F
Current Radar or Satellite Image

Flhurricane.com - Central Florida Hurricane Center - Tracking Storms since 1995Hurricanes Without the Hype! Since 1995


First day of the Atlantic Hurricane season, no tropical activity on the horizon in the near term. Mid August is usually when things pick up.
Days since last H. Landfall - US: Any 283 (Idalia) , Major: 283 (Idalia) Florida - Any: 283 (Idalia) Major: 283 (Idalia)
None
COMMUNICATION
STORM DATA
CONTENT
FOLLOW US
 

You are not logged in. [Login] Other Forums · Search · Active Topics
New user · Who's Online · FAQ · Rules · Calendar

General Discussion >> Hurricane Ask/Tell
Previous thread Previous   View all threads Index   Next thread Next   Flat Mode Flat  

Clark
Meteorologist


Reged:
Posts: 1710
Re: Questions Regarding ACE
      Fri Sep 03 2010 08:09 AM

ACE is computed starting when a storm becomes a tropical storm and ends when it is no longer a tropical storm (weakening/dissipation, extratropical transition, and so on). Longer-lived and stronger storms have higher ACE values, since it is a sum over all times of the wind speed squared.

It is a measure of what activity has already occurred and has little to no predictive value in terms of future activity. It is not a quantity that is 'expended' -- and, in fact, is not really an 'energy' at all. It's just a way of quantifying tropical activity by weighting longer-lived and more intense storms greater than shorter-lived and/or weaker storms.

Tropical systems contribute in a small way to the global energy budget, but we do not as of yet know why there are only about 90 worldwide per year. It quite likely has absolutely nothing to do with ACE, however. Controls on hurricane activity may arise out of other, truer energy considerations -- such as upper ocean heat content -- but again, this has nothing to do with ACE.

--------------------
Current Tropical Model Output Plots
(or view them on the main page for any active Atlantic storms!)

Post Extras Print Post   Remind Me!     Notify Moderator


Entire topic
Subject Posted by Posted on
* Questions Regarding ACE ChrisS Fri Sep 03 2010 08:09 AM
. * * Re: Questions Regarding ACE Clark   Fri Sep 03 2010 08:09 AM

Extra information
0 registered and 31 anonymous users are browsing this forum.

Moderator:  



Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 4732

Rate this thread

Jump to

Note: This is NOT an official page. It is run by weather hobbyists and should not be used as a replacement for official sources. 
CFHC's main servers are currently located at Hostdime.com in Orlando, FL.
Image Server Network thanks to Mike Potts and Amazon Web Services. If you have static file hosting space that allows dns aliasing contact us to help out! Some Maps Provided by:
Great thanks to all who donated and everyone who uses the site as well. Site designed for 800x600+ resolution
When in doubt, take the word of the National Hurricane Center