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Azores #96L fails to complete transition into a Sub-Tropical Storm. Elsewhere, weak low pressure in Caribbean may linger into next week.
Days since last H. Landfall - US: Any 42 (Nate) , Major: 60 (Maria) Florida - Any: 69 (Irma) Major: 69 (Irma)
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Archives >> 2005 News Talkbacks

Clark
Meteorologist


Reged: Wed
Posts: 1710
Re: Dennis Aftermath
      Sun Jul 10 2005 08:52 PM

Lysis, there is a means by which you can see higher inland gusts, but it's not really friction. Where friction saps wind speed compared to being over water, the loss of the mechanism to maintain the hurricane (the warm waters & moisture off of the ocean) also leads to a greater susceptibility for downdrafts to form.

Primarily, these things can form with the introduction of dry air into the midlevels of the column, where evaporative cooling from precipitation leads to an increased susceptibility for downdrafts as the convection dies out within the storm. In the tropics, the moisture and heating that is carried upward by convective updrafts helps to maintain the atmosphere in a state not to allow this to happen, maintaining the convection and updrafts and leading to a feedback cycle upon which the storm may grow. (As an aside, note that it is not the convection that drives the storm, but it is the updrafts from the convection which provide a conduit for the moisture and energy to be transported aloft and drive the storm.)

In summary, higher winds are felt at the low-levels off-shore as a result of a strong, well-defined circulation...upon landfall, this begins to be impacted at the lower levels first, resulting in lower overall winds speeds, but the landfall also results in the decay of the convection, by which high winds still present above the boundary layer (about 5000ft up) not impacted by friction may be transported down to the surface. After this point, the winds aloft begin to die off with the overall circulation as it spins down over land.

Hope this helps clarify things somewhat!

