Re: RMS HWind
Posted by Chris in Tampa on 9/13/2018, 3:59 pm
The estimate of the Surge Destructive Potential (SDP) Rating (on a scale from 0 to 6) is at 4.2 as of 2pm EDT Thursday. That's a rough estimate because I don't see that they have posted the value that comes from a gridded analysis.

Using the wind radii to determine a rough estimate of the total storm Integrated Kinetic Energy (IKE) and Surge Destructive Potential (SDP), I took a look at what the IKE calculator (
https://www.washingtonpost.com/graphics/2017/national/how-big-is-hurricane-irma/ ) gives for some destructive storms around landfall.

The best track data page for a storm at HurricaneCity has IKE and SDP if the storm has radii data available. It's a rough estimate.

"The SDP box is the Surge Destructive Potential Rating based on a scale of zero to 6. SDP is interpreted similar to the Saffir SImpson scale in that the most destructive storms are rated above 5 and the least destructive storms < 1."

2pm EDT Thursday for Florence:
IKE value for winds >= 34 knots: 68TJ
SDP: 4.2


And some historic storms, with values around 12 hours prior to landfall to then the approximate landfall values.


Katrina:
124TJ to 100TJ
5.2 to 4.9


Ike:
125TJ to 113TJ
5.2 to 5.1


Sandy:
365TJ to 434TJ to 466TJ to 442TJ
5.8 to 5.9


Sandy had some extreme values.

But this article from last year:
https://www.washingtonpost.com/graphics/2017/national/how-big-is-hurricane-irma/
Has 330TJ for Sandy. But still, really high.
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RMS HWind - cypresstx, 9/13/2018, 3:16 pm
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