#464 Postby jimvb » Thu Aug 31, 2006 9:04 am
I compared the tracks of Bertha(1996) and Floyd. Wunderground makes that easy, since they have tracks of all the storms back into the 1800s and they put them all in exactly the same grid. I added the two graphics for Bertha and Floyd using Paint Shop Pro and found that they had almost exactly the same tracks, both in position and intensity, at least as far as the Carolinas were concerned.
However, the effects on us here in Central Virginia were markedly different. Bertha just gave us a few gusts of 20 mph and some rain, and the next morning the weather was good for our yearly trip to Virginia Tech. Floyd gave us howling winds, maybe 30-40 mph and higher gusts. It blew down a few trees and I could see the wind making the trees lean. The official records for Richmond show a maximum wind speed of about 30 mph for Bertha and 50 mph for Floyd. I am not too sure if I would have wanted to drive to Virginia Tech that day. This despite their nearly identical tracks. If anything, Bertha's center came closer to us.
Ernesto is starting from a more westerly point but it looks now like its track will be nearly identical to Bertha and Floyd; this would require it to attain hurricane strength before landfall.
Why did Bertha and Floyd affect us differently, and which one is Ernesto going to be more like?
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