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Major Hurricane Irma


NJwx85

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The models continue to focus more and more on the 500mb cutoff over new England I mentioned last night. Definitely a trend towards a SC/NC landfall.

Favors the weak upper low/trough over the southeast. This is causing Irma to pull north towards the trough and then curve NNW at the end towards the coastline after it is left behind. It is left to move around the weak ULL disturbance.

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Will be interesting to see what weight NHC gives the GFS after this evening's Euro, and any tweaks to the track and cone.  It's a really bad dilemma for emergency mgmt and local govts from basically NC down around Florida up to at least Tampa.  Roads already jammed in much of Florida, and not being able to declare evacs with enough notice or confidence in other places is every official's nightmare.  Prob be a lot of better safe than sorry decisions made over the next few days.

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Just now, TPAwx said:

Will be interesting to see what weight NHC gives the GFS after this evening's Euro, and any tweaks to the track and cone.  It's a really bad dilemma for emergency mgmt and local govts from basically NC down around Florida up to at least Tampa.  Roads already jammed in much of Florida, and not being able to declare evacs with enough notice or confidence in other places is every official's nightmare.  Prob be a lot of better safe than sorry decisions made over the next few days.

Didn't Hurricane Floyd have this problem?  Evacs were made all over the SE and Floyd stayed just offshore enough not to cause huge problems?  Or am I remembering that incorrectly?

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1 minute ago, yoda said:

Didn't Hurricane Floyd have this problem?  Evacs were made all over the SE and Floyd stayed just offshore enough not to cause huge problems?  Or am I remembering that incorrectly?

Yeah I think that was true with Floyd and likely other canes at smaller scales.  There's always the implicit risk in putting the masses on the road, because people can die in that process, and of course the cry wolf syndrome sets in if there's no impact.  Seems like it's going to be a big test of model skill within the 72 hour window coming up.

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21 hours ago, jojo762 said:

 

IMG_1622.PNG

 

7 minutes ago, yoda said:

Didn't Hurricane Floyd have this problem?  Evacs were made all over the SE and Floyd stayed just offshore enough not to cause huge problems?  Or am I remembering that incorrectly?

Floyd did, but it was also at least a couple hundred miles farther north and the upper level pattern isn't terribly similar. (Although if you shift Floyd's track W/SW, you'd probably see a similar curve with Irma)

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