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Archives 2010s >> 2011 News Talkbacks

Ed Dunham
Former Meteorologist & CFHC Forum Moderator (Ed Passed Away on May 14, 2017)

Reged:
Posts: 2565
Loc: Melbourne, FL

Annular Katia?
Mon Sep 05 2011 01:27 PM

While Katia does exhibit some of the fundamentals for an annular hurricane, she is not quite there yet. Here is a good definition of Annular hurricanes from Wikipedia:

Annular Hurricane

Note that one of the formation requirements IS an eyewall replacement cycle. Another is a lack of banding features - and Katia still has a feeder band to the northeast. SSTs are at 28C which is within the acceptable range, but its on the high side. Although highly uncommon I've seen ERCs in Cat I and Cat II storms. Why they happen in some weaker hurricanes but not others is still one of the mysteries of hurricanes.

Regarding the size of the eye, its actually a misconception that a large eye size normally means a stronger hurricane. In August, 2000, Hurricane Alberto varied from a Tropical Storm to a Cat III Hurricane over a period of almost 3 weeks and was considered to be annular at various times during its evolution - including Cat I in the north Atlantic - with a 60 mile wide eye. In 1978, Hurricane Fico in the eastern and central Pacific moved to the west just to the north of 15N for 9 straight days with a 60 mile wide eye and intensities that varied from Cat I to Cat IV, but Fico was not annular. Fico still had a 60 mile wide eye when it passed southeast of the Big Isle on August 20th as a Cat II. However, you are probably correct that an annular hurricane always has a large eye.

Maybe Katia will get to the annular state in a day or so. Certainly a topic of good discussion as long as we can keep it focused on Katia.
ED

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Subject	Posted by	Posted on
Cat II Katia Continues Northwest - Lee's Remnants Move Into Mississippi	MikeC	Mon Sep 05 2011 01:27 PM
Re: Annular Katia?	Ed in Va	Mon Sep 05 2011 08:53 PM
Annular Katia?	Ed Dunham	Mon Sep 05 2011 01:27 PM
Re: TS Lee Pressure drop	Random Chaos	Mon Sep 05 2011 11:02 AM
Re: TS Lee Pressure drop	danielw	Mon Sep 05 2011 10:52 AM
Re: TS Lee Pressure drop	Random Chaos	Mon Sep 05 2011 10:32 AM
Re: TS Lee Pressure drop	danielw	Mon Sep 05 2011 10:27 AM
Re: TS Lee Pressure drop	MichaelA	Mon Sep 05 2011 10:18 AM
Katia Eye	danielw	Mon Sep 05 2011 10:15 AM
Re: TS Lee Pressure drop	Random Chaos	Mon Sep 05 2011 09:50 AM
Re: TS Lee Pressure drop	typhoon_tip	Sun Sep 04 2011 03:08 PM
Re: TS Lee Pressure drop	Random Chaos	Sun Sep 04 2011 01:32 PM
Re: TS Lee Pressure drop	danielw	Sat Sep 03 2011 05:10 PM
Re: TS Lee Pressure drop	berrywr	Sat Sep 03 2011 03:00 PM
TS Lee Pressure drop	danielw	Sat Sep 03 2011 01:25 PM
Re: Lee Rain Continues as it nears the Central Louisiana Coastline	cieldumort	Sat Sep 03 2011 12:18 PM
Re: Tropical Storm Lee	Joeyfl	Sat Sep 03 2011 11:28 AM
Re: Tropical Storm Lee	MichaelA	Sat Sep 03 2011 10:01 AM
Re: Tropical Storm Lee	danielw	Sat Sep 03 2011 08:06 AM
Tropical Storm Lee	danielw	Sat Sep 03 2011 07:40 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	papaswamp	Sat Sep 03 2011 06:42 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Random Chaos	Fri Sep 02 2011 08:43 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Random Chaos	Fri Sep 02 2011 06:29 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	MichaelA	Fri Sep 02 2011 02:57 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	MichaelA	Fri Sep 02 2011 11:55 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Ed Dunham	Fri Sep 02 2011 11:40 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	MichaelA	Fri Sep 02 2011 11:31 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	TXEB	Fri Sep 02 2011 11:18 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	JMII	Fri Sep 02 2011 11:05 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	doug	Fri Sep 02 2011 10:29 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	javlin	Fri Sep 02 2011 10:10 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	MichaelA	Fri Sep 02 2011 09:49 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Joeyfl	Fri Sep 02 2011 09:33 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	mikethewreck	Fri Sep 02 2011 05:24 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	cieldumort	Fri Sep 02 2011 01:47 AM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Random Chaos	Thu Sep 01 2011 11:43 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	javlin	Thu Sep 01 2011 11:23 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	Ed Dunham	Thu Sep 01 2011 09:25 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	watchinout	Thu Sep 01 2011 09:01 PM
Re: Tropical Depression 13 Forms in the Gulf of Mexico	MichaelA	Thu Sep 01 2011 07:58 PM

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