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Danny (2015)


jburns

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Danny's compact size makes it subject to significant fluctuations in

strength, both up and down, and such fluctuations are notoriously

difficult to forecast. Low-shear conditions are expected to

continue for the next 36 hours or so, which argues for some further

strengthening during that time. However, the cyclone continues to be

surrounded by dry mid-level air, which could penetrate into the core

and disrupt the intensification process. By 48 hours and beyond, the

vertical wind shear is forecast to become southerly to southwesterly

and increase to near 15 kt. As a result, Danny is expected to be

weakening as it approaches the Leeward Island. The official

intensity forecast calls for a peak intensity somewhat higher and

earlier than the previous advisory, ending up close to the IVCN

consensus model.

FORECAST POSITIONS AND MAX WINDS

INIT 20/1500Z 12.5N 44.8W 65 KT 75 MPH

12H 21/0000Z 13.1N 46.0W 70 KT 80 MPH

24H 21/1200Z 14.0N 47.6W 75 KT 85 MPH

36H 22/0000Z 14.7N 49.4W 75 KT 85 MPH

48H 22/1200Z 15.2N 51.5W 70 KT 80 MPH

72H 23/1200Z 16.0N 56.4W 65 KT 75 MPH

96H 24/1200Z 16.9N 61.7W 65 KT 75 MPH

120H 25/1200Z 18.0N 66.6W 55 KT 65 MPH

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If he keeps this current flare up going he will make a run at Cat 3 tonight, these small systems can ramp up and down quickly and he has 24 hrs or so till he reaches the shear that will start him on his downward spiral.....I suspect if he is to survive he will have to expand his windfield starting tomorrow when he encounters the shear and if he can do that he will be still around north of the islands. If he can get bigger he stands a better chance of maintaining his inner core once he gets into the shear. Looking better and the SW corner is really strengthening ATM

 

 

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IMO there is a near zero chance Danny gets to cat 3. He will have a hard enough time making it to a cat 2, although that wouldn't be shocking, still not likely. He's about to suck in some dry air and a buzz saw of shear is just to his west. He has a rough road ahead. We may have even seen the best of Danny he should be peaking over the next 12 hours or so IMO.

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IMO there is a near zero chance Danny gets to cat 3. He will have a hard enough time making it to a cat 2, although that wouldn't be shocking, still not likely. He's about to suck in some dry air and a buzz saw of shear is just to his west. He has a rough road ahead. We may have even seen the best of Danny he should be peaking over the next 12 hours or so IMO.

 

The core is pretty damn solid at this point and its to bad they cant get a plane in there right now I am sure they would have a 100-110 mph system on their hands at least......we probably will never know for sure how strong he gets since by the time the plane can reach him the shear should be taking its toll.....the next 12-18 hrs are his best window for the near future some of the latest MW imagery suggest a quickly deepening storm compared to just 6 hrs ago

 

 

Danny now

 

 

Danny 6 hrs ago

 

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The core is pretty damn solid at this point and its to bad they cant get a plane in there right now I am sure they would have a 100-110 mph system on their hands at least......we probably will never know for sure how strong he gets since by the time the plane can reach him the shear should be taking its toll.....the next 12-18 hrs are his best window for the near future some of the latest MW imagery suggest a quickly deepening storm compared to just 6 hrs ago

Danny now

attachicon.gifDanny 3.jpg

Danny 6 hrs ago

attachicon.gifdanny 2.jpg

Satellite can measure the intensity of storms pretty well. I think you're stretching things quite a bit saying the above. It was an 80mph storm at last update. Whatever the NHC puts out at 11 regarding intensity you can bet it's very close to reality. Dvorak is one technique using satellites and there are others as well. Part of the reason he looks so much better now is that other image was at DMIN.
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Which part exactly am I stretching it with? I agree SATS can put you in the ballpark but without a plane its tough to say if its 100 or 115 even with Dvorak and the other methods....I guess for practical purposes given its location its no big deal....I am gonna guess they will put him somewhere between 95-110 mph at 11 pm.

 

Structure is pretty good for a small system and he is getting really symmetrical now still can see a little southerly shear though

 

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Which part exactly am I stretching it with? I agree SATS can put you in the ballpark but without a plane its tough to say if its 100 or 115 even with Dvorak and the other methods....I guess for practical purposes given its location its no big deal....I am gonna guess they will put him somewhere between 95-110 mph at 11 pm.

 

Structure is pretty good for a small system and he is getting really symmetrical now still can see a little southerly shear though

 

attachicon.gifDanny 5 .gif

Saying its a 100-110. Mph storm at least. IMO that's a stretch. We will see in about 30 minutes. I've looked at some other satellite imagery and I don't see a high end 2 low end 3 right now.

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Thats a pretty solid IR look for the storm given its size, the eye is much bigger the last couple of frames and maybe that means its stabilizing now which would help with the storm being able to deepen faster.  I am surprised they kept him at 80 since the storm looks considerably better than it did at 5pm.....

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It's been my experience that intensifying storms with a clearing eye are usually low end cat 2 in intensity and the eye typically fully clears above 110mph or so. I would say based on this satellite image and presentation we have a 95-100mph hurricane and NHC is playing it conservative with intensity for the time being. It will likely be bumped up at 5am of the current look maintains itself or further organizes. This is not an 80mph storm IMO and is close to or is a low end cat 2.

post-2321-0-25469900-1440130070_thumb.pn

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From the NHC:

 

A NOAA aircraft will be conducting a research mission in and around Danny this afternoon, and an Air Force Reserve Unit reconnaissance aircraft will investigate Danny Saturday afternoon. These data will provide a better assessment of the intensity and structure of the hurricane.

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Looks like this one is going to fall apart.

 

Its hard to say right now cause none of the models have been initializing the storm very well, the last GFS run starts with a 1008 mb weak TS at best versus a well defined storm that is more likely 100-115 and somewhere in the 970's right now. The latest runs of the GFDL and HWRF both now have him surviving and north of the big islands....not saying its gonna happen but the trend in the models is for a the system to make it further west and north every run...in fact the latest GFDL ( initialized Danny at 985 currently ) has it as a cane north of the islands on the 06Z run this morning BUT there is plenty of time for that to change again so we need to see if its a trend or just one run.

 

 

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Sure looks good on the visible at the moment...

 

http://www.ssd.noaa.gov/PS/TROP/floaters/04L/imagery/vis_lalo-animated.gif

 

Yeah doubt that is just a  85 mph hurricane, especially given its small size. Its also expanding in size just a little, and you can see the shear out there around 54W waiting on him and that's gonna beat the hell out of him.

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First Danny isnt going to the GOM, models have and will contine to trend north. Thats good though because the Caribbean Sea equals death by shear and a track over the big islands is also fairly good for wrecking a storm....this thing has a better chance of being a fish storm than it does being something that goes into the GOM. The shear ahead is potent but not to "thick" if he can make it through it with his well organized circ intact he stands a decent chance of restrengthening north of the islands with really warm water an light shear forecasted for that time frame, so the next 24-36 hrs will be the worst conditions he has to deal within the foreseeable future.

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Up to 105 mph now, also the shear forecasted to "only" be 20 knts this is weaker than the earlier 30-40 knts that was out in front of him, 20 knts ought to be enough to really mess him up though. new track also ticked north a bit and I expect this will continue as the NHC track is on the southern end of guidence now.

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