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Major Hurricane Irma


NJwx85

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2 minutes ago, StormChaser4Life said:

Def possible. The conditions present should at least maintain it or slow weakening. Who thinks it will make landfall as a cat 5 in FL?

It has way better odds than most hurricanes, that's for sure.  Only a few US landfalls as cat 5 with 2 of them in Florida, so it's a bit tough to call for it with high confidence, but can't say it would be surprising.

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3 minutes ago, OUGrad05 said:

yea there is

http://www.ssd.noaa.gov/goes/east/pr/h5-mloop-wv.html

Core is holding up well i agree with you on that but looking at WV and other products its pretty clear that there is some dry air in the system and that its weakened some which recon data is verifying

Fluctuations in convective intensity in the CDO ≠ dry air intrusion.

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1 minute ago, OUGrad05 said:

yea there is

http://www.ssd.noaa.gov/goes/east/pr/h5-mloop-wv.html

Core is holding up well i agree with you on that but looking at WV and other products its pretty clear that there is some dry air in the system and that its weakened some which recon data is verifying

 

that's about as moist an envelope as you'll see.  

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ERC likely the cause of eliptical eye:

 

Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 8th day of the month at 1:26Z
Agency: United States Air Force 
Aircraft: Lockheed WC-130J Hercules with reg. number AF99-5309 
Storm Number & Year: 11 in 2017
Storm Name: Irma (flight in the North Atlantic basin)
Mission Number: 18
Observation Number: 09 ( See all messages of this type for this mission. )
A. Time of Center Fix: 8th day of the month at 0:55:40Z
B. Center Fix Coordinates: 21°09'N 72°03'W (21.15N 72.05W)
B. Center Fix Location: 63 statute miles (101 km) to the WSW (249°) from Cockburn Town, Turks and Caicos Islands (U.K.).
C. Minimum Height at Standard Level: 2,395m (7,858ft) at 700mb
D. Estimated (by SFMR or visually) Maximum Surface Wind Inbound: 97kts (~ 111.6mph)
E. Location of the Estimated Maximum Surface Wind Inbound: 7 nautical miles (8 statute miles) to the SW (220°) of center fix
F. Maximum Flight Level Wind Inbound: From 306° at 107kts (From the NW at ~ 123.1mph)
G. Location of Maximum Flight Level Wind Inbound: 10 nautical miles (12 statute miles) to the SW (222°) of center fix
H. Minimum Sea Level Pressure: 921mb (27.20 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 9°C (48°F) at a pressure alt. of 3,056m (10,026ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 18°C (64°F) at a pressure alt. of 3,027m (9,931ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 8°C (46°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Closed 
M. Eye Shape: Elliptical (oval shaped)
M. Orientation of Major Axis in Elliptical Eye: 300° to 120° (WNW to ESE)
M. Length of Major Axis in Elliptical Eye: 22 nautical miles (25 statute miles)
M. Length of Minor Axis in Elliptical Eye: 16 nautical miles (18 statute miles)
N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Level: 700mb
O. Navigational Fix Accuracy: 0.02 nautical miles
O. Meteorological Accuracy: 1 nautical mile

Remarks Section:
Maximum Flight Level Wind: 146kts (~ 168.0mph) which was observed 10 nautical miles (12 statute miles) to the NNE (25°) from the flight level center at 23:38:30Z
Maximum Flight Level Wind Outbound: 140kts (~ 161.1mph) which was observed 14 nautical miles (16 statute miles) to the NE/ENE (56°) from the flight level center at 0:59:30Z
Dropsonde Surface Wind at Center: From 215° at 7kts (From the SW at 8mph)

 
 
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Judging by the last recon pass the Turks and Caicos should "only" be experiencing category 2 winds. Which, yeah that's really bad, but not something they aren't familiar with. The surge and waves are another matter entirely and that's definitely the real threat. However, at least they aren't also dealing wiht 175mph winds.

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2 minutes ago, OUGrad05 said:

yea there is

http://www.ssd.noaa.gov/goes/east/pr/h5-mloop-wv.html

Core is holding up well i agree with you on that but looking at WV and other products its pretty clear that there is some dry air in the system and that its weakened some which recon data is verifying

 

It's pretty clear that dry air is not the issue really, as even seen on that loop.

 

Core organization is likely the main issue right now, given the recently posted MW pass.

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Just now, Hoosier said:

Insane amount of nitpicking about this storm.  Like it was actually going to maintain 185 mph winds endlessly.

Thats the point really, minor changes in the environment should serve to bring speeds down from 185mph which is exactly what's happening.  Such a storm is extremely rare and fragile really because of all the factors that have to align to be at 185mph.  We'll see if it gets there again.

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Just now, Hoosier said:

Insane amount of nitpicking about this storm.  Like it was actually going to maintain 185 mph winds endlessly.

seriously, I'm shocked that she has remained a category 5 for so long. isn't she breaking/close to breaking some records in regard for intensity for such a long duration

 

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2 minutes ago, Ralph Wiggum said:

Once she hits about 78W and we start seeing the trajectory take on more of a N component is when we will really know if Irma is going to make one last strong attempt at reintensification as she approaches LF. 

...re-intensification from a high-end 4/low-end 5 back to flirting with basin/global records. Scary.

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17 minutes ago, StormChaser4Life said:

I'm honestly not sure why Irma isn't exploding now. Not really land interaction at the moment. Little to no shear. Very warm waters. I do see the clouds warming somewhat. But eye still looks great. Based on its current trajectory looks like it could graze Cuba. Wondering when it will start going more N than W

Irma is pretty damn near the theoretical maximum for hurricanes in that part of the world.  There's no where left to explode to.  The fact that it's maintaining the strength it is for so long is astounding. 

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1 minute ago, Hoosier said:

It has way better odds than most hurricanes, that's for sure.  Only a few US landfalls as cat 5 with 2 of them in Florida, so it's a bit tough to call for it with high confidence, but can't say it would be surprising.

Was it the Labor Day Hurricane and Andrew? I think Andrew was last cat 5 landfall in the US if I'm not mistaken. It has ample warm water to fuel it but increasing shear will offset that some

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