vineyardsaker
(Weather Guru)
Wed Sep 24 2008 10:48 PM
definitions

Hi,

I just saw the following on the 8PM NHC advisory on 94L:

Quote:

THIS STRUCTURE IS MORE CHARACTERISTIC OF AN EXTRA-TROPICAL WEATHER
SYSTEM. HOWEVER...THERE IS STILL THE POTENTIAL FOR THIS SYSTEM TO
BECOME A TROPICAL OR SUBTROPICAL CYCLONE TONIGHT OR THURSDAY



Could somebody please point me to a good (basic) definition of what a system needs to do to be considered extratropical, subtropical or tropical? Alternatively (or in addition) I would be interested in reading up on the kind of systems out there so maybe you could point me to a text available on the Internet which would provide an introduction to this topic for a layman?

Many thanks!

VS


Note: This is NOT an official page. It is run by weather hobbyists and should not be used as a replacement for official sources.
Great thanks to all who donated and everyone who uses the site as well. Site designed for 1920x1080+ resolution.
When in doubt, take the word of the National Hurricane Center.