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Danny (2015)


jburns

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Latest track guidences strongly suggest he misses the islands to the north, if he does and he doesnt get sheared to death then things get fun next weekend. The NHC track doesn't ever move a lot they walk it towards the trends at 5pm it will be on or just off the north coast of Dominican Republic if the guidance stays the same, this is at least to me a much more interesting future than the one painted previously....

 

 

 

 

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Seems to have 2 camps imo.  One bends Danny back to a much more westerly path passed 48 hours.. The other continues more or less with the same general heading after 48 hours.       How much it bends back to the west and how pronounced that bend is will determine how much effect the Islands will have on Danny.   

Of course the near term the biggest threat to Danny is the encounter with the shear its about to run across.

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Seems to have 2 camps imo.  One bends Danny back to a much more westerly path passed 48 hours.. The other continues more or less with the same general heading after 48 hours.       How much it bends back to the west and how pronounced that bend is will determine how much effect the Islands will have on Danny.   

Of course the near term the biggest threat to Danny is the encounter with the shear its about to run across.

 

Yep I wonder how much of that has to do with what kind of system the models have left after the shear, one would think the models that correctly have him deeper and stronger will be more NE as the shear will be better able to push him where as the models that have him weaker and shallow will be less influenced by the SW shear and thus further west. IF you split the difference on the tracks it would put him right in the pipeline for a potential SE threat...... Cloud tops look to be cooling again I hope he holds on with his current organization till the plane can get in there this afternoon. That plus the data from the G4 flight will do a lot to give us a idea if Danny is a legit threat to the islands or the US down the road. He really has been pretty steady the last 12 hrs or so and its nice to finally have something to watch out there, hell the way its been going he might the only show this year. 

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model guidance is likely too far south as they initialized danny as much weaker than it is. the current strengthening trend should cause danny to go north of the islands (if it survives).  models seem to be having trouble getting a feel for danny, maybe because of its small size?

 

The 12Z GFS run just initialized and it appears to have it as a 1008 MB low so its gonna most likely kill it off again, its off by at least 40 MB in strength most likely since the storm is prolly really around 970-975.

 

 

Edit to add the GFS run would appear to setup a pattern that would be favorable for Danny if it were to still exist after the shear to NOT recurve fast enough to not impact somewhere along the SE coast

 

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Hurricane hunters are finding strong winds and lots of dry air to the west of the storm per TWC. 

 

How much danny survives the dry air and shear is important but more importantly is where whatever remains tracks afterwards. If it gets blasted by the shear and dry air then goes over the bigger islands I doubt it survives at all. If it can move north of the islands and remain over water and survive then it could regenerate and get more interesting.

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Cat 3 per this info

 

Product: NOAA Vortex Message (URNT12 KWBC)
Transmitted: 21st day of the month at 16:55Z
Agency: National Oceanic and Atmospheric Administration (NOAA)
Aircraft: Lockheed WP-3D Orion (Reg. Num. N43RF)
Storm Number & Year: 04 in 2015
Storm Name: Danny (flight in the North Atlantic basin)
Mission: First flight of a sequence of non-tasked research missions into this system
Observation Number: 06
A. Time of Center Fix: 21st day of the month at 16:20:00Z
B. Center Fix Coordinates: 14°08'N 48°19'W (14.1333N 48.3167W)
H. Minimum Sea Level Pressure: 965mb (28.50 inHg) - Extrapolated
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 6°C (43°F) at a pressure alt. of 3,690m (12,106ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 21°C (70°F) at a pressure alt. of 3,321m (10,896ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 2°C (36°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Open in the south
M. Eye Shape & Diameter: Circular with a diameter of 12 nautical miles (14 statute miles)
N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Level: Other - Not surface, 1500ft, 925mb, 850mb, 700mb, 500mb, 400mb, 300mb or 200mb
O. Navigational Fix Accuracy: 1 nautical mile
O. Meteorological Accuracy: 4 nautical miles

Remarks Section:
Sea Level Pressure Extrapolation From: 12,000 feet
Maximum Flight Level Outbound and Flight Level Wind: 111kts (~ 127.7mph) which was observed 4 nautical miles to the NNE (26°) from the flight level center at 16:20:40Z​

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Unflagged 120 mph surface wind that last vortex drop and they missed the center which is why they got such a high surface wind speed and this was on the side that looks on sat to be the "weaker" side.​ Line D is the one showing the surface wind they got, its a solid Cat 3 right now.

 

 

Product: NOAA Vortex Message (URNT12 KWBC)
Transmitted: 21st day of the month at 17:19Z
Agency: National Oceanic and Atmospheric Administration (NOAA)
Aircraft: Lockheed WP-3D Orion (Reg. Num. N43RF)
Storm Number & Year: 04 in 2015
Storm Name: Danny (flight in the North Atlantic basin)
Mission: First flight of a sequence of non-tasked research missions into this system
Observation Number: 07
A. Time of Center Fix: 21st day of the month at 17:05:46Z
B. Center Fix Coordinates: 14°12'N 48°28'W (14.2N 48.4667W)
C. Minimum Height at Standard Level: Not Available
D. Estimated (by SFMR or visually) Maximum Surface Wind: 104kts (~ 119.7mph)
E. Location of the Estimated Maximum Surface Wind: 3 nautical miles (3 statute miles) to the NNE (19°) of center fix
F. Maximum Flight Level Wind Inbound: From 107° at 107kts (From the ESE at ~ 123.1mph)
G. Location of Maximum Flight Level Wind Inbound: 5 nautical miles (6 statute miles) to the NNE (16°) of center fix
H. Minimum Sea Level Pressure: 974mb (28.77 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 7°C (45°F) at a pressure alt. of 3,655m (11,991ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 25°C (77°F) at a pressure alt. of 3,010m (9,875ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 5°C (41°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Open in the south
M. Eye Shape & Diameter: Circular with a diameter of 18 nautical miles (21 statute miles)
N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Level: Other - Not surface, 1500ft, 925mb, 850mb, 700mb, 500mb, 400mb, 300mb or 200mb
O. Navigational Fix Accuracy: 1 nautical mile
O. Meteorological Accuracy: 1 nautical mile​

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Major!!

