0.2500
23 June	0000 UTC	50	0.2500
23 June	0600 UTC	50	0.2500
23 June	1200 UTC	50	0.2500
23 June	1800 UTC	50	0.2500
24 June	0000 UTC	50	0.2500
24 June	0600 UTC	50	0.2500
24 June	1200 UTC	50	0.2500
24 June	1800 UTC	45	0.2025
25 June	0000 UTC	40	0.1600
Total			9.6125

Kalmaegi (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
15 July	0600 UTC	35	0.1225
15 July	1200 UTC	40	0.1600
15 July	1800 UTC	40	0.1600
16 July	0000 UTC	45	0.2025
16 July	0600 UTC	50	0.2500
16 July	1200 UTC	50	0.2500
16 July	1800 UTC	55	0.3025
17 July	0000 UTC	60	0.3600
17 July	0600 UTC	65	0.4225
17 July	1200 UTC	60	0.3600
17 July	1800 UTC	50	0.2500
18 July	0000 UTC	40	0.1600
18 July	0600 UTC	35	0.1225
18 July	1200 UTC	35	0.1225
Total			3.245

Fung-wong (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
25 July	0600 UTC	35	0.1225
25 July	1200 UTC	45	0.2025
25 July	1800 UTC	45	0.2025
26 July	0000 UTC	50	0.2500
26 July	0600 UTC	55	0.3025
26 July	1200 UTC	60	0.3600
26 July	1800 UTC	60	0.3600
27 July	0000 UTC	65	0.4225
27 July	0600 UTC	65	0.4225
27 July	1200 UTC	75	0.5625
27 July	1800 UTC	75	0.5625
28 July	0000 UTC	70	0.4900
28 July	0600 UTC	55	0.3025
28 July	1200 UTC	55	0.3025
28 July	1800 UTC	50	0.2500
29 July	0000 UTC	45	0.2025
29 July	0600 UTC	45	0.2025
Total			5.52

Kammuri (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
05 August	0000 UTC	35	0.1225
05 August	0600 UTC	40	0.1600
05 August	1200 UTC	40	0.1600
05 August	1800 UTC	45	0.2025
06 August	0000 UTC	50	0.2500
06 August	0600 UTC	50	0.2500
06 August	1200 UTC	45	0.2025
06 August	1800 UTC	40	0.1600
07 August	0000 UTC	40	0.1600
07 August	0600 UTC	40	0.1600
07 August	1200 UTC	35	0.1225
Total			1.95

Phanfone (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
10 August	0600 UTC	35	0.1225
10 August	1200 UTC	45	0.2025
10 August	1800 UTC	50	0.2500
11 August	0000 UTC	40	0.1600
Total			0.735

Vongfong (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
15 August	0600 UTC	35	0.1225
15 August	1200 UTC	35	0.1225
15 August	1800 UTC	40	0.1600
16 August	0000 UTC	45	0.2025
16 August	0600 UTC	50	0.2500
16 August	1200 UTC	50	0.2500
16 August	1800 UTC	50	0.2500
17 August	0000 UTC	50	0.2500
17 August	0600 UTC	50	0.2500
17 August	1200 UTC	50	0.2500
17 August	1800 UTC	50	0.2500
Total			1.8225

Nuri (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
17 August	1800 UTC	35	0.1225
18 August	0000 UTC	35	0.1225
18 August	0600 UTC	45	0.2025
18 August	1200 UTC	55	0.3025
18 August	1800 UTC	65	0.4225
19 August	0000 UTC	70	0.4900
19 August	0600 UTC	75	0.5625
19 August	1200 UTC	75	0.5625
19 August	1800 UTC	75	0.5625
20 August	0000 UTC	75	0.5625
20 August	0600 UTC	75	0.5625
20 August	1200 UTC	75	0.5625
20 August	1800 UTC	75	0.5625
21 August	0000 UTC	70	0.4900
21 August	0600 UTC	70	0.4900
21 August	1200 UTC	65	0.4225
21 August	1800 UTC	60	0.3600
22 August	0000 UTC	55	0.3025
22 August	0600 UTC	50	0.2500
22 August	1200 UTC	45	0.2025
22 August	1800 UTC	40	0.1600
Total			8.2775

