Storm Australian Severe Weather Forum

Severe Weather Discussion => General Weather - all topics not current severe weather. => Topic started by: Mike on 07 March 2007, 08:26:04 AM

Title: tropical depressions above the equator.
Post by: Mike on 07 March 2007, 08:26:04 AM

Do tropical depressions ABOVE the equator track below the equatorial line?  Is it possible that they can spin below the equatorial line out of that hemisphere and into the next? 

Remembering that the systems would rotate in the opposite direction, but is it possible?  If not is it because of the distinct weather patterns and 'pouches' of air circulating horizontally in opposite directions at the equator that would prevent it happening?

Mike.

Title: Re: tropical depressions above the equator.
Post by: Jimmy Deguara on 07 March 2007, 03:41:53 PM

I am not sure but I was of the opinion (correct me of I am wrong) that a cyclone (tropical cyclone) did cross the equator a couple of years ago. If the cyclone forms and drifts towards the equator and srvives, certainly the Coriolis Force would not have much of an impact until it moves into a region of similar latitude on the other side of the hemisphere. Any other comments? I am willing to take it on the chin here:)

Regards,

Jimmy Deguara

Title: Re: tropical depressions above the equator.
Post by: Michael Bath on 08 March 2007, 04:47:17 AM

Vamei formed at 1.5 N in December 2001

http://en.wikipedia.org/wiki/Typhoon_Vamei

Agni formed in November 2004 with its circulation crossing the equator at one stage

http://en.wikipedia.org/wiki/Cyclone_Agni

Title: Re: tropical depressions above the equator.
Post by: Mike on 08 March 2007, 06:01:36 AM

Well now that IS interesting re Agni.  I did not think that storms could cross two different circulation zones, but seems it may be so albeit briefly.  The things you find out here.....!

Mike