 

WTNT64 KNHC 211747
TCUAT4

HURRICANE DANNY TROPICAL CYCLONE UPDATE
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL042015
200 PM AST FRI AUG 21 2015

...NOAA HURRICANE HUNTER AIRCRAFT REPORTS THAT DANNY IS A MAJOR
HURRICANE...

Reports from a NOAA Hurricane Hunter aircraft indicate that Danny
is now a Category 3 Hurricane on the Saffir-Simpson Hurricane Wind
Scale.  The maximum winds are estimated to be 115 mph (185 km/h)
with higher gusts.

No additional intensification is expected, as Danny is moving into
an area of unfavorable upper-level winds, and a weakening trend is
expected to begin later today.  Consequently, no adjustment to the
forecast intensities from the previous advisory is required.

SUMMARY OF 200 PM AST...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...14.3N 48.6W
ABOUT 900 MI...1450 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...974 MB...28.76 INCHES

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Major!!

WTNT64 KNHC 211747

TCUAT4

HURRICANE DANNY TROPICAL CYCLONE UPDATE

NWS NATIONAL HURRICANE CENTER MIAMI FL AL042015

200 PM AST FRI AUG 21 2015

...NOAA HURRICANE HUNTER AIRCRAFT REPORTS THAT DANNY IS A MAJOR

HURRICANE...

Reports from a NOAA Hurricane Hunter aircraft indicate that Danny

is now a Category 3 Hurricane on the Saffir-Simpson Hurricane Wind

Scale. The maximum winds are estimated to be 115 mph (185 km/h)

with higher gusts.

No additional intensification is expected, as Danny is moving into

an area of unfavorable upper-level winds, and a weakening trend is

expected to begin later today. Consequently, no adjustment to the

forecast intensities from the previous advisory is required.

SUMMARY OF 200 PM AST...1800 UTC...INFORMATION

----------------------------------------------

LOCATION...14.3N 48.6W

ABOUT 900 MI...1450 KM E OF THE LEEWARD ISLANDS

MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H

PRESENT MOVEMENT...WNW OR 290 DEGREES AT 10 MPH...17 KM/H

MINIMUM CENTRAL PRESSURE...974 MB...28.76 INCHES

that is what I am talking about! I think chances are increasing of a possible threat to somewhere around the southeast, can it thread the needle?
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that is what I am talking about! I think chances are increasing of a possible threat to somewhere around the southeast, can it thread the needle?

 

Well the 12Z GFDL and HWRF both continue the trend of him surviving the shear and starting to get his act together again NORTH of the islands...if this is indeed what happens then there would be a chance for him to make it the the SE coast.....there is a trough at 240 hrs that gets about as far south as NC depending on how that effects him ( assuming there is a him ) will have a lot to do with where he ends up. This is all wild ass speculation though since that would be 7-10 days away.

 

Gonzo the G4 is up sampling the shear and dry air and that data will go a long way in letting us know how bad a hit Danny is about to take......it appears that both the dry air and shear are not as bad as they where modeled to be, add that to a storm much stronger than expected and maybe he does make it to the islands intact as a closed named storm.....if he does get north of the islands the water temps and shear forecast would lend themselves to strengthening.

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Well the 12Z GFDL and HWRF both continue the trend of him surviving the shear and starting to get his act together again NORTH of the islands...if this is indeed what happens then there would be a chance for him to make it the the SE coast.....there is a trough at 240 hrs that gets about as far south as NC depending on how that effects him ( assuming there is a him ) will have a lot to do with where he ends up. This is all wild ass speculation though since that would be 7-10 days away.

Gonzo the G4 is up sampling the shear and dry air and that data will go a long way in letting us know how bad a hit Danny is about to take......it appears that both the dry air and shear are not as bad as they where modeled to be, add that to a storm much stronger than expected and maybe he does make it to the islands intact as a closed named storm.....if he does get north of the islands the water temps and shear forecast would lend themselves to strengthening.

completely agree, where can I get this analyzed data once it comes out?
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I agree these are interesting to watch, but why on Earth would you pull for a hurricane to actually hit our coast? I live in SC and saw the damage of Hugo and no thanks.

same, but if it does end up like it would happen you might as well embrace it cause there is nothing that can be done to stop it.
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yeah, where is the shear at?

 

Try here...its not looking as bad as it did a day or so ago for Danny still a lot of shear but 15-20 knts is not nearly as bad as 30-40 knts......he seems to be feeling the effects or is undergoing some kind of ERC but I suspect it more related to the shear, you can see it really well on the NW corner of the outflow.

 

 

http://tropic.ssec.wisc.edu/real-time/windmain.php?&basin=atlantic&sat=wg8∏=shr&zoom=&time=

http://tropic.ssec.wisc.edu/real-time/windmain.php?&basin=atlantic&sat=wg8∏=sht&zoom=&time=

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