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Entire topic
Subject Posted by Posted on
* Dennis Aftermath MikeCAdministrator Sun Jul 10 2005 08:52 PM
. * * NRL says Noname 5 AMK   Sun Jul 10 2005 09:23 PM
. * * Re: NRL says Noname 5 BillD   Sun Jul 10 2005 09:33 PM
. * * Re: NRL says Noname 5 SeeSaw99   Sun Jul 10 2005 09:50 PM
. * * Re: NRL says Noname 5 Clark   Sun Jul 10 2005 10:05 PM
. * * Re: NRL says Noname 5 ohioaninmiss   Sun Jul 10 2005 10:09 PM
. * * Re: NRL says Noname 5 Keith234   Sun Jul 10 2005 09:57 PM
. * * Re: NRL says Noname 5 ohioaninmiss   Sun Jul 10 2005 09:50 PM
. * * Re: NRL says Noname 5 DebbiePSL   Sun Jul 10 2005 09:49 PM
. * * Re: NRL says Noname 5 Heather   Sun Jul 10 2005 09:52 PM
. * * Re: NRL says Noname 5 drcrazibob   Sun Jul 10 2005 09:41 PM
. * * Re: NRL says Noname 5 BillD   Sun Jul 10 2005 09:57 PM
. * * Re: NRL says Noname 5 h2ocean   Sun Jul 10 2005 10:02 PM
. * * Re: NRL says Noname 5 EaglezFan42   Sun Jul 10 2005 10:12 PM
. * * Re: NRL says Noname 5 Jamiewx   Sun Jul 10 2005 10:24 PM
. * * Re: NRL says Noname 5 Big Red Machine   Sun Jul 10 2005 10:30 PM
. * * Re: NRL says Noname 5 Doombot!   Sun Jul 10 2005 10:32 PM
. * * Re: NRL says Noname 5 EaglezFan42   Sun Jul 10 2005 10:27 PM
. * * Re: NRL says Noname 5 ShanaTX   Sun Jul 10 2005 10:34 PM
. * * Re: NRL says Noname 5 Jamiewx   Sun Jul 10 2005 10:38 PM
. * * Re: NRL says Noname 5 EaglezFan42   Sun Jul 10 2005 10:41 PM
. * * Re: NRL says Noname 5 SeeSaw99   Sun Jul 10 2005 10:55 PM
. * * Re: NRL says Noname 5 h2ocean   Sun Jul 10 2005 11:08 PM
. * * Re: NRL says Noname 5 h2ocean   Sun Jul 10 2005 10:38 PM
. * * Re: NRL says Noname 5 Tazmanian93   Sun Jul 10 2005 10:14 PM
. * * Re: NRL says Noname 5 Keith234   Sun Jul 10 2005 09:40 PM
. * * Re: NRL says Noname 5 GuppieGrouper   Sun Jul 10 2005 09:42 PM
. * * Re: TD # 5 Tropics Guy   Sun Jul 10 2005 09:54 PM
. * * Re: TD # 5 AMK   Sun Jul 10 2005 09:59 PM
. * * Re: TD # 5 Tropics Guy   Sun Jul 10 2005 10:12 PM
. * * Re: TD # 5 h2ocean   Sun Jul 10 2005 10:17 PM
. * * Re: TD # 5 MikeG   Sun Jul 10 2005 10:21 PM
. * * Re: TD # 5 Tazmanian93   Sun Jul 10 2005 10:18 PM
. * * Re: TD # 5 Doombot!   Sun Jul 10 2005 10:15 PM
. * * Re: TD # 5 h2ocean   Sun Jul 10 2005 10:19 PM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 07:37 PM
. * * Re: Dennis Aftermath RevUp   Sun Jul 10 2005 08:05 PM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 07:46 PM
. * * Re: Dennis Aftermath Wxwatcher2   Sun Jul 10 2005 07:54 PM
. * * Re: Dennis Aftermath Clark   Sun Jul 10 2005 08:06 PM
. * * Re: Dennis Aftermath RedingtonBeachGuy   Sun Jul 10 2005 09:28 PM
. * * TD 5 Forms Jamiewx   Sun Jul 10 2005 09:31 PM
. * * Re: Dennis Aftermath Lysis   Sun Jul 10 2005 08:14 PM
. * * Re: Dennis Aftermath Clark   Sun Jul 10 2005 08:52 PM
. * * Re: Dennis Aftermath laxpimpj   Sun Jul 10 2005 08:32 PM
. * * Re: Dennis Aftermath Clark   Sun Jul 10 2005 08:53 PM
. * * Re: Dennis Aftermath Pensacola101   Sun Jul 10 2005 08:54 PM
. * * Re: Dennis Aftermath Lysis   Sun Jul 10 2005 09:24 PM
. * * Re: Dennis Aftermath Clark   Sun Jul 10 2005 09:30 PM
. * * Re: Dennis Aftermath Big Red Machine   Sun Jul 10 2005 09:43 PM
. * * Re: Dennis Aftermath Clark   Sun Jul 10 2005 09:54 PM
. * * Re: Dennis Aftermath Keith234   Sun Jul 10 2005 09:50 PM
. * * Re: Dennis Aftermath Jamiewx   Sun Jul 10 2005 09:47 PM
. * * Max Mayfield Jamiewx   Sun Jul 10 2005 09:28 PM
. * * Re: Dennis Aftermath Keith234   Sun Jul 10 2005 09:27 PM
. * * Re: Dennis Aftermath MichaelA   Sun Jul 10 2005 08:39 PM
. * * Re: Dennis Aftermath abyrd   Sun Jul 10 2005 08:35 PM
. * * Re: Dennis Aftermath NewWatcher   Sun Jul 10 2005 08:38 PM
. * * Re: Dennis Aftermath Jamiewx   Sun Jul 10 2005 08:39 PM
. * * Re: Dennis Aftermath Pensacola101   Sun Jul 10 2005 08:45 PM
. * * Re: Dennis Aftermath Domino   Sun Jul 10 2005 08:45 PM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 07:58 PM
. * * Re: Dennis Aftermath laxpimpj   Sun Jul 10 2005 07:55 PM
. * * Re: Dennis Aftermath Kal   Sun Jul 10 2005 05:30 PM
. * * Re: Dennis Aftermath Lysis   Sun Jul 10 2005 05:36 PM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 06:38 PM
. * * Re: Dennis Aftermath Big Red Machine   Sun Jul 10 2005 06:49 PM
. * * Re: Dennis Aftermath toemastergeneral   Sun Jul 10 2005 06:53 PM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 07:26 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 07:30 PM
. * * done? HanKFranK   Sun Jul 10 2005 07:39 PM
. * * Re: done? DebbiePSL   Sun Jul 10 2005 08:12 PM
. * * Re: done? BLTizzle   Sun Jul 10 2005 07:41 PM
. * * Re: Dennis Aftermath birdwomn   Sun Jul 10 2005 07:03 PM
. * * To Beatlesgal- ANDREW starwise   Sun Jul 10 2005 06:48 PM
. * * Re: Dennis Aftermath erauwx   Sun Jul 10 2005 05:39 PM
. * * Re: Dennis Aftermath Keith234   Sun Jul 10 2005 05:39 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 05:35 PM
. * * Re: Dennis Aftermath Dougyd   Sun Jul 10 2005 05:51 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 06:04 PM
. * * Re: Dennis Aftermath lunkerhunter   Sun Jul 10 2005 06:26 PM
. * * Re: Dennis Aftermath Jwtexas   Sun Jul 10 2005 10:32 PM
. * * Category 3 danielwAdministrator   Sun Jul 10 2005 06:30 PM
. * * Re: Category 3 Nate   Sun Jul 10 2005 06:34 PM
. * * Re: Dennis Aftermath MikeCAdministrator   Sun Jul 10 2005 06:20 PM
. * * Re: Dennis Aftermath Storm Cooper   Sun Jul 10 2005 06:43 PM
. * * Re: Dennis Aftermath Kal   Sun Jul 10 2005 07:36 PM
. * * Re: Dennis Aftermath Rich B   Sun Jul 10 2005 06:54 PM
. * * Re: Dennis Aftermath GuppieGrouper   Sun Jul 10 2005 06:52 PM
. * * Re: Dennis Aftermath RevUp   Sun Jul 10 2005 07:18 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 07:23 PM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 07:29 PM
. * * Re: Dennis Aftermath Storm Cooper   Sun Jul 10 2005 06:54 PM
. * * Re: Dennis Aftermath danielwAdministrator   Sun Jul 10 2005 05:44 PM
. * * Re: Dennis Aftermath GuppieGrouper   Sun Jul 10 2005 05:43 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 05:13 PM
. * * Re: Dennis Aftermath EaglezFan42   Sun Jul 10 2005 06:32 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 06:36 PM
. * * Re: Dennis Aftermath stormchazer   Sun Jul 10 2005 05:18 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 05:19 PM

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