2017 ACE: NATL - 226.0 | EPAC - 98.2 | WPAC - 154.5 | NIO - 16.1

[cycloneye]

Irma will pass Harvey in ACE later today.

Atlantic Accumulated Cyclone Energy
Name System ACE Max Intensity
------------------ ------------ ---------------
Arlene (01L) [TCR] 0.81 45
Bret (02L) 0.6875 40
Cindy (03L) 1.55 50
Four (04L) 0 25
Don (05L) 0.6875 40
Emily (06L) 0.405 45
Franklin (07L) 3.685 75
Gert (08L) 7.2675 90
Harvey (09L) 11.1225 115
Irma (11L) 9.525 100

Season Total 35.74

Wow,she is going to go in a sprint.

[WeatherGuesser]

EPAC back in the lead over the West. Go EPAC !

[cycloneye]

@philklotzbach
The 2017 Atlantic hurricane season has now generated more Accumulated Cyclone Energy than the entire 2013 Atlantic hurricane season. #Irma

 https://twitter.com/philklotzbach/status/904087221375983616

[Kingarabian]

EPAC back in the lead over the West. Go EPAC !

Squad.

[1900hurricane]

EPAC back in the lead over the West. Go EPAC !

That doesn't make sense though because the WPac has had two active storms, Sanvu and Mawar, while the EPac has had only Lidia. Sanvu alone has been longer lasting and more intense than Lidia, so the WPac lead should have increased. I have the WPac at 92.5125 and the EPac at 86.225 as of 18Z September 2nd.

[euro6208]

Something wrong with that site from Maue. After the storm dies, it suddenly gets much lower ACE than what it got operationally.

[euro6208]

EPAC back in the lead over the West. Go EPAC !

That doesn't make sense though because the WPac has had two active storms, Sanvu and Mawar, while the EPac has had only Lidia. Sanvu alone has been longer lasting and more intense than Lidia, so the WPac lead should have increased. I have the WPac at 92.5125 and the EPac at 86.225 as of 18Z September 2nd.

Yup and Mawar is still active and about to make landfall now.

How many times has the EPAC and Atlantic beaten the WPAC?

[1900hurricane]

The North Atlantic has beaten the Western Pacific three times I believe, in 1998, 1999, and 2010. I don't think the Eastern Pacific has ever done so. Most of the exceptionally active Eastern Pacific years have also been active Western Pacific years.

[RL3AO]

No change for Calvin in the TCR.

Accumulated Cyclone Energy for Calvin
Date Intensity Type 6-hr ACE Total ACE
---------------- ----------- ------------------- ---------- -----------
2017 JUN 11 1200 30 Tropical Depression 0 0
2017 JUN 11 1800 30 Tropical Depression 0 0
2017 JUN 12 0000 30 Tropical Depression 0 0
2017 JUN 12 0600 30 Tropical Depression 0 0
2017 JUN 12 1200 30 Tropical Depression 0 0
2017 JUN 12 1800 35 Tropical Storm 0.1225 0.1225
2017 JUN 13 0000 35 Tropical Storm 0.1225 0.245
2017 JUN 13 0600 30 Tropical Depression 0 0.245

Operational ACE: 0.245
TCR ACE: 0.245

[1900hurricane]

No change for Calvin in the TCR.

Accumulated Cyclone Energy for Calvin
Date Intensity Type 6-hr ACE Total ACE
---------------- ----------- ------------------- ---------- -----------
2017 JUN 11 1200 30 Tropical Depression 0 0
2017 JUN 11 1800 30 Tropical Depression 0 0
2017 JUN 12 0000 30 Tropical Depression 0 0
2017 JUN 12 0600 30 Tropical Depression 0 0
2017 JUN 12 1200 30 Tropical Depression 0 0
2017 JUN 12 1800 35 Tropical Storm 0.1225 0.1225
2017 JUN 13 0000 35 Tropical Storm 0.1225 0.245
2017 JUN 13 0600 30 Tropical Depression 0 0.245

Operational ACE: 0.245
TCR ACE: 0.245

I wouldn't say that. Looks like peak/landfall intensity got bumped up to 40 kt.

[galaxy401]

The North Atlantic has beaten the Western Pacific three times I believe, in 1998, 1999, and 2010. I don't think the Eastern Pacific has ever done so. Most of the exceptionally active Eastern Pacific years have also been active Western Pacific years.

Didn't the Atlantic also beat the WPAC in 2005 too?

[1900hurricane]

The North Atlantic has beaten the Western Pacific three times I believe, in 1998, 1999, and 2010. I don't think the Eastern Pacific has ever done so. Most of the exceptionally active Eastern Pacific years have also been active Western Pacific years.

Didn't the Atlantic also beat the WPAC in 2005 too?

Nope, the WPac had a near average season that year with 308.8175 ACE. WPac ACE average is ~300 units, so it takes some significant deviations for it to not come on top. 1998, 1999, and 2010 all featured both hyperactive NAtl seasons and some of the quietest WPac seasons on record. 2004 was one of the most active NAtl seasons on record when using ACE with 224.7975 units, but an active WPac that year more than doubled it (475.855).

[WeatherGuesser]

No change for Calvin in the TCR.

