Unregistered User
Sun Sep 26 2004 06:28 AM
Re: Jeanne Windfield Map

Yeah, I noticed that. It supprised me and makes me worry even more for those in it's path. If you take a look at their landfall map of Ivan, it shows that Jeanne was more powerful at landfall. I'm not sure of how they are calculating this, but if you look sequence over the last 2 days, it seems to match the vortex messages.

I don't have a timeline of the votex messages, but I believe Jeanne was upgraded to Cat 3 before or around 1630Z to 1930Z on the 25th. If you look at that map the Cat 3 winds were localized in pockets of the NW and NE quads. Since that point, the pressure significantly dropped, but we were not seeing a corresponding increase in wind speed.

I'm not even close to educated enough to guess why they show such a rapid intesifiication between 130Z and 300Z(landfall) today. My speculation would be that the wind speeds finally caught up with the pressure drop, possibly some influence from the gulf stream. The eyewall did look like it became much better organized right before landfall and it also seemed to contract which would also cause a windspeed increase.

If you notice in the 300Z map, there are concentric eyewalls. Would the winds increase this dramatically outside the outter eyewall before the inner eyewall collapsed?

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