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News Talkback >> 2007 News Talkbacks

Random Chaos
Weather Analyst

Reged:
Posts: 1024
Loc: Maryland

Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane
Tue Aug 21 2007 07:15 AM

Hmm, new thread started while I was posting. Moving my post here.
-----

Final report from landfall:

(I'm mostly just quoting stuff from the 5am discussion)

Wind:
* A PEAK FLIGHT-LEVEL WIND OF 165 KT WAS MEASURED JUST NORTH OF THE EYE.
* MAXIMUM SURFACE WINDS FROM THE SFMR WERE 124 KT...BUT IT IS HIGHLY LIKELY THAT THE MAXIMUM SURFACE WIND SPEED WAS NOT REPORTED BY THE SFMR INSTRUMENT.
* A GPS DROPSONDE IN THE NORTHERN EYEWALL MEASURED A WIND SPEED OF 178 KT AVERAGED OVER THE LOWEST 150 METERS OF THE SOUNDING.

BASED ON THE DROPSONDE AND THE FLIGHT-LEVEL WINDS...THE INTENSITY IS SET AT 145 KT.

If 178kt was measured, even with a 10% step down (and at 150 feet, 10% may be too large), that is 160kts (184mph), or 15kts faster than the surface value they used.

The 145kt value works out to 165mph.

Presure
A DROPSONDE IN THE EYE MEASURED A CENTRAL PRESSURE OF 906 MB JUST PRIOR TO LANDFALL.

SOME HISTORIC NOTES ARE IN ORDER HERE.
* THE 906 MB CENTRAL PRESSURE IS THE NINTH LOWEST ON RECORD FOR AN ATLANTIC BASIN HURRICANE...
* AND THE THIRD LOWEST AT LANDFALL BEHIND THE 1935 LABOR DAY HURRICANE IN THE FLORIDA KEYS AND HURRICANE GILBERT OF
1988 IN CANCUN MEXICO.
* DEAN IS ALSO THE FIRST CATEGORY FIVE HURRICANE TO MAKE LANDFALL IN THE ATLANTIC BASIN SINCE ANDREW OF 1992.

Also, the last recon reported (08:14:00Z):
"CONTINUOUS LIGHTING AND SEVERE TURBULENCE SOUTH EYEWALL"

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Entire topic
Subject	Posted by	Posted on
Dean Makes Landfall in Mexico as a Category 5 Hurricane	MikeC	Tue Aug 21 2007 07:15 AM
Re: dean's terminal run	dem05	Wed Aug 22 2007 03:25 AM
Re: dean's terminal run	DougBaker	Wed Aug 22 2007 01:20 AM
Re: dean's terminal run	scottsvb	Tue Aug 21 2007 10:59 PM
Re: dean's terminal run	Lee-Delray	Tue Aug 21 2007 07:16 PM
Re: dean's terminal run	Hugh	Tue Aug 21 2007 07:03 PM
Re: dean's terminal run	Addicted2Cane	Tue Aug 21 2007 06:34 PM
dean's terminal run	HanKFranK	Tue Aug 21 2007 06:17 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Clark	Tue Aug 21 2007 06:03 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Thunderbird12	Tue Aug 21 2007 05:59 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Random Chaos	Tue Aug 21 2007 05:18 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Raymond	Tue Aug 21 2007 04:24 PM
Re: 92L gone?	Clark	Tue Aug 21 2007 03:37 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Clark	Tue Aug 21 2007 03:35 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	syfr	Tue Aug 21 2007 02:46 PM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	weather999	Tue Aug 21 2007 02:28 PM
Re: 92L gone?	Hootowl	Tue Aug 21 2007 12:12 PM
Re: 92L gone?	B.C.Francis	Tue Aug 21 2007 12:12 PM
Re: 92L gone?	GuppieGrouper	Tue Aug 21 2007 12:04 PM
92L gone?	weatherguy08	Tue Aug 21 2007 11:16 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Jorge Nakazawa	Tue Aug 21 2007 10:07 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Psyber	Tue Aug 21 2007 08:38 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Raymond	Tue Aug 21 2007 08:20 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	pcola	Tue Aug 21 2007 08:06 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Lee-Delray	Tue Aug 21 2007 08:00 AM
Re: Dean Makes Landfall in Mexico as a Category 5 Hurricane	Random Chaos	Tue Aug 21 2007 07:15 AM

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