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NE Tropical Thread


free_man

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  On 8/19/2012 at 12:05 PM, CT Blizz said:

Raleighwx says chances of recurve lessening...Folks need to start paying attn to this..

  On 8/19/2012 at 12:41 PM, CT Blizz said:

Can you hear it?

Allan Huffman@RaleighWx

Global models weaker with Invest94 and thus a further west track. At day 8, 6z GFS Ensemble members clusterin western Bahamas.

  On 8/31/2012 at 4:31 PM, CT Blizz said:

KFS

  On 8/31/2012 at 4:44 PM, CT Blizz said:

When Alan speaks...folks should listen..he's good

Deja Weenie for Kevin.

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  On 8/31/2012 at 4:42 PM, CT Rain said:

The GFS has 2 nice mid west troughs dropping down that match the loading pattern for SNE hurricanes. Part 1 is there... that's the easy part... now part 2 - getting a major hurricane in the perfect spot needs to fall into place.

Yeah that's a case where everything has to be at the right place at the right time since it's a little too far east. I think we also need to remember global models sometimes trend a little too far west...or capture the storm a little too much when ever they try to make it more baroclinic.

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  On 8/31/2012 at 4:53 PM, CT Rain said:

Given the SSTs it's impossible IMO to have a cat 4 or 5 hit SNE.

Yeah, That's is always the case, Even this year with SST's above normal, Its still not like being in the tropics where temps are in the 80's, These tropical systems are usually trucking when they get to this lat

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  On 8/31/2012 at 4:53 PM, CT Rain said:

Given the SSTs it's impossible IMO to have a cat 4 or 5 hit SNE.

I believe 1635 sets the precedent as the only "at least" strong 3 or more likely cat 4 to strike SNE. So not sure I agree, but you're the expert.

iirc the pressure was estimated high 930mb.

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  On 8/31/2012 at 4:58 PM, BIrving said:

I believe 1635 sets the precedent as the only "at least" strong 3 or more likely cat 4 to strike SNE. So not sure I agree, but you're the expert.

iirc the pressure was estimated high 930mb.

I doubt it was a legit 4.

I could see a strong cat 3... but getting sustained winds at that level is next to impossible here. One of the reasons why is the cooler SSTs will help stabilize the lower boundary layer making it more challenging to mix down the strongest winds at the top of the BL.

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  On 8/31/2012 at 5:01 PM, CoastalWx said:

I have a hard time with accounts from colonial times. They are often exaggerated.

From what I've see 1635 was worse than 1938. It's hard to fathom an actual category 4 in the current climate regime. I don't think it's physically possible.

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  On 8/31/2012 at 5:07 PM, BIrving said:

There is a little more science behind that than just colonial accounts and the usual mythology. If a '38 was possible with a high-end cat 3, I'd imagine a low end cat 4 is not impossible. Maybe, maybe not.

Well in 1635, it's hard to find anything more than written accounts.

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  On 8/31/2012 at 5:09 PM, CoastalWx said:

Well in 1635, it's hard to find anything more than written accounts.

I believe they can tell what surge and such was like too though from the sediment cores....they found a layer of sand pretty far inland in RI...that surpassed 1938....but there is still uncertainty on resolving the strength of that hurricane from that alone.

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If the Hurricane models are at least reasonable correct, Leslie will actually be farther northeast at Day 5 than what is ideal of Bermuda hurricane hit, which is favored from the due south. However, higher the normal north-western Atlantic to Nova Scotia 500mb heights could compensate for that deviation from climo. Shear actually becomes quite unfavorable in the day 4 to 5 range, but both the EC and the GFS greatly improve synoptic conditions onward as a upper level anticyclone builds over Leslie. This really when the EC and the GFS show an intensifying, large hurricane.

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  On 8/31/2012 at 5:12 PM, ORH_wxman said:

I believe they can tell what surge and such was like too though from the sediment cores....they found a layer of sand pretty far inland in RI...that surpassed 1938....but there is still uncertainty on resolving the strength of that hurricane from that alone.

I mean more from that time, but yeah I think Steve brought that up before. Like you said...it's tough to figure out how strong it was.

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  On 8/31/2012 at 5:12 PM, ORH_wxman said:

I believe they can tell what surge and such was like too though from the sediment cores....they found a layer of sand pretty far inland in RI...that surpassed 1938....but there is still uncertainty on resolving the strength of that hurricane from that alone.

but as we have seen with Ike and Isaac, surge does not tell the intensity.We will never know what the wind speed, baro were, all we know is that 1635 and 1815 had bigger surge than 38.

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  On 8/31/2012 at 5:22 PM, CoastalWx said:

I kind of don't get the big excitement for lessons learned from Issac...etc. Yes the SS scale is not perfect, but what good is it to have a scale for every hazard? I thought the experimental impacts page was perfect.

It's sort of getting annoying. The system should have worked. The message was out and evacuations were ordered. Should people chauffeur you out of a storm surge zone next time?

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