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Random Chaos
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Posts: 1024
Loc: Maryland
Re: TS Lee Pressure drop
      Mon Sep 05 2011 01:50 PM

Annularity of Katia:

Over the past several hours, Katia has gone from what appeared to be a disorganized cyclone to having a very large, well defined eye. NHC had Katia as disorganized this morning at the 5am update, however, it appears they misunderstood the structure of Katia.

Katia is following a very classic evolution to an Annular state, as described in Annular Hurricanes by Knaff, Kossin, and DeMaria. The specific example I am refering to is Hurricane Howard in 1998 which has had nearly identical evolution to Katia over the past day. A day before the annular transition Howard had a small, nearly pinhole eye. This is very similar to what was seen on Katia yesterday with a very tiny, often ill-defined eye.

The transition continued with both storms with what appeared to be dry air entrainment. However, in both storms this large dry air bulge actually became a new, giant eye. Over the course of 10 hours Howard completed the transition from giant eye to Annular. Katia is now about three hours into this transition.

In reference, I am attaching the following pictures:

Katia shown over a several hour period on September 5th, 2011


Extracted page from Annular Hurricanes by Knaff, Kossin, and DeMaria showing Hurricane Howard, 1998

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

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