2018 ACE: NATL - 128.9 - EPAC - 316.3 - WPAC - 338.5 - NIO - 29.1

[cycloneye]

WPAC is almost 4 units above average for March 30th as Typhoon JELAWAT spiked the ACE but wont get a lot more as it weakens. SHEM is 10 units behind the normal average.

[1900hurricane]

This is the first time the WPac has been above average ACE at any point since the end of the 2015 Pacific Typhoon Season.

[1900hurricane]

My personal calculations now have WPac ACE at 10.045 as of 00Z March 31st. Last year, it took until the end of July 23rd for the WPac to cross 10 units of ACE.

[euro6208]

[cycloneye]

WPAC has fallen to below average after a quick start (11.5 units) The average for this date April 23 is 12.3.

[euro6208]

Even further behind WPAC average is 14.0...

[euro6208]

Tropical Storm 04W

Short live TS garners 0.4 bringing the season total to 11.9 . Average at this point of the season is 19.0...

[RL3AO]

I had the understanding that ACE didn't count for subtropical storms. Did the definition change? Or are Maue's and Klotzbach's automated scripts not calculating this correctly.

[StruThiO]

.7 seems high for that sloppy dry air addicted mess

[Alyono]

I had the understanding that ACE didn't count for subtropical storms. Did the definition change? Or are Maue's and Klotzbach's automated scripts not calculating this correctly.

I believe it does count officially

[galaxy401]

.7 seems high for that sloppy dry air addicted mess

Well it reached 65 mph and with TS force winds so...that seems about right.

Though, I'm skeptical of them counting subtropical systems as ACE now. They aren't fully tropical (it can be debated Alberto is tropical).

[RL3AO]

I had the understanding that ACE didn't count for subtropical storms. Did the definition change? Or are Maue's and Klotzbach's automated scripts not calculating this correctly.

I believe it does count officially

It appears that you are correct. AOML/NHC says ACE is calculated for named storms which they define as STS, TS, and HUs. That seems like a recent change to the definition but maybe I'm just losing my mind.

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

[cycloneye]

Up to 1.6. I use the Klotzbach site.

http://tropical.atmos.colostate.edu/Realtime/

[RL3AO]

Accumulated Cyclone Energy for Alberto (01L)
Time Intensity Adv. ACE Storm ACE
----------- ----------- ---------- -----------
2018052512 35 0.1225 0.1225
2018052518 35 0.1225 0.245
2018052600 35 0.1225 0.3675
2018052606 35 0.1225 0.49
2018052612 35 0.1225 0.6125
2018052618 35 0.1225 0.735
2018052700 35 0.1225 0.8575
2018052706 35 0.1225 0.98
2018052712 40 0.16 1.14
2018052718 45 0.2025 1.3425
2018052800 55 0.3025 1.645

[TheStormExpert]

Since when do Subtropical Storms account for ACE?

[Alyono]

Since when do Subtropical Storms account for ACE?

was a message board myth that subtropical storms did not count toward ACE

[USTropics]

Here is confirmation:

Named Storms = Tropical Storms, Hurricanes and Subtropical Storms
Hurricanes = Saffir-Simpson Hurricane Scale 1 to 5
Major Hurricanes = Saffir-Simpson Hurricane Scale 3, 4, or 5
"ACE" = Accumulated Cyclone Energy - An index that combines the numbers of systems, how long they existed and how intense they became. It is calculated by squaring the maximum sustained surface wind in the system every six hours that the cyclone is a Named Storm and summing it up for the season. It is expressed in 104 kt2.

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

[euro6208]

It changed recently. Subtropical storms don't count for ACE not too long ago.

Wow so now the Atlantic is counting these and other basins don't? Because they have recon?...

[NotSparta]

It changed recently. Subtropical storms don't count for ACE not too long ago.

Wow so now the Atlantic is counting these and other basins don't? Because they have recon?...

I thought subtropical storms are counted in all basins now. It's just they're more common in the Atlantic

[euro6208]

It changed recently. Subtropical storms don't count for ACE not too long ago.

Wow so now the Atlantic is counting these and other basins don't? Because they have recon?...

I thought subtropical storms are counted in all basins now. It's just they're more common in the Atlantic

Subtropical storms aren't counted for the other basins for some reason. JTWC nor JMA doesn't even count these for the world's most active basin. It's weird. More common in the Atlantic? Nope...It's just ignored as they aren't tropical...Not just here but worldwide.