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Hurricane Irene


Baroclinic Zone

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00z GFS is going to be a huge hit. Though again, it means very little at this stage. Purely for entertainment purposes.

Slow moving storm means a ton of heavy rain and high winds for this area. If that happened, it would be like some of our biggest noreasters around here.

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It goes west of you...probably over RI and through W suburbs of BOS. Its a bad track for Narragansett Bay.

How strong does it look like on that model run when it gets up at our lat? The slow movement wont help, the water temps have already dropped from their midsummer highs.

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What we can take away from today's model runs:

The GFS has demonstrated multiple ways in which Irene can make it up the coast and make landfall in New England, with varying intensities of the three troughs that interact with it over the next 6 days. Definitely something to keep in mind.

The MAIN point is that the westerlies are at anomalously high latitude. So Irene can gain more latitude before recurving east. We also do see a nearly classic pattern shift from a -NAO Greenland block to a North Atlantic ridge.

Both of these characteristics were what I was looking at about a month ago when I called for a hot end to August ... obviously a bust, but for the same reasons, now it could be a wet end.

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What we can take away from today's model runs:

The GFS has demonstrated multiple ways in which Irene can make it up the coast and make landfall in New England, with varying intensities of the three troughs that interact with it over the next 6 days. Definitely something to keep in mind.

The MAIN point is that the westerlies are at anomalously high latitude. So Irene can gain more latitude before recurving east. We also do see a nearly classic pattern shift from a -NAO Greenland block to a North Atlantic ridge.

Both of these characteristics were what I was looking at about a month ago when I called for a hot end to August ... obviously a bust, but for the same reasons, now it could be a wet end.

The lack of a huge trough to our west has me believing this won't be that intense IF it does actually hit us. But this also increases the flooding threat quite a bit IMHO.

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The lack of a huge trough to our west has me believing this won't be that intense IF it does actually hit us. But this also increases the flooding threat quite a bit IMHO.

Especially if it hugs the coast that close, it's sitting over upwelling waters, far from supporting a hurricane

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Just out of curiousity why would a lack of a trough affect intensity? Take too long to arrive or something?

Yes. If it crawls up the coast, it loses its punch quite quickly...and you also do not have the forward speed in the right semi-circle to make up for the decreasing intensity.

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Yes. If it crawls up the coast, it loses its punch quite quickly...and you also do not have the forward speed in the right semi-circle to make up for the decreasing intensity.

So we basically need (to get a TS+ in NE) a brushing hit in nc or sc and then it to get picked up and get on its horse quickly up here? Also can a storm intensify to the point where it starts to fuel its own foward progress or is it all external forcing?

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Yes. If it crawls up the coast, it loses its punch quite quickly...and you also do not have the forward speed in the right semi-circle to make up for the decreasing intensity.

You would though, hypothetically, still maintain the storm surge, with a high tide this weekend.

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You would though, hypothetically, still maintain the storm surge, with a high tide this weekend.

There would still be plenty of issues for sure. In fact, even at a slow speed, it can still make landfall as a cat 1 with not too much problem so there is obviously some concern over a perfect track...but a high speed moving cat2/3 is obviously way more devastating in the eastern semi-circle.

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still don't have the quintessential NE hurricane pattern in place with that 5h expressway pointed right at us...but also can't ignore all the guidance at this point. feeling like at least some kind of meaningful effects will be felt.

an entertaining period of weather-watching upcoming, regardless. beats temperature debates.

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still don't have the quintessential NE hurricane pattern in place with that 5h expressway pointed right at us...but also can't ignore all the guidance at this point. feeling like at least some kind of meaningful effects will be felt.

an entertaining period of weather-watching upcoming, regardless. beats temperature debates.

You have to think the Euro's bizarre option of not moving it NE and instead moving due north won't verify. I have a hard time seeing it not moving east of north once it gets up into Virginia..but who knows.

I'd think a Euro/GFS combo might be a better solution.

Euro ensembles similiar to the op???

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You have to think the Euro's bizarre option of not moving it NE and instead moving due north won't verify. I have a hard time seeing it not moving east of north once it gets up into Virginia..but who knows.

I'd think a Euro/GFS combo might be a better solution.

Euro ensembles similiar to the op???

yeah pretty close...but actually east and closer to the op GFS later in the run. though i can't see the individual members so...

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