Sinlaku (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
08 September	1800 UTC	35	0.1225
09 September	0000 UTC	45	0.2025
09 September	0600 UTC	55	0.3025
09 September	1200 UTC	65	0.4225
09 September	1800 UTC	70	0.4900
10 September	0000 UTC	80	0.6400
10 September	0600 UTC	90	0.8100
10 September	1200 UTC	100	1.0000
10 September	1800 UTC	100	1.0000
11 September	0000 UTC	100	1.0000
11 September	0600 UTC	100	1.0000
11 September	1200 UTC	100	1.0000
11 September	1800 UTC	95	0.9025
12 September	0000 UTC	95	0.9025
12 September	0600 UTC	95	0.9025
12 September	1200 UTC	90	0.8100
12 September	1800 UTC	90	0.8100
13 September	0000 UTC	90	0.8100
13 September	0600 UTC	90	0.8100
13 September	1200 UTC	90	0.8100
13 September	1800 UTC	80	0.6400
14 September	0000 UTC	65	0.4225
14 September	0600 UTC	60	0.3600
14 September	1200 UTC	60	0.3600
15 September	1800 UTC	55	0.3025
15 September	0000 UTC	50	0.2500
15 September	0600 UTC	50	0.2500
15 September	1200 UTC	50	0.2500
15 September	1800 UTC	50	0.2500
16 September	0000 UTC	45	0.2025
16 September	0600 UTC	40	0.1600
16 September	1200 UTC	40	0.1600
16 September	1800 UTC	40	0.1600
17 September	0000 UTC	45	0.2025
17 September	0600 UTC	45	0.2025
17 September	1200 UTC	50	0.2500
17 September	1800 UTC	50	0.2500
18 September	0000 UTC	50	0.2500
18 September	0600 UTC	60	0.3600
18 September	1200 UTC	60	0.3600
18 September	1800 UTC	60	0.3600
19 September	0000 UTC	65	0.4225
19 September	0600 UTC	65	0.4225
19 September	1200 UTC	65	0.4225
19 September	1800 UTC	65	0.4225
20 September	0000 UTC	55	0.3025
20 September	0600 UTC	55	0.3025
20 September	1200 UTC	50	0.2500
21 September	1800 UTC	45	0.2025
Total			23.4975

Hagupit (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
19 September	1200 UTC	35	0.1225
19 September	1800 UTC	45	0.2025
20 September	0000 UTC	50	0.2500
20 September	0600 UTC	50	0.2500
20 September	1200 UTC	50	0.2500
20 September	1800 UTC	50	0.2500
21 September	0000 UTC	55	0.3025
21 September	0600 UTC	55	0.3025
21 September	1200 UTC	65	0.4225
21 September	1800 UTC	70	0.4900
22 September	0000 UTC	75	0.5625
22 September	0600 UTC	80	0.6400
22 September	1200 UTC	80	0.6400
22 September	1800 UTC	80	0.6400
23 September	0000 UTC	85	0.7225
23 September	0600 UTC	85	0.7225
23 September	1200 UTC	85	0.7225
23 September	1800 UTC	90	0.8100
24 September	0000 UTC	75	0.5625
24 September	0600 UTC	60	0.3600
24 September	1200 UTC	45	0.2025
24 September	1800 UTC	35	0.1225
Total			9.55

Jangmi (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
24 September	1200 UTC	35	0.1225
24 September	1800 UTC	45	0.2025
25 September	0000 UTC	55	0.3025
25 September	0600 UTC	65	0.4225
25 September	1200 UTC	70	0.4900
25 September	1800 UTC	75	0.5625
26 September	0000 UTC	80	0.6400
26 September	0600 UTC	85	0.7225
26 September	1200 UTC	95	0.8100
26 September	1800 UTC	100	1.0000
27 September	0000 UTC	105	1.1025
27 September	0600 UTC	110	1.2100
27 September	1200 UTC	115	1.3225
27 September	1800 UTC	115	1.3225
28 September	0000 UTC	110	1.2100
28 September	0600 UTC	100	1.0000
28 September	1200 UTC	85	0.7225
28 September	1800 UTC	65	0.4225
29 September	0000 UTC	50	0.2500
29 September	0600 UTC	50	0.2500
29 September	1200 UTC	45	0.2025
29 September	1800 UTC	45	0.2025
30 September	0000 UTC	45	0.2025
30 September	0600 UTC	40	0.1600
30 September	1200 UTC	35	0.1225
30 September	1800 UTC	35	0.1225
Total			15.1

