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Talk:2011 Pacific typhoon season/ACE calcs

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This is the page for calculating the Accumulated Cyclone Energy for the 2011 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. [1]

where vmax is estimated sustained wind speed in knots.

Aere (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
07 May 1200 UTC 35 0.1225
07 May 1800 UTC 35 0.1225
08 May 0000 UTC 35 0.1225
08 May 0600 UTC 35 0.1225
08 May 1200 UTC 40 0.1600
08 May 1800 UTC 40 0.1600
09 May 0000 UTC 40 0.1600
09 May 0600 UTC 35 0.1225
09 May 1200 UTC 35 0.1225
09 May 1800 UTC 35 0.1225
10 May 0000 UTC 35 0.1225
10 May 0600 UTC 35 0.1225
10 May 1200 UTC 35 0.1225
10 May 1800 UTC 35 0.1225
11 May 0000 UTC 35 0.1225
11 May 0600 UTC 35 0.1225
11 May 1200 UTC 35 0.1225
Total   2.1950


Songda (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
21 May 1200 UTC 35 0.1225
21 May 1800 UTC 35 0.1225
22 May 0000 UTC 40 0.1600
22 May 0600 UTC 45 0.2025
22 May 1200 UTC 50 0.2500
22 May 1800 UTC 50 0.2500
23 May 0000 UTC 50 0.2500
23 May 0600 UTC 50 0.2500
23 May 1200 UTC 55 0.3025
23 May 1800 UTC 55 0.3025
24 May 0000 UTC 55 0.3025
24 May 0600 UTC 60 0.3600
24 May 1200 UTC 60 0.3600
24 May 1800 UTC 65 0.4225
25 May 0000 UTC 70 0.4900
25 May 0600 UTC 75 0.5625
25 May 1200 UTC 85 0.7225
25 May 1800 UTC 95 0.9025
26 May 0000 UTC 100 1.0000
26 May 0600 UTC 105 1.1025
26 May 1200 UTC 105 1.1025
26 May 1800 UTC 105 1.1025
27 May 0000 UTC 105 1.1025
27 May 0600 UTC 100 1.0000
27 May 1200 UTC 95 0.9025
27 May 1800 UTC 90 0.8100
28 May 0000 UTC 90 0.8100
28 May 0600 UTC 90 0.8100
28 May 1200 UTC 80 0.6400
28 May 1800 UTC 70 0.4900
29 May 0000 UTC 60 0.3600
Total   17.5675


Sarika (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
09 June 1200 UTC 35 0.1225
09 June 1800 UTC 40 0.1600
10 June 0000 UTC 40 0.1600
10 June 0600 UTC 40 0.1600
10 June 1200 UTC 35 0.1225
10 June 1800 UTC 35 0.1225
11 June 0000 UTC 35 0.1225
Total   0.9700


Haima (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
21 June 1200 UTC 35 0.1225
21 June 1800 UTC 35 0.1225
22 June 0000 UTC 35 0.1225
22 June 0600 UTC 35 0.1225
22 June 1200 UTC 40 0.1600
22 June 1800 UTC 40 0.1600
23 June 0000 UTC 40 0.1600
23 June 0600 UTC 40 0.1600
23 June 1200 UTC 35 0.1225
23 June 1800 UTC 35 0.1225
24 June 0000 UTC 40 0.1600
24 June 0600 UTC 40 0.1600
24 June 1200 UTC 35 0.1225
Total   1.8175


Meari (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
22 June 0000 UTC 35 0.1225
22 June 0600 UTC 35 0.1225
22 June 1200 UTC 40 0.1600
22 June 1800 UTC 45 0.2025
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 55 0.3025
24 June 0600 UTC 55 0.3025
24 June 1200 UTC 60 0.3600
24 June 1800 UTC 60 0.3600
25 June 0000 UTC 60 0.3600
25 June 0600 UTC 60 0.3600
25 June 1200 UTC 55 0.3025
25 June 1800 UTC 55 0.3025
26 June 0000 UTC 55 0.3025
26 June 0600 UTC 55 0.3025
26 June 1200 UTC 55 0.3025
26 June 1800 UTC 50 0.2500
27 June 0000 UTC 45 0.2025
Total   5.6175


