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90L crossing over Florida with flooding rains, strong winds and brief tornadoes/spouts. Next week eyes turn to W Gulf in active June pattern
Days since last H. Landfall - US: Any 288 (Idalia) , Major: 288 (Idalia) Florida - Any: 288 (Idalia) Major: 288 (Idalia)
 


News Talkback >> 2005 News Talkbacks

Clark
Meteorologist


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Posts: 1710
Re: Dennis Aftermath
      Mon Jul 11 2005 12:52 AM

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 Mon Jul 11 2005 12:52 AM
. * * NRL says Noname 5 AMK   Mon Jul 11 2005 01:23 AM
. * * Re: NRL says Noname 5 BillD   Mon Jul 11 2005 01:33 AM
. * * Re: NRL says Noname 5 SeeSaw99   Mon Jul 11 2005 01:50 AM
. * * Re: NRL says Noname 5 Clark   Mon Jul 11 2005 02:05 AM
. * * Re: NRL says Noname 5 ohioaninmiss   Mon Jul 11 2005 02:09 AM
. * * Re: NRL says Noname 5 Keith234   Mon Jul 11 2005 01:57 AM
. * * Re: NRL says Noname 5 ohioaninmiss   Mon Jul 11 2005 01:50 AM
. * * Re: NRL says Noname 5 DebbiePSL   Mon Jul 11 2005 01:49 AM
. * * Re: NRL says Noname 5 Heather   Mon Jul 11 2005 01:52 AM
. * * Re: NRL says Noname 5 drcrazibob   Mon Jul 11 2005 01:41 AM
. * * Re: NRL says Noname 5 BillD   Mon Jul 11 2005 01:57 AM
. * * Re: NRL says Noname 5 h2ocean   Mon Jul 11 2005 02:02 AM
. * * Re: NRL says Noname 5 EaglezFan42   Mon Jul 11 2005 02:12 AM
. * * Re: NRL says Noname 5 Jamiewx   Mon Jul 11 2005 02:24 AM
. * * Re: NRL says Noname 5 Big Red Machine   Mon Jul 11 2005 02:30 AM
. * * Re: NRL says Noname 5 Doombot!   Mon Jul 11 2005 02:32 AM
. * * Re: NRL says Noname 5 EaglezFan42   Mon Jul 11 2005 02:27 AM
. * * Re: NRL says Noname 5 ShanaTX   Mon Jul 11 2005 02:34 AM
. * * Re: NRL says Noname 5 Jamiewx   Mon Jul 11 2005 02:38 AM
. * * Re: NRL says Noname 5 EaglezFan42   Mon Jul 11 2005 02:41 AM
. * * Re: NRL says Noname 5 SeeSaw99   Mon Jul 11 2005 02:55 AM
. * * Re: NRL says Noname 5 h2ocean   Mon Jul 11 2005 03:08 AM
. * * Re: NRL says Noname 5 h2ocean   Mon Jul 11 2005 02:38 AM
. * * Re: NRL says Noname 5 Tazmanian93   Mon Jul 11 2005 02:14 AM
. * * Re: NRL says Noname 5 Keith234   Mon Jul 11 2005 01:40 AM
. * * Re: NRL says Noname 5 GuppieGrouper   Mon Jul 11 2005 01:42 AM
. * * Re: TD # 5 Tropics Guy   Mon Jul 11 2005 01:54 AM
. * * Re: TD # 5 AMK   Mon Jul 11 2005 01:59 AM
. * * Re: TD # 5 Tropics Guy   Mon Jul 11 2005 02:12 AM
. * * Re: TD # 5 h2ocean   Mon Jul 11 2005 02:17 AM
. * * Re: TD # 5 MikeG   Mon Jul 11 2005 02:21 AM
. * * Re: TD # 5 Tazmanian93   Mon Jul 11 2005 02:18 AM
. * * Re: TD # 5 Doombot!   Mon Jul 11 2005 02:15 AM
. * * Re: TD # 5 h2ocean   Mon Jul 11 2005 02:19 AM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 11:37 PM
. * * Re: Dennis Aftermath RevUp   Mon Jul 11 2005 12:05 AM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 11:46 PM
. * * Re: Dennis Aftermath Wxwatcher2   Sun Jul 10 2005 11:54 PM
. * * Re: Dennis Aftermath Clark   Mon Jul 11 2005 12:06 AM
. * * Re: Dennis Aftermath RedingtonBeachGuy   Mon Jul 11 2005 01:28 AM
. * * TD 5 Forms Jamiewx   Mon Jul 11 2005 01:31 AM
. * * Re: Dennis Aftermath Lysis   Mon Jul 11 2005 12:14 AM
. * * Re: Dennis Aftermath Clark   Mon Jul 11 2005 12:52 AM
. * * Re: Dennis Aftermath laxpimpj   Mon Jul 11 2005 12:32 AM
. * * Re: Dennis Aftermath Clark   Mon Jul 11 2005 12:53 AM
. * * Re: Dennis Aftermath Pensacola101   Mon Jul 11 2005 12:54 AM
