2014: ACE - ATL = 65.1 EPAC = 182.25 WPAC =273.577

[xtyphooncyclonex]

Vongfong now accounts for 42.345 units of ACE, but this is not yet it. It has at least 24 hours to go until it is finished. Highest per storm ACE since Megi 2010. This means that the WPAC ACE is currently 212.4775.

[Alyono]

Atlantic will be getting a boost of its own thanks to Gonzalo

[somethingfunny]

Looks like we will be crossing that 50 ACE threshold after all.

[Alyono]

probably will be crossing the 60 threshold as well. With the likely Gulf system next week, the 70 threshold may also be crossed.

This may end up as a near normal season afterall

[Steve820]

This year's Atlantic season already has a higher ACE then that of last year, and it's all because of the MUCH more interesting systems than last year. I remember how laughable 2013 was; all we had was 2 minor C1 hurricanes and the rest extreme fails and dump systems.

[cycloneye]

With the 0300z data the Atlantic reaches and surpass the 50 mark.

50.9825

[Alyono]

I believe we are close to 54 now

this season may well end at near normal levels of activity, mostly due to Gonzalo

[tatertawt24]

Even if ATL ends up with less storms than 2013, this year was way more interesting. Arthur was the strongest landfall since Ike and Gonzalo was imo the most impressive storm since Igor. (Ophelia 2011 was boring )

[cycloneye]

Impressive performance by Gonzalo that has turned the Atlantic more normal that what was expected and it has a few more advisories to rack up some more ACE units.It has gained 14.96 units and now the North Atlantic goes up to 54.3275.

[galaxy401]

What is the normal ACE level for the Atlantic?

(Ophelia 2011 was boring )

Not really. Ophelia was only forecast to become a category 1 hurricane and this was after the storm struggled in a hostile environment.

[Ptarmigan]

Latest Atlantic ACE is 63.235. That is 9 ACE/Storm, which is within average. Percentage of storms that become hurricane for 2014 is 85.7%, which is in the top 5 since 1870.

Top 5 Percentage Of Storms Become Hurricanes (1870-2014)
1884 100%
1870 90.9%
1896/1952/2014 85.7%
1950 84.6%
1875/1878/1886/1893/1915/1977 83.3%

2014 ranks right up there with 1950 and 1952.

Bottom 5 Percentage Of Storms Become Hurricanes (1870-2014)
1907/1914 0%
2013 14.3%
1905 20.0%
1931 23.1%
1925 25.0%

2013 had the lowest percentage of storms becoming hurricanes. It is the lowest since 1950. 2013 was below average in terms of ACE and ACE/Storm. In fact 2013 had the lowest ACE/Storm since 1950.

Lowest ACE/Storm (1870-2014)
1925 1.8
1907/2013 2.6
1914 4.0
1931/1934/1946 3.7
1970 4.0

Any data before 1950 should be taken with a grain of salt. Let's use 1950 to 2014.

Top 5 Percentage Of Storms Become Hurricanes (1950-2014)
1952/2014 85.7%
1950 84.6%
1977 83.3%
1980 81.8%
1951 80.0%

1952 and 2014 have the most storms becoming hurricanes. Interesting to note that 1977 had a percentage of storms becoming hurricanes like 2014.

Bottom 5 Percentage Of Storms Become Hurricanes (1950-2014)
2013 14.3%
1982/2002/2009 33.3%
1974 36.4%
2011 36.8%
1957/1997 37.5%

2013 has the lowest period since 1950. 1907 and 1914 happened before satellites, so the data is dubious. Those seasons with low percentage of storms becoming hurricanes happened in El Nino season with exception of 1974, 2011, and 2013. 1974 came off of a strong La Nina.

Lowest ACE/Storm (1950-2014)
2013 2.6
1970 4.0
1977 4.2
1983 4.3
1991 4.5

Again. 2013 has the lowest ACE/Storm since 1950. Even lower than 1977 and 1983.

[cycloneye]

With Gonzalo last advisory being released at 5 PM EDT it got big ACE units that has helped the North Atlantic season by like a normal one. The ACE for Gonzalo closes preliminary at 26.7625 and the North Atlantic got to 66.5725.

[Hammy]

Question to the pro mets here: last year's ACE being 36, is there a good shot of it being double that this year considering it's already over 66?

[TropicalAnalystwx13]

Accumulated Cyclone Energy in the Atlantic basin during the month of October totaled 28.9575 units, higher than the August-September combined total of 28.6925. This is the first such occurrence since 1963.*

As it stands, and I don't expect too much change going forward, 2014 has the 16th lowest ACE index going back to 1950 (when reliable ACE records began). That's much better than 2013's 36 units, the 8th lowest going back to 1950, but below the 1951-2000 average of 93 units, and far below the 1995-2013 (+AMO era) average of 141 units.

* Thanks to Phil Klotzbach for this stat

[xtyphooncyclonex]

Western N Pacific 235.125
Eastern N Pacific 196.2655

[euro6208]

Could get a big boost in ACE from future Hagupit.

We are just 82% of normal

current 240.94
normal YTD 292

[euro6208]

WPAC ACE at 271.163 or about 91% normal...Normal YTD is 297..

2014 beats out 2013 with more ACE...

2013 ended with 271 despite having a record monster in haiyan but 2014 featured 3 out of 4 storms in Oct, Nov, and Dec to peak at 155 knots...

WPAC in it's own league...

[dexterlabio]

But 2013 had more tropical cyclones in WPAC than 2014. It's a quality-over-quantity typhoon season, just like the Atlantic this year. Also this year's typhoon season is quite similar with last year, having the peak boost in activity during the last quarter of the year (this year had 4 super typhoons since Phanfone).


EPAC though has both "quality" hurricanes and a high number of storms.

[euro6208]

WPAC ACE at 273.988 or almost half of the northern hemisphere ACE thanks to Jangmi which contributed 1.05...

Below the climo of 302...