Ma-on (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
12 July 0000 UTC 35 0.1225
12 July 0600 UTC 35 0.1225
12 July 1200 UTC 40 0.1600
12 July 1800 UTC 45 0.2025
13 July 0000 UTC 50 0.2500
13 July 0600 UTC 50 0.2500
13 July 1200 UTC 55 0.3025
13 July 1800 UTC 60 0.3600
14 July 0000 UTC 65 0.4225
14 July 0600 UTC 65 0.4225
14 July 1200 UTC 75 0.5625
14 July 1800 UTC 75 0.5625
15 July 0000 UTC 80 0.6400
15 July 0600 UTC 80 0.6400
15 July 1200 UTC 85 0.7225
15 July 1800 UTC 85 0.7225
16 July 0000 UTC 85 0.7225
16 July 0600 UTC 95 0.9025
16 July 1200 UTC 95 0.9025
16 July 1800 UTC 95 0.9025
17 July 0000 UTC 95 0.9025
17 July 0600 UTC 85 0.7225
17 July 1200 UTC 85 0.7225
17 July 1800 UTC 80 0.6400
18 July 0000 UTC 80 0.6400
18 July 0600 UTC 75 0.5625
18 July 1200 UTC 75 0.5625
18 July 1800 UTC 75 0.5625
19 July 0000 UTC 75 0.5625
19 July 0600 UTC 75 0.5625
19 July 1200 UTC 75 0.5625
19 July 1800 UTC 65 0.4225
20 July 0000 UTC 55 0.3025
20 July 0600 UTC 55 0.3025
20 July 1200 UTC 50 0.2500
20 July 1800 UTC 50 0.2500
21 July 0000 UTC 45 0.2025
21 July 0600 UTC 45 0.2025
21 July 1200 UTC 45 0.2025
21 July 1800 UTC 45 0.2025
22 July 0000 UTC 45 0.2025
22 July 0600 UTC 45 0.2025
22 July 1200 UTC 45 0.2025
22 July 1800 UTC 45 0.2025
23 July 0000 UTC 45 0.2025
23 July 0600 UTC 45 0.2025
23 July 1200 UTC 45 0.2025
23 July 1800 UTC 45 0.2025
24 July 0000 UTC 45 0.2025
24 July 0600 UTC 45 0.2025
Total   21.2600


Tokage (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
15 July 0000 UTC 35 0.1225
15 July 0600 UTC 35 0.1225
15 July 1200 UTC 35 0.1225
Total   0.3675


Nock-ten (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
26 July 0000 UTC 35 0.1225
26 July 0600 UTC 40 0.1600
26 July 1200 UTC 45 0.2025
26 July 1800 UTC 45 0.2025
27 July 0000 UTC 45 0.2025
27 July 0600 UTC 45 0.2025
27 July 1200 UTC 45 0.2025
27 July 1800 UTC 45 0.2025
28 July 0000 UTC 45 0.2025
28 July 0600 UTC 50 0.2500
28 July 1200 UTC 50 0.2500
28 July 1800 UTC 50 0.2500
29 July 0000 UTC 50 0.2500
29 July 0600 UTC 50 0.2500
29 July 1200 UTC 50 0.2500
29 July 1800 UTC 50 0.2500
30 July 0000 UTC 50 0.2500
30 July 0600 UTC 45 0.2025
30 July 1200 UTC 40 0.1600
30 July 1800 UTC 35 0.1225
Total   4.1850


Muifa (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
28 July 0600 UTC 35 0.1225
28 July 1200 UTC 40 0.1600
28 July 1800 UTC 45 0.2025
29 July 0000 UTC 45 0.2025
29 July 0600 UTC 45 0.2025
29 July 1200 UTC 50 0.2500
29 July 1800 UTC 60 0.3600
30 July 0000 UTC 65 0.4225
30 July 0600 UTC 75 0.5625
30 July 1200 UTC 90 0.8100
30 July 1800 UTC 95 0.9025
31 July 0000 UTC 95 0.9025
31 July 0600 UTC 95 0.9025
31 July 1200 UTC 95 0.9025
31 July 1800 UTC 95 0.9025
01 August 0000 UTC 90 0.8100
01 August 0600 UTC 85 0.7225
01 August 1200 UTC 85 0.7225
01 August 1800 UTC 85 0.7225
02 August 0000 UTC 85 0.7225
02 August 0600 UTC 85 0.7225
02 August 1200 UTC 85 0.7225
02 August 1800 UTC 85 0.7225
03 August 0000 UTC 85 0.7225
03 August 0600 UTC 85 0.7225
03 August 1200 UTC 85 0.7225
03 August 1800 UTC 85 0.7225
04 August 0000 UTC 85 0.7225
04 August 0600 UTC 85 0.7225
04 August 1200 UTC 85 0.7225
04 August 1800 UTC 85 0.7225
05 August 0000 UTC 85 0.7225
05 August 0600 UTC 85 0.7225
05 August 1200 UTC 80 0.6400
05 August 1800 UTC 80 0.6400
06 August 0000 UTC 75 0.5625
06 August 0600 UTC 70 0.4900
06 August 1200 UTC 65 0.4225
06 August 1800 UTC 65 0.4225
07 August 0000 UTC 65 0.4225
07 August 0600 UTC 60 0.3600
07 August 1200 UTC 60 0.3600
07 August 1800 UTC 55 0.3025
08 August 0000 UTC 55 0.3025
08 August 0600 UTC 50 0.2500
08 August 1200 UTC 40 0.1600
08 August 1800 UTC 35 0.1225
Total   26.3575