. * * Re: Dennis Aftermath Lysis   Mon Jul 11 2005 01:24 AM
. * * Re: Dennis Aftermath Clark   Mon Jul 11 2005 01:30 AM
. * * Re: Dennis Aftermath Big Red Machine   Mon Jul 11 2005 01:43 AM
. * * Re: Dennis Aftermath Clark   Mon Jul 11 2005 01:54 AM
. * * Re: Dennis Aftermath Keith234   Mon Jul 11 2005 01:50 AM
. * * Re: Dennis Aftermath Jamiewx   Mon Jul 11 2005 01:47 AM
. * * Max Mayfield Jamiewx   Mon Jul 11 2005 01:28 AM
. * * Re: Dennis Aftermath Keith234   Mon Jul 11 2005 01:27 AM
. * * Re: Dennis Aftermath MichaelA   Mon Jul 11 2005 12:39 AM
. * * Re: Dennis Aftermath abyrd   Mon Jul 11 2005 12:35 AM
. * * Re: Dennis Aftermath NewWatcher   Mon Jul 11 2005 12:38 AM
. * * Re: Dennis Aftermath Jamiewx   Mon Jul 11 2005 12:39 AM
. * * Re: Dennis Aftermath Pensacola101   Mon Jul 11 2005 12:45 AM
. * * Re: Dennis Aftermath Domino   Mon Jul 11 2005 12:45 AM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 11:58 PM
. * * Re: Dennis Aftermath laxpimpj   Sun Jul 10 2005 11:55 PM
. * * Re: Dennis Aftermath Kal   Sun Jul 10 2005 09:30 PM
. * * Re: Dennis Aftermath Lysis   Sun Jul 10 2005 09:36 PM
. * * Re: Dennis Aftermath craigm   Sun Jul 10 2005 10:38 PM
. * * Re: Dennis Aftermath Big Red Machine   Sun Jul 10 2005 10:49 PM
. * * Re: Dennis Aftermath toemastergeneral   Sun Jul 10 2005 10:53 PM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 11:26 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 11:30 PM
. * * done? HanKFranK   Sun Jul 10 2005 11:39 PM
. * * Re: done? DebbiePSL   Mon Jul 11 2005 12:12 AM
. * * Re: done? BLTizzle   Sun Jul 10 2005 11:41 PM
. * * Re: Dennis Aftermath birdwomn   Sun Jul 10 2005 11:03 PM
. * * To Beatlesgal- ANDREW starwise   Sun Jul 10 2005 10:48 PM
. * * Re: Dennis Aftermath erauwx   Sun Jul 10 2005 09:39 PM
. * * Re: Dennis Aftermath Keith234   Sun Jul 10 2005 09:39 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 09:35 PM
. * * Re: Dennis Aftermath Dougyd   Sun Jul 10 2005 09:51 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 10:04 PM
. * * Re: Dennis Aftermath lunkerhunter   Sun Jul 10 2005 10:26 PM
. * * Re: Dennis Aftermath Jwtexas   Mon Jul 11 2005 02:32 AM
. * * Category 3 danielwAdministrator   Sun Jul 10 2005 10:30 PM
. * * Re: Category 3 Nate   Sun Jul 10 2005 10:34 PM
. * * Re: Dennis Aftermath MikeCAdministrator   Sun Jul 10 2005 10:20 PM
. * * Re: Dennis Aftermath Storm Cooper   Sun Jul 10 2005 10:43 PM
. * * Re: Dennis Aftermath Kal   Sun Jul 10 2005 11:36 PM
. * * Re: Dennis Aftermath Rich B   Sun Jul 10 2005 10:54 PM
. * * Re: Dennis Aftermath GuppieGrouper   Sun Jul 10 2005 10:52 PM
. * * Re: Dennis Aftermath RevUp   Sun Jul 10 2005 11:18 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 11:23 PM
. * * Re: Dennis Aftermath Margie   Sun Jul 10 2005 11:29 PM
. * * Re: Dennis Aftermath Storm Cooper   Sun Jul 10 2005 10:54 PM
. * * Re: Dennis Aftermath danielwAdministrator   Sun Jul 10 2005 09:44 PM
. * * Re: Dennis Aftermath GuppieGrouper   Sun Jul 10 2005 09:43 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 09:13 PM
. * * Re: Dennis Aftermath EaglezFan42   Sun Jul 10 2005 10:32 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 10:36 PM
. * * Re: Dennis Aftermath stormchazer   Sun Jul 10 2005 09:18 PM
. * * Re: Dennis Aftermath Nate   Sun Jul 10 2005 09:19 PM

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