Current Radar or Satellite Image - Central Florida Hurricane Center - Tracking Storms since 1995Hurricanes Without the Hype! Since 1995

The 2021 Altantic Hurricane Season Begins June 1st, 2021. 2020 is officially over, but still a 30% chance area lingers.
Days since last H. Landfall - US: Any 124 (Zeta) , Major: 186 (Laura) Florida - Any: 873 (Michael) Major: 873 (Michael)
Login to remove ads


General Discussion >> Hurricane Ask/Tell

Jump to first unread post. Pages: 1
Weather Watcher

Reged: Sat
Posts: 25
tropical, non-tropical, subtropical, extratropical
      #77972 - Wed Sep 05 2007 04:23 PM

99L is currently being described by the NHC in their Tropical Weather Discussion as being non-tropical at this time (4PM 9/5/07). It looks like a pretty good spinner to me.
The NHC is also saying that a small increase in organization could result in the formation of a tropical or subtropical cyclone.
Hurricanes and tropical storms that move into the northern latitudes and are petering out are typically described as becoming extratropical.
Can someone please help me understand the difference between them all?

Post Extras: Print Post   Remind Me!   Notify Moderator  

Reged: Wed
Posts: 1710
Re: tropical, non-tropical, subtropical, extratropical [Re: spinup]
      #77976 - Wed Sep 05 2007 05:20 PM

Tropical cyclones are warm-cored entities -- tropical storms, hurricanes, etc. Wind speeds are at a maximum close to the center.

Extratropical cyclones are most easily described as "things with fronts." Highly asymmetric, tilt to the west with increasing altitude, can be cold or warm-cored in nature. Wind speeds are at a maximum a fair distance away from the center.

Subtropical cyclones lie between the two. They are usually extratropical cyclones that have cut-off from the midlatitude flow and have hybrid characteristics -- a little bit of both types with most characteristics lying between the two extremes. Often warm-cored at the surface but cold-cored aloft.

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  
Pages: 1

Extra information
0 registered and 15 anonymous users are browsing this forum.

Moderator:  CFHC, Ed Dunham, Colleen A., danielw, Clark, RedingtonBeachGuy, Bloodstar, tpratch, typhoon_tip, cieldumort 

Print Topic

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

Topic views: 5856

Rate this topic

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 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