Merbok (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
03 August 0600 UTC 35 0.1225
03 August 1200 UTC 35 0.1225
03 August 1800 UTC 35 0.1225
04 August 0000 UTC 35 0.1225
04 August 0600 UTC 35 0.1225
04 August 1200 UTC 35 0.1225
04 August 1800 UTC 35 0.1225
05 August 0000 UTC 40 0.1600
05 August 0600 UTC 45 0.2025
05 August 1200 UTC 45 0.2025
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 50 0.2500
06 August 1800 UTC 50 0.2500
07 August 0000 UTC 50 0.2500
07 August 0600 UTC 50 0.2500
07 August 1200 UTC 50 0.2500
07 August 1800 UTC 50 0.2500
08 August 0000 UTC 50 0.2500
08 August 0600 UTC 50 0.2500
08 August 1200 UTC 50 0.2500
08 August 1800 UTC 50 0.2500
09 August 0000 UTC 50 0.2500
09 August 0600 UTC 45 0.2025
09 August 1200 UTC 45 0.2025
Total   5.28


Nanmadol (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
23 August 1200 UTC 35 0.1225
23 August 1800 UTC 40 0.1600
24 August 0000 UTC 45 0.2025
24 August 0600 UTC 50 0.2500
24 August 1200 UTC 55 0.3025
24 August 1800 UTC 60 0.3600
25 August 0000 UTC 65 0.4225
25 August 0600 UTC 75 0.5625
25 August 1200 UTC 80 0.6400
25 August 1800 UTC 90 0.8100
26 August 0000 UTC 100 1.0000
26 August 0600 UTC 100 1.0000
26 August 1200 UTC 100 1.0000
26 August 1800 UTC 95 0.9025
27 August 0000 UTC 90 0.8100
27 August 0600 UTC 85 0.7225
27 August 1200 UTC 80 0.6400
27 August 1800 UTC 70 0.4900
28 August 0000 UTC 65 0.4225
28 August 0600 UTC 65 0.4225
28 August 1200 UTC 60 0.3600
28 August 1800 UTC 60 0.3600
29 August 0000 UTC 55 0.3025
29 August 0600 UTC 50 0.2500
29 August 1200 UTC 50 0.2500
29 August 1800 UTC 45 0.2025
30 August 0000 UTC 45 0.2025
30 August 0600 UTC 40 0.1600
30 August 1200 UTC 40 0.1600
30 August 1800 UTC 35 0.1225
Total   13.6125


