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Hurricane Irene Model and Forecast Discussion


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Even at just 6hrs in, 00z GFS showing major changes in the nothern plains/Western US trough. Looks less amplified in the northern plains region. Looks like this run may come in further west, at least initially.

Another thing worth paying attention to is if there is a little piece of s/w energy in MI/IL area at around 66 hours... the 12z ECWMF had a small s/w in this area that dug down in front of the kicker shortwave that slowed its progress, while also allowing Irene to take a more leftward track up the coastline.

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Another thing worth paying attention to is if there is a little piece of s/w energy in MI/IL area at around 66 hours... the 12z ECWMF had a small s/w in this area that dug down in front of the kicker shortwave that slowed its progress, while also allowing Irene to take a more leftward track up the coastline.

Wow thankyou for that graphic. I am curious what is leading to the vast changes run-to-run in the western "kicker" & if that potentially has an impact on the Central US shortwave?

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hard to tell how west it is compared to a bit slower etc than 18z, tho looks to make landfall/close on outer banks at 72... almost identical to 12z euro thus far but next few frames had more divergence b/w the two

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GFS appears to have initialized too far Southwest

Just played around with it for a few minutes and if anything it's ~30 miles too far to the NE, but I'm willing to give it the benefit of the doubt and call it close enough (the center of the wind field seems right on, but the MSL chart seems displaced approx 30 miles too far to the NE).

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What I don't understand is why the models have the storm stregnthening as it passes Hatteras.

Well, the Globals have the intensity wrong to begin with (way too weak), I think the models is just "catching up" so the pressure by the time it gets up there may be closer to reality....

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It's also quite a bit slower this run....

pretty close to the euro.. a few hours slower than previous gfs tho the westward shift might also have something to do with that feel

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