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EPAC Tropical Action 2011


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I think we can safely consider this one to be an overachiever.

Yep. A landfalling babycane is pretty cool in the EPAC in June.

My one bit of angst around this is the lack of data from Manzanillo. The city was definitely in the inner core, and it's just a shame that neither weather station was reporting. Hopefully data were collected-- just not communicated.

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Yep. A landfalling babycane is pretty cool in the EPAC in June.

My one bit of angst around this is the lack of data from Manzanillo. The city was definitely in the inner core, and it's just a shame that neither weather station was reporting. Hopefully data were collected-- just not communicated.

Did you check wunderground? I would but I am still internetless on my computer. Maybe someone's home station got some cool readings.

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I think Adam nailed the 12z peak intensity... its obviously fallen apart since due to land interaction and cooler waters currently.

It looks like it's really sped up and hooked left. I mean, that is way offshore, whereas the latest advisory (from just a couple of hours ago) still had it onshore.

It definitely looks like it's unraveling a bit now.

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Yep, I checked the two official reporting stations on Wunderground-- repeatedly-- and there were just no data coming through. :(

Check past days. They go to sleep, they're manual stations, business hours are from 7:45am to 8:50 pm. Nobody is gonna stay because of a wussy 'cane

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Check past days. They go to sleep, they're manual stations, business hours are from 7:45am to 8:50 pm. Nobody is gonna stay because of a wussy 'cane

Ugh. What a bummer. You'd think someone there would be interested enough to man a wx station during a hurricane. Call it a "wussycane"-- but the city has not had a direct hit in 15 years. The data would have been valuable.

P.S. Even the airport isn't collecting continuous data? I kind of assumed that it would.

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Ugh. What a bummer. You'd think someone there would be interested enough to man a wx station during a hurricane. Call it a "wussycane"-- but the city has not had a direct hit in 15 years. The data would have been valuable.

P.S. Even the airport isn't collecting continuous data? I kind of assumed that it would.

Don't know, but I have a feeling they didn't. The wussy cane remark was my impersonation of the station operator.

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The 8 am PDT package is out. The cyclone has turned to the NW and is weakening, as we suspected. Winds are down to 70 kt.

The Discussion doesn't actually mention any landfall-- it says simply:

THE CENTER OF BEATRIZ MOVED VERY CLOSE TO THE COAST OF MEXICO OVER THE PAST FEW HOURS...AND INTERACTION WITH LAND APPEARS TO HAVE CAUSED SOME WEAKENING.

However, the 5 am position was onshore. I wonder how they'll count it in the end.

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Is the cyclone becoming seriously decoupled or something? Because the IR center looks to be W of the advisory position, which is less than ~20 mi offshore. Or is that a dry slot?

Yep... visible imagery shows the best low level turning east than the blob of Convection on IR... defiantly some decoupling going on right now between the surface and upper levels. In fact, it looks like the surface circulation might have been disrupted by the high Mexican terrain because its really hard to pick out a center right now. Maybe the GFS EnKF is scoring a coup?

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Yep... visible imagery shows the best low level turning east than the blob of Convection on IR... defiantly some decoupling going on right now between the surface and upper levels. In fact, it looks like the surface circulation might have been disrupted by the high Mexican terrain because its really hard to pick out a center right now. Maybe the GFS EnKF is scoring a coup?

OK, thanks. I was going to say, it's getting a bit messy looking.

.

Thanks for posting this. Two things I've gleaned from it: 1) the structure really deteriorated as it skimmed the coast and 2) it's not clear to me that it actually made landfall-- seems like the center of the eye might have stayed just offshore.

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ive always thought the frictional effect of land on a canes circulation would act to pull it inland, especially when the cane is moving slowly.

I agree with you. Just look at Ivan 2004 go around Jamaica.

As for beatriz it peaked near the coast, but then went to crap as it moved away. I think there is a effect near land that helps not only to tighten a cyclone, but to shield it from shear with very high sst's that only close to shore can provide.

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Besides whatever frictional affects from land, and drier air drawn down from the mountains, Beatriz is near a pretty sharp SST gradient and isn't far from stable air strato-cu. No surprises, would have lasted a little longer, I suppose, if not for the land interaction.

2011171epsst.png

post-138-0-46746700-1308683145.jpg

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The GFS EnKF is basically showing Beatriz dissipating by tomorrow evening. That's pretty close to the Euro solution, too. Should be interesting to watch.

GFS KnKF scores a major coup!

From 80mph hurricane to dissipated in 12 hours.

APPARENTLY...THE INTERACTION OF BEATRIZ WITH THE MOUNTAINOUS TERRAINOF MEXICO EARLY TODAY HAS DEALT A LETHAL BLOW TO THE TROPICALCYCLONE. AN ASCAT PASS FROM AROUND MIDDAY INDICATED THAT THERE WASNO LONGER A WELL-DEFINED SURFACE CENTER OF CIRCULATION...AND THATTHE MAXIMUM WINDS HAD DECREASED EVEN FASTER THAN EARLIER ESTIMATED. THE SYSTEM ALSO HAS LACKED DEEP CONVECTION FOR THE PAST 10 HOURS ORSO. THEREFORE...BEATRIZ HAS DISSIPATED AND THIS IS THE LASTADVISORY.

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Yeah. I'm excited to see what happens over the next 24 hours. I went for a peak at 12z tomorrow, then rapid weakening after with a remnant low by 12z Thursday.

I can't believe that this forecast missed by 33 hours. I think I was the most aggressive one out there.

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The GFS EnKF was the most aggressive, but I think you'd have to give the GFS op and Euro some credit here, too.

Yea no doubt... in any event, it was a major victory for the dynamical models over statistical guidance. This certainly gives me hope that we might finally be starting to beat statistical intensity guidance on a consistent basis.

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Yea no doubt... in any event, it was a major victory for the dynamical models over statistical guidance. This certainly gives me hope that we might finally be starting to beat statistical intensity guidance on a consistent basis.

I've been arguing since last year that the global dynamical models are now pretty skillful at determining d(intensity)/dt. Obviously, they're not going to get the absolute wind speeds right, but I've been using them successfully for relative intensity changes for the last year.

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