Mekkhala (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
29 September	0000 UTC	35	0.1225
29 September	0600 UTC	40	0.1600
29 September	1200 UTC	40	0.1600
29 September	1800 UTC	45	0.2025
30 September	0000 UTC	45	0.2025
30 September	0600 UTC	35	0.1225
Total			0.97

Higos (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
02 October	0000 UTC	35	0.1225
02 October	0600 UTC	35	0.1225
02 October	1200 UTC	35	0.1225
02 October	1800 UTC	35	0.1225
03 October	0000 UTC	35	0.1225
Total			0.6125

Bavi (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
19 October	0600 UTC	35	0.1225
19 October	1200 UTC	40	0.1600
19 October	1800 UTC	45	0.2025
20 October	0000 UTC	45	0.2025
20 October	0600 UTC	45	0.2025
Total			0.6125

Maysak (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
07 November	0600 UTC	35	0.1225
07 November	1200 UTC	35	0.1225
07 November	1800 UTC	40	0.1600
08 November	0000 UTC	45	0.2025
08 November	0600 UTC	45	0.2025
08 November	1200 UTC	50	0.2500
08 November	1800 UTC	50	0.2500
09 November	0000 UTC	50	0.2500
09 November	0600 UTC	45	0.2025
Total			1.7625

Haishen (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
15 November	1800 UTC	35	0.1225
16 November	0000 UTC	40	0.1600
16 November	0600 UTC	40	0.1600
16 November	1200 UTC	35	0.1225
16 November	1800 UTC	35	0.1225
17 November	0000 UTC	35	0.1225
17 November	0600 UTC	35	0.1225
Total			0.9325

Noul (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
16 November	1200 UTC	35	0.1225
16 November	1800 UTC	35	0.1225
17 November	0000 UTC	40	0.1600
17 November	0600 UTC	35	0.1225
Total			0.5275

Dolphin (Best Track)

Date	Time	Maximum Sustained Winds (kt)	ACE (104 kt2)
12 December	1800 UTC	35	0.1225
13 December	0000 UTC	35	0.1225
13 December	0600 UTC	40	0.1600
13 December	1200 UTC	40	0.1600
13 December	1800 UTC	45	0.2025
14 December	0000 UTC	45	0.2025
14 December	0600 UTC	45	0.2025
14 December	1200 UTC	50	0.2500
14 December	1800 UTC	50	0.2500
15 December	0000 UTC	55	0.3025
15 December	0600 UTC	55	0.3025
15 December	1200 UTC	60	0.3600
15 December	1800 UTC	65	0.4225
16 December	0000 UTC	65	0.4225
16 December	0600 UTC	65	0.4225
16 December	1200 UTC	60	0.3600
16 December	1800 UTC	55	0.3025
17 December	0000 UTC	50	0.2500
17 December	0600 UTC	45	0.2025
17 December	1200 UTC	40	0.1600
17 December	1800 UTC	40	0.1600
18 December	0000 UTC	35	0.1225
18 December	0600 UTC	35	0.1225
Total			5.585

Season total

Storm	Type	ACE (104 kt2)
0801 Neoguri	Best Track	7.2325
0802 Rammasun	Best Track	12.0125
0803 Matmo	Best Track	1.0975
0804 Halong	Best Track	3.8075
0805 Nakri	Best Track	15.64
0806 Fengshen	Best Track	9.6125
0807 Kalmaegi	Best Track	3.245
0808 Fung-wong	Best Track	5.52
0809 Kammuri	Best Track	1.95
0810 Phanfone	Best Track	0.735
0811 Vongfong	Best Track	1.8225
0812 Nuri	Best Track	8.2775
0813 Sinlaku	Best Track	23.4975
0814 Hagupit	Best Track	9.55
0815 Jangmi	Best Track	15.1
0816 Mekkhala	Best Track	0.97
0817 Higos	Best Track	0.6125
0818 Bavi	Best Track	0.6125
0819 Maysak	Best Track	1.7625
0820 Haishen	Best Track	0.9325
0821 Noul	Best Track	0.5275
0822 Dolphin	Best Track	5.585
Total		130.1025