Accumulated Cyclone Energy for Calvin
Date Intensity Type 6-hr ACE Total ACE
---------------- ----------- ------------------- ---------- -----------
2017 JUN 11 1200 30 Tropical Depression 0 0
2017 JUN 11 1800 30 Tropical Depression 0 0
2017 JUN 12 0000 30 Tropical Depression 0 0
2017 JUN 12 0600 30 Tropical Depression 0 0
2017 JUN 12 1200 30 Tropical Depression 0 0
2017 JUN 12 1800 35 Tropical Storm 0.1225 0.1225
2017 JUN 13 0000 35 Tropical Storm 0.1225 0.245
2017 JUN 13 0600 30 Tropical Depression 0 0.245

Operational ACE: 0.245
TCR ACE: 0.245

I wouldn't say that. Looks like peak/landfall intensity got bumped up to 40 kt.

This is the ACE thread and the ACE did not change.

[RL3AO]

This is the ACE thread and the ACE did not change.

It did. It's just the best track data file with the TCR didn't update like it did for Arlene when I wrote my code to calculate the TCR ACE.

[bob rulz]

The North Atlantic has beaten the Western Pacific three times I believe, in 1998, 1999, and 2010. I don't think the Eastern Pacific has ever done so. Most of the exceptionally active Eastern Pacific years have also been active Western Pacific years.

Didn't the Atlantic also beat the WPAC in 2005 too?

Nope, the WPac had a near average season that year with 308.8175 ACE. WPac ACE average is ~300 units, so it takes some significant deviations for it to not come on top. 1998, 1999, and 2010 all featured both hyperactive NAtl seasons and some of the quietest WPac seasons on record. 2004 was one of the most active NAtl seasons on record when using ACE with 224.7975 units, but an active WPac that year more than doubled it (475.855).

Really puts into perspective how active the WPac is. Wow.

[euro6208]

Didn't the Atlantic also beat the WPAC in 2005 too?

Nope, the WPac had a near average season that year with 308.8175 ACE. WPac ACE average is ~300 units, so it takes some significant deviations for it to not come on top. 1998, 1999, and 2010 all featured both hyperactive NAtl seasons and some of the quietest WPac seasons on record. 2004 was one of the most active NAtl seasons on record when using ACE with 224.7975 units, but an active WPac that year more than doubled it (475.855).

Really puts into perspective how active the WPac is. Wow.

1998, 1999, and 2010 were la nina years too so no doubt.

What are the most active ACE wise seasons on record for the WPAC? Top 10 would do and i guess maybe 1997 is on top?

[Ptarmigan]

The North Atlantic has beaten the Western Pacific three times I believe, in 1998, 1999, and 2010. I don't think the Eastern Pacific has ever done so. Most of the exceptionally active Eastern Pacific years have also been active Western Pacific years.

1983 ACE
Atlantic: 17
East Pacific: 206
West Pacific: 220

1998 ACE
Atlantic: 182
East Pacific: 134
West Pacific: 157

1999 ACE
Atlantic: 177
East Pacific: 90
West Pacific: 114

2004 ACE
Atlantic: 227
East Pacific: 71
West Pacific: 476

2005 ACE
Atlantic: 250
East Pacific: 95
West Pacific: 309

2006 ACE
Atlantic: 79
East Pacific: 155
West Pacific: 317

2010 ACE
Atlantic: 165
East Pacific: 49
West Pacific: 115

Accumulate Cyclone Energy
https://en.wikipedia.org/wiki/Accumulat ... one_energy

NOAA
http://www.aoml.noaa.gov/hrd/tcfaq/E11.html

West Pacific ACE By Storm
https://en.wikipedia.org/wiki/Talk:Accu ... ac_by_year

2006 West Pacific
https://www.tropicalstormrisk.com/docs/ ... cation.pdf

2010 West Pacific
https://www.tropicalstormrisk.com/docs/ ... cation.pdf

West Pacific is a larger basin and has large area of warm water due to Asia. West Pacific is less active when the El Nino is transitioning to La Nina. The exception is 1977 where it went to El Nino and cooled and went back to El Nino again. 1977 was inactive throughout the Northern Hemisphere, while Southern Hemisphere was near average.

To my knowledge, East Pacific has never beaten West Pacific. Atlantic has beaten West Pacific and East Pacific.

[Ptarmigan]

Nope, the WPac had a near average season that year with 308.8175 ACE. WPac ACE average is ~300 units, so it takes some significant deviations for it to not come on top. 1998, 1999, and 2010 all featured both hyperactive NAtl seasons and some of the quietest WPac seasons on record. 2004 was one of the most active NAtl seasons on record when using ACE with 224.7975 units, but an active WPac that year more than doubled it (475.855).

Really puts into perspective how active the WPac is. Wow.

1998, 1999, and 2010 were la nina years too so no doubt.

What are the most active ACE wise seasons on record for the WPAC? Top 10 would do and i guess maybe 1997 is on top?

It is 1997 with ACE of 594.

1997 Pacific Typhoon Season
https://en.wikipedia.org/wiki/1997_Paci ... oon_season

[1900hurricane]

For those curious, here is a list of WPac ACE and other various stats that I have put together going back to 1970.

[KWT]

With Irma giving a display and 94L possibly also becoming a hurricane down the line, we may well end up near the EPAc/WPAC is by the time we get close to the 15th September which will be quite some turnaround given how low the ACE has been in the Atlantic thus far.