Hurricane sizes

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weather2a
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Hurricane sizes Aug 21, 2015 0:48:51 GMT -6

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Post by weather2a on Aug 21, 2015 0:48:51 GMT -6

As we watch one of the smallest hurricanes that we can remember churning in the Atlantic I'm sure that the question "why do we see hurricanes vary in size so much?" or "what causes a storm to be a certain size" comes to mind. I for one have seen some answers to the question but I remain unsatisfied. It seems as though tropical systems take on a personality that is usually carried with them for their entire existence. Hurricane Andrew remained a compact storm system despite intensifying to a category 5 hurricane and despite being disrupted by the Florida peninsula. Hurricane Ike was always a medium to large sized tropical system even as it grew to a category 4 hurricane but after its core was disrupted by Cuba and it entered the GOM it seemed to grow more in size than in intensity. So, what causes a tropical system to start out with a compact or large circulation and what causes it to change? Why is Hurricane Danny a midget.

SKYSUMMIT Administrator President \| Director of Operations Posts: 64,788 Location: Hammond, LA Staff Member	Hurricane sizes Aug 21, 2015 7:12:32 GMT -6 Quote Select Post Deselect Post Link to Post Back to Top Post by SKYSUMMIT on Aug 21, 2015 7:12:32 GMT -6 I believe one reason to be is that he was surrounded by dry air from the beginning...not much moisture to pull from. The moisture he did get came from the ITCZ. Other than that, the basin was pretty dry.
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weather2a
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Posts: 515

Hurricane sizes Aug 21, 2015 14:19:48 GMT -6

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Post by weather2a on Aug 21, 2015 14:19:48 GMT -6

Aug 21, 2015 7:12:32 GMT -6 SKYSUMMIT said:

I believe one reason to be is that he was surrounded by dry air from the beginning...not much moisture to pull from. The moisture he did get came from the ITCZ. Other than that, the basin was pretty dry.

Yes, moisture envelope is a factor, but I also know that there are other factors. Danny has had decent moisture to its south and East, so I'm wondering what the other factors are. I can't remember a storm going from really small and compact like Danny or Charlie to large like Katrina or Ike and I know that there have been storms that have dealt with dry to moist environments.

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Hurricane sizes Aug 21, 2015 16:25:02 GMT -6

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Post by SKYSUMMIT on Aug 21, 2015 16:25:02 GMT -6

The strength of the upper air environment comes into factor as well. For instance, if there's a strong, well developed, area of high pressure aloft, and perfectly positioned directly above the storm, the storm's outflow will be perfect aiding in the exhaust of heat in all quadrants.

Last Edit: Aug 21, 2015 16:25:23 GMT -6 by SKYSUMMIT

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mrjamie GCWX Supporter Vice President \| Chief Consultant Posts: 3,056	Hurricane sizes Aug 21, 2015 22:06:28 GMT -6 Quote Select Post Deselect Post Link to Post Back to Top Post by mrjamie on Aug 21, 2015 22:06:28 GMT -6 What would be nice to see is images of storms to compare the size. I seem to remember Gilbert being a very large storm.
	Last Edit: Aug 21, 2015 22:12:09 GMT -6 by mrjamie GCWX Vice President \| Chief Consultant CoCoRaHs Station: LA-ST-8

mrjamie GCWX Supporter Vice President \| Chief Consultant Posts: 3,056	Hurricane sizes Aug 21, 2015 22:12:45 GMT -6 Quote Select Post Deselect Post Link to Post Back to Top Post by mrjamie on Aug 21, 2015 22:12:45 GMT -6 pielkeclimatesci.wordpress.com/2012/10/31/16873/ One example I found
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SKYSUMMIT Administrator President \| Director of Operations Posts: 64,788 Location: Hammond, LA Staff Member	Hurricane sizes Aug 21, 2015 22:16:48 GMT -6 mrjamie and weather2a like this Quote Select Post Deselect Post Link to Post Back to Top Post by SKYSUMMIT on Aug 21, 2015 22:16:48 GMT -6 Yea, that Typhoon Tip was ridiculous. Beautiful pic of Gilbert:
	Last Edit: Aug 21, 2015 22:18:04 GMT -6 by SKYSUMMIT REALTOR - Team Geaux Realty, LLC (Let me be your Realtor!) Search homes on my website --> www.scottguidry.com/ NWS COOP ID: 16-7425-08 CoCoRaHs ID: LA-TG-23

mrjamie GCWX Supporter Vice President \| Chief Consultant Posts: 3,056	Hurricane sizes Aug 21, 2015 22:56:53 GMT -6 SKYSUMMIT and 99lsfm2 like this Quote Select Post Deselect Post Link to Post Back to Top Post by mrjamie on Aug 21, 2015 22:56:53 GMT -6 Looking for charts I came across this
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hurricaner
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Hurricane sizes Jun 10, 2016 9:03:12 GMT -6

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Post by hurricaner on Jun 10, 2016 9:03:12 GMT -6

From what I have seen the size of a storm is dependent on several factors: environment, initial size, time, and landfalls. I have noticed that storms in good environment over time get larger (Gilbert is a good example). Also in many cases a storm that hits a decent size landmass (Cuba, Hispanola, Florida Peninsular, etc) and survives they tend to grow larger (Andrew, Ike, Katrina). Finally if a storm starts off with a large circulation though slower to develop tend to be larger in size once they strengthen.

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