Talas (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
25 August 0000 UTC 35 0.1225
25 August 0600 UTC 35 0.1225
25 August 1200 UTC 40 0.1600
25 August 1800 UTC 40 0.1600
26 August 0000 UTC 45 0.2025
26 August 0600 UTC 45 0.2025
26 August 1200 UTC 45 0.2025
26 August 1800 UTC 45 0.2025
27 August 0000 UTC 45 0.2025
27 August 0600 UTC 45 0.2025
27 August 1200 UTC 50 0.2500
27 August 1800 UTC 50 0.2500
28 August 0000 UTC 50 0.2500
28 August 0600 UTC 50 0.2500
28 August 1200 UTC 50 0.2500
28 August 1800 UTC 50 0.2500
29 August 0000 UTC 50 0.2500
29 August 0600 UTC 50 0.2500
29 August 1200 UTC 50 0.2500
29 August 1800 UTC 50 0.2500
30 August 0000 UTC 50 0.2500
30 August 0600 UTC 50 0.2500
30 August 1200 UTC 50 0.2500
30 August 1800 UTC 50 0.2500
31 August 0000 UTC 50 0.2500
31 August 0600 UTC 50 0.2500
31 August 1200 UTC 50 0.2500
31 August 1800 UTC 50 0.2500
01 September 0000 UTC 50 0.2500
01 September 0600 UTC 50 0.2500
01 September 1200 UTC 50 0.2500
01 September 1800 UTC 50 0.2500
02 September 0000 UTC 50 0.2500
02 September 0600 UTC 50 0.2500
02 September 1200 UTC 50 0.2500
02 September 1800 UTC 50 0.2500
03 September 0000 UTC 50 0.2500
03 September 0600 UTC 50 0.2500
03 September 1200 UTC 45 0.2025
03 September 1800 UTC 45 0.2025
04 September 0000 UTC 40 0.1600
04 September 0600 UTC 40 0.1600
04 September 1200 UTC 40 0.1600
04 September 1800 UTC 40 0.1600
05 September 0000 UTC 40 0.1600
Total   9.985


Noru (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
03 September 1200 UTC 35 0.1225
03 September 1800 UTC 40 0.1600
04 September 0000 UTC 40 0.1600
04 September 0600 UTC 40 0.1600
04 September 1200 UTC 40 0.1600
04 September 1800 UTC 40 0.1600
05 September 0000 UTC 40 0.1600
05 September 0600 UTC 40 0.1600
05 September 1200 UTC 40 0.1600
05 September 1800 UTC 40 0.1600
06 September 0000 UTC 40 0.1600
06 September 0600 UTC 40 0.1600
Total   1.8825


Kulap (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
07 September 0000 UTC 35 0.1225
07 September 0600 UTC 35 0.1225
07 September 1200 UTC 35 0.1225
07 September 1800 UTC 35 0.1225
08 September 0000 UTC 35 0.1225
08 September 0600 UTC 35 0.1225
08 September 1200 UTC 35 0.1225
08 September 1800 UTC 35 0.1225
Total   0.98


Roke (Best Track)

[edit]
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 35 0.1225
14 September 1800 UTC 35 0.1225
15 September 0000 UTC 35 0.1225
15 September 0600 UTC 40 0.1600
15 September 1200 UTC 40 0.1600
15 September 1800 UTC 40 0.1600
16 September 0000 UTC 40 0.1600
16 September 0600 UTC 45 0.2025
16 September 1200 UTC 45 0.2025
16 September 1800 UTC 45 0.2025
17 September 0000 UTC 45 0.2025
17 September 0600 UTC 50 0.2500
17 September 1200 UTC 55 0.3025
17 September 1800 UTC 60 0.3600
18 September 0000 UTC 60 0.3600
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 60 0.3600
19 September 0600 UTC 60 0.3600
19 September 1200 UTC 65 0.4225
19 September 1800 UTC 70 0.4900
20 September 0000 UTC 75 0.5625
20 September 0600 UTC 80 0.6400
20 September 1200 UTC 85 0.7225
20 September 1800 UTC 85 0.7225
21 September 0000 UTC 80 0.6400
21 September 0600 UTC 75 0.5625
21 September 1200 UTC 65 0.4225
21 September 1800 UTC 65 0.4225
22 September 0000 UTC 60 0.3600
Total   11.47


Sonca (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
15 September 0600 UTC 35 0.1225
15 September 1200 UTC 35 0.1225
15 September 1800 UTC 35 0.1225
16 September 0000 UTC 40 0.1600
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 50 0.2500
17 September 1200 UTC 55 0.3025
17 September 1800 UTC 55 0.3025
18 September 0000 UTC 60 0.3600
18 September 0600 UTC 65 0.4225
18 September 1200 UTC 65 0.4225
18 September 1800 UTC 65 0.4225
19 September 0000 UTC 70 0.4900
19 September 0600 UTC 70 0.4900
19 September 1200 UTC 70 0.4900
19 September 1800 UTC 70 0.4900
20 September 0000 UTC 65 0.4225
20 September 0600 UTC 60 0.3600
Total   6.435


Nesat (Best Track)

