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Hermine


LakeEffectKing

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Been faked out before, but maybe this is finally it. Looks to be a big blowup right over the LLC.

Looks like for whatever reason this loop is slightly delayed.

You can see a much larger blowup on these loops.

http://www.ssd.noaa.gov/PS/TROP/floaters/09L/imagery/wv_lalo-animated.gif

http://www.ssd.noaa.gov/PS/TROP/floaters/09L/flash-vis-short.html

 

td93.gif

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Glad to see recon data returned after a 30-40 minute data gap. Max FL wind found so far has been 34 knots, which translates to around 30 knots at the surface. Pressure has been relatively steady all day from the early morning flights through now with 1003-1005 millibars. We'll see what happens, but until we see some sort of unforeseen intensification I'd stick with a strong TS at landfall. I'm sure 99L/9 has a few more surprises in store for us though. The biggest story may end up being the flooding rains across Florida. A good stretch of the state could pick up 5 to 10 inches of rain with localized amounts up to 15" possible. Strong tidal surges will be an issue too as we head toward a holiday weekend in the Gulf. 

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NHC now entertaining the idea of a Cat 1 Hurricane

The system has still not become better organized on satellite imagery, with limited evidence of banding features. There is an apparent mid-level center of circulation located south of the low-level center. The highest flight-level wind reported by a NOAA Hurricane Hunter aircraft was 34 kt and the highest SFMR-observed surface winds were 30 kt, which continues to be used for the advisory intensity. There is some evidence of increasing upper-level outflow to the north. The latest intensity guidance is a little more aggressive than before, with a little less shear forecast over the northern Gulf coast region. The official intensity forecast has been increased slightly in comparison to the previous one, and is a little below the latest model consensus. Given that a couple of the models show the system becoming a hurricane, and the 48-hour forecast point implies tropical-storm-force winds near the coast, it is prudent to issue a hurricane watch for a portion of the northeast Gulf of Mexico coast at this time. Fixes from the NOAA aircraft show that the initial motion is northwestward, or 320/4 kt. The global models continue to show a mid-tropospheric trough developing over the southeastern United States during the next couple of days. This should cause the tropical cyclone to turn toward the north and north-northeast in 24-48 hours. The dynamical track guidance models have shifted a bit to the west compared to their earlier runs, as has the multi-model consensus. Therefore the official track forecast is also west of the previous one. It is important not to focus on the forecast landfall point of this system. Among other reasons, dangerous storm surge flooding is likely along the coast well to the east and south of the path of the center.

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8 minutes ago, David Reimer said:

First storm surge watch issued from Spring Hill, FL north to east of Panama City Beach, FL. The NHC discussion emphasised a significant storm surge may impact a good chunk of the FL Gulf Coast with Hermine. 

It should be noted that for this season, the storm surge watches and warnings are experimental. After a public comment/review period, they would become part of the official watches and warnings next season. Overall though, it will be a good test for the new watches and warnings. 

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4 minutes ago, rockchalk83 said:

It should be noted that for this season, the storm surge watches and warnings are experimental. After a public comment/review period, they would become part of the official watches and warnings next season. Overall though, it will be a good test for the new watches and warnings. 

I think it's assumed there gonna be added since the NWS added them to the SAME codes, and new weather radios have the event codes for Storm Surge Watch/Warnings added as well as the Extreme Wind Warning.

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3 minutes ago, wxmx said:

Another convection blowup near/over the center, which appears to be pinwheeling around the MLC. Let's see if recon can confirm it. Overall it appears on the brink of TS strength.

 

That problem will need to be fixed if this is going to strengthen significantly.

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7 minutes ago, wxmx said:

Another convection blowup near/over the center, which appears to be pinwheeling around the MLC. Let's see if recon can confirm it. Overall it appears on the brink of TS strength.

MLC AND LLC are noticeably more close together today than they have been for over a week. System is starting to look more Tropical Storm'esque on Vis. Sat. Outflow looks pretty beautiful...

 

Overall is still crap though. But getting better. Like amped said above, this system isn't going to do much without the MLC/LLC overlapped. 

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2 minutes ago, jojo762 said:

MLC AND LLC are noticeably more close together today than they have been for over a week. System is starting to look more Tropical Storm'esque on Vis. Sat. Outflow looks pretty beautiful...

 

Overall is still crap though. But getting better.

Agree. The reason this is looking better is this:

wg8sht.GIF

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In addition to the system gaining a northward component, it looks from satellite that the shearing upper level wind may have veered just a bit more ssw'erly versus the sw'erly earlier.  The combination of those two factors seems to be lessening the shear and allowing better convective development close to the center.

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4 minutes ago, hawkeye_wx said:

In addition to the system gaining a northward component, it looks from satellite that the shearing upper level wind has veered just a bit more ssw'erly versus the sw'erly earlier.  The combination of those two factors seems to be lessening the shear and allowing better convective development close to the center.

Actually, it's losing latitude. Recon is about to confirm that, but they are currently south of the last fix. South, as you can see in the shear map I posted, is where the shear is lower.

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2 minutes ago, wxmx said:

Agree. The reason this is looking better is this:

wg8sht.GIF

If the centers ever begin to overlap, like let's say tonight (doubt it though), this could start up in a hurry it seems. Still not likely to see RI, but modest intensification into a cat 1. Either way, a large portion of Florida is going to get inundated with tropical moisture (it already is really.) 

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First storm surge watch issued from Spring Hill, FL north to east of Panama City Beach, FL. The NHC discussion emphasised a significant storm surge may impact a good chunk of the FL Gulf Coast with Hermine. 



The whole "Forgotten Coast" is super susceptible to surge issues even from a marginal TS. Leading the way has to be Cape San Blas in Gulf county. It's such a little spit of land that separates St Joe Bay from the GOM. An area known as the Stump Hole over washes quite regularly. Any sort of hit or near miss on the Cape will lead to the area being cut off from the mainland.


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2 minutes ago, wxmx said:

Actually, it's losing latitude. Recon is about to confirm that, but they are currently south of the last fix. South, as you can see in the shear map I posted, is where the shear is lower.

Looks like a wobble. Nevertheless the system is still decoupled and only hope would be for the system to loose it's MLC and generate a new one. 

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2 minutes ago, NavarreDon said:

 


The whole "Forgotten Coast" is super susceptible to surge issues even from a marginal TS. Leading the way has to be Cape San Blas in Gulf county. It's such a little spit of land that separates St Joe Bay from the GOM. An area known as the Stump Hole over washes quite regularly. Any sort of hit or near miss on the Cape will lead to the area being cut off from the mainland.


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Debbie hit that area in 2012, Alberto in 2006 and Frances in 2004.  I didn't hear of the first two of those doing considerable damage.

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