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Atlantic Tropical Action 2011 - Part III


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155 years ago today the Last Island Hurricane was gathering steam and preparing to slam into Louisiana....130 kts, 934 mb and not weakening at landfall.

That'd be nice.

Yep-- and the RMW of ~10 nmi suggests a tight little cutiecane deal.

P.S. Nice to see Wikipedia reflecting the post-reanalysis findings. Cool.

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Yep-- and the RMW of ~10 nmi suggests a tight little cutiecane deal.

P.S. Nice to see Wikipedia reflecting the post-reanalysis findings. Cool.

It would of been great to track something like that (on the ground). I'm sure it looked impressive from space, microcanes are like the microbursts of the tropical world.

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Quick note:

I've always considered 10 August to be the real start of the season. That's tomorrow. So I just wanted y'all to know I better see a real cyclone soon. Otherwise, this here thread host is gonna be meting out punishments and citations and all kinds o' hurtyhurtz.

So get to work if y'all don't want things to get ugly around here.

Just sayin'. :sun:

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Quick note:

I've always considered 10 August to be the real start of the season. That's tomorrow. So I just wanted y'all to know I better see a real cyclone soon. Otherwise, this here thread host is gonna be meting out punishments and citations and all kinds o' hurtyhurtz.

So get to work if y'all don't want things to get ugly around here.

Just sayin'. :sun:

There's gonna be some activity soon!once!!!111!! there's gonna be a hybrid moving NE towards north of Bermuda...we have Emily remnants and a couple of 12N+ disturbances off Africa. Yay!

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Folks,

The 0Z gfs and its ensemble mean are both saying "turm out the lights, the -NAO is over" in about 4-5 days and even bring in positive 500 mb anomalies in the far NW Atlantic and the Canadian Maritimes. If I'm not mistaken, this makes it more favorable than average for a mainly NE US hit (as opposed to SE US). Of course, I'm not saying it would be likely as hits there are VERY rare. Also, it doesn't appear to be there in time for 92L. However, followup systems could make late August very interesting!

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I'm thinking that 92L could well be Tropical Storm Franklin, although I have a feeling it may take a longer time to spin up to a hurricane than the models show. My bigger concern would be future 93L which I think could become Hurricane Gert, and a much more serious prospect for a threat.

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The convective cluster just inside the Caribbean, that left behind a naked swirl a couple days back near 50ºW, looks remarkably good for a blob in the Eastern Caribbean. Not much model love, but blob watching is one of my hobbies.

This season has seen more naked girls than my damn computer....uh, whoops...uh, I mean naked SWIRLS....yeah SWIRLS. :arrowhead::whistle:

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Is there really any merit to the claims that we're heading into a favorable period for Mid-Atlantic/SNE threats?

That would depend on who's claiming it. I don't see any reason for a specific Mid-Atlantic/SNE threat increase.

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Is there really any merit to the claims that we're heading into a favorable period for Mid-Atlantic/SNE threats?

Well, if the NAO is going to go positive. That would be climatological more favorable for Mid-Atlantic/SNE threats but it doesn't guarantee a hit.

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Well, if the NAO is going to go positive. That would be climatological more favorable for Mid-Atlantic/SNE threats but it doesn't guarantee a hit.

Agreed. I counted ~18 DIRECT H strikes since 1851 or about one every 9 years for the coast from VA to ME. So, the chances in any year for, say, a direct hit from a hurricane from VA northward are probably in the general neighborhood of 11% on average based on the last 160 years of data. Even if conditions (NAO, AMO, or whatever) were to make things super favorable vs. the norm.... say, ~three times as favorable for a direct hit there in a particular year, you're still talking only ~a one in three shot at a DIRECT hit for the entire area from VA to ME....so the odds would still be against it even in this hypothetical relatively very favorable scenario. This makes predicting that there will be an actual direct hit there in any one year very difficult. Now, predicting that there'd be one over the next 3-5 years or whatever based on expectations of very favorable conditions for the next few years ...that's a different story and something that is reasonable.

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Now, predicting that there'd be one over the next 3-5 years or whatever based on expectations of very favorable conditions for the next few years ...that's a different story and something that is reasonable.

The best you could really do is some kind of probability scheme based on forecast conditions, and past storm behavior in analog years.

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Truncation sucks.

I don't think 92L actually provides a path for future Gert to recurve as implied, and the best one can hope for a week out is the GFS could be hinting at a SE USA/Florida threat in a little over a week.

Its actually an encouraging sign that the model has a hard time recurving 92L, so that it would be in position to open an escape route for future Gert.

post-138-0-26450700-1312994360.gif

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A new wave has splashed into the E Atlantic riding along 10N. It has gained a pouch designation of P15L...

avn-l.jpg

SYNOPSIS 2011081000

P15L

11N, 10W

700 hPa

ECMWF: After moving off of Africa and weakening slightly, P15L then intensifies into the strongest storm of the season so far. It maintains at least 15 degrees separation to the southeast of P14L/92L.

GFS: Gradually intensifies.

UKMET: Faster than other models, and UKMET does not intensify P15L much.

NOGAPS: OUTLIER! P15L crawls off the African coast and eventually dissipates, becoming only an OW max after 84 hours.

HWRF-GEN: Similar to ECMWF. The only difference is that at later periods, HWRF-GEN depicts a much smaller, compact area of high OW values close to the center of a large pouch.

ECMWF -7.3 v700 & TPW 120h

GFS -7.6 v700 & RH/TPW 120h

UKMET -8.4 v700 & RH 120h

NOGAPS -4.3 v700 108h

HWGEN -6.6 v700 & RH 120h

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