[edit]
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 40 0.1600
24 September 1800 UTC 45 0.2025
25 September 0000 UTC 50 0.2500
25 September 0600 UTC 50 0.2500
25 September 1200 UTC 55 0.3025
25 September 1800 UTC 60 0.3600
26 September 0000 UTC 70 0.4900
26 September 0600 UTC 70 0.4900
26 September 1200 UTC 75 0.5625
26 September 1800 UTC 80 0.6400
27 September 0000 UTC 75 0.5625
27 September 0600 UTC 65 0.4225
27 September 1200 UTC 65 0.4225
27 September 1800 UTC 65 0.4225
28 September 0000 UTC 65 0.4225
28 September 0600 UTC 65 0.4225
28 September 1200 UTC 65 0.4225
28 September 1800 UTC 65 0.4225
29 September 0000 UTC 65 0.4225
29 September 0600 UTC 65 0.4225
29 September 1200 UTC 65 0.4225
29 September 1800 UTC 55 0.3025
30 September 0000 UTC 50 0.2500
30 September 0600 UTC 45 0.2025
30 September 1200 UTC 35 0.1225
Total   9.6175


Haitang (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
25 September 0000 UTC 35 0.1225
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 35 0.1225
26 September 0600 UTC 35 0.1225
26 September 1200 UTC 35 0.1225
Total   0.8575


Nalgae (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
27 September 1800 UTC 35 0.1225
28 September 0000 UTC 40 0.1600
28 September 0600 UTC 45 0.2025
28 September 1200 UTC 50 0.2500
28 September 1800 UTC 55 0.3025
29 September 0000 UTC 60 0.3600
29 September 0600 UTC 65 0.4225
29 September 1200 UTC 75 0.5625
29 September 1800 UTC 80 0.6400
30 September 0000 UTC 80 0.6400
30 September 0600 UTC 85 0.7225
30 September 1200 UTC 90 0.8100
30 September 1800 UTC 90 0.8100
01 October 0000 UTC 95 0.9025
01 October 0600 UTC 85 0.7225
01 October 1200 UTC 75 0.5625
01 October 1800 UTC 70 0.4900
02 October 0000 UTC 65 0.4225
02 October 0600 UTC 60 0.3600
02 October 1200 UTC 55 0.3025
02 October 1800 UTC 50 0.2500
03 October 0000 UTC 50 0.2500
03 October 0600 UTC 50 0.2500
03 October 1200 UTC 50 0.2500
03 October 1800 UTC 45 0.2025
04 October 0000 UTC 45 0.2025
04 October 0600 UTC 40 0.1600
04 October 1200 UTC 35 0.1225
Total   11.455


Banyan (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
10 October 1800 UTC 35 0.1225
11 October 0000 UTC 35 0.1225
Total   0.245


Washi (Best Track)

[edit]
Date Time Maximum Sustained Winds (kt) ACE (104 kt2)
15 December 0600 UTC 35 0.1225
15 December 1200 UTC 40 0.1600
15 December 1800 UTC 40 0.1600
16 December 0000 UTC 45 0.2025
16 December 0600 UTC 50 0.2500
16 December 1200 UTC 40 0.1600
16 December 1800 UTC 35 0.1225
17 December 0000 UTC 40 0.1600
17 December 0600 UTC 40 0.1600
17 December 1200 UTC 40 0.1600
17 December 1800 UTC 35 0.1225
18 December 0000 UTC 35 0.1225
18 December 0600 UTC 35 0.1225
18 December 1200 UTC 35 0.1225
18 December 1800 UTC 35 0.1225
Total   2.27


Season total

[edit]
StormTypeACE (104 kt2)
1101 Aere Best Track 2.1950
1102 Songda Best Track 17.5675
1103 Sarika Best Track 0.9700
1104 Haima Best Track 1.8175
1105 Meari Best Track 5.6175
1106 Ma-on Best Track 21.2600
1107 Tokage Best Track 0.3675
1108 Nock-ten Best Track 4.1850
1109 Muifa Best Track 26.3575
1110 Merbok Best Track 5.2800
1111 Nanmadol Best Track 13.6125
1112 Talas Best Track 9.9850
1113 Noru Best Track 1.8825
1114 Kulap Best Track 0.9800
1115 Roke Best Track 11.4700
1116 Sonca Best Track 6.4350
1117 Nesat Best Track 9.6175
1118 Haitang Best Track 0.8575
1119 Nalgae Best Track 11.4550
1120 Banyan Best Track 0.2450
1121 Washi Best Track 2.2700
Total154.4275