New Vortex...917

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New Vortex...917

#1 Postby Air Force Met » Mon Sep 13, 2004 7:17 am

URNT12 KNHC 131149
VORTEX DATA MESSAGE
A. 13/1149Z
B. 20 DEG 17 MIN N
84 DEG 03 MIN W
C. 700 MB 2356 M
D. NA
E. NA
F. 215 DEG 132 KT
G. 126 DEG 012 NM
H. 917 MB
I. 12 C/ 3103 M
J. 20 C/ 3057 M
K. 16 C/ NA
L. CLOSED
M. C30
N. 12345/7
O. 0.1/1 NM
P. AF866 2809A IVAN OB 20
MAX FL WIND 153 KT NW QUAD 0827Z.


2 MB drop in 1.5 hours. Amazing given the structure of the storm needs improvement. Watch out when it does improve.
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#2 Postby Innotech » Mon Sep 13, 2004 7:21 am

the eyewall is closed, which means it has nearly completed another eywall replacement....look for honestly 165-170 mph winds soon.
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#3 Postby Aquawind » Mon Sep 13, 2004 7:30 am

Wow that is impressive considering the satelite presentation..Whata Monster..
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#4 Postby Air Force Met » Mon Sep 13, 2004 7:41 am

Aquawind wrote:Wow that is impressive considering the satelite presentation..Whata Monster..


Isn't it though? I mean it is maintaining cat 5 with a weak NW quad...and it is keeping ~920mb pressures at the bottom end of a cycle.
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#5 Postby canegrl04 » Mon Sep 13, 2004 7:43 am

170mph easily today :eek: :eek:
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#6 Postby Dean4Storms » Mon Sep 13, 2004 7:47 am

Have you also noticed the hurricane force winds have extended out to 105 miles now. This storm is alot bigger than Frances!!!
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#7 Postby Hyperstorm » Mon Sep 13, 2004 7:52 am

Dean4Storms wrote:Have you also noticed the hurricane force winds have extended out to 105 miles now. This storm is alot bigger than Frances!!!


I made a topic about this the other day that talked about this one resembling Frances in the Gulf of Mexico size-wise. Global models are forecasting it to grow bigger...STILL.
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Re: New Vortex...917

#8 Postby ricreig » Mon Sep 13, 2004 8:01 am

Air Force Met wrote:URNT12 KNHC 131149
VORTEX DATA MESSAGE
A. 13/1149Z
B. 20 DEG 17 MIN N
84 DEG 03 MIN W
C. 700 MB 2356 M
D. NA
E. NA
F. 215 DEG 132 KT
G. 126 DEG 012 NM
H. 917 MB
I. 12 C/ 3103 M
J. 20 C/ 3057 M
K. 16 C/ NA
L. CLOSED
M. C30
N. 12345/7
O. 0.1/1 NM
P. AF866 2809A IVAN OB 20
MAX FL WIND 153 KT NW QUAD 0827Z.


2 MB drop in 1.5 hours. Amazing given the structure of the storm needs improvement. Watch out when it does improve.


I think this translates to:

Storm IVAN: Observed By AF #866
Storm #09 in Atlantic Ocean
Maximum Flight Level Winds Were 153KT (175.95mph) In NW Quadrant At 0827Z
Date/Time of Recon Report: Monday, September 13, 2004 7:49:00 AM
Position of the center: 20° 17' N 84° 03' W
Minimum Height Measured At Standard Level Of 700mb: 2356m (Normal: 3011)
Maximum Surface Winds Were: Not Estimated
No Bearing From Center To Estimated Surface Winds Was Measured
Maximum Flight Level Winds Near Center Were 132KT (151.8mph) From 215°
Maximum Flight Level Winds Were Measured 012nm (13.799999999999999miles) From Center At Bearing 126°
Minimum pressure: 917mb (27.08in)
Eye Wall Was Characterized As Being: CLOSED
Eye Form Was Characterized As Being C30
Center Fix Established Using: Penetration Radar Wind Pressure Temperature
Center Fix Established At Level(s): 700mb
Navigational Accuracy Measured At 0.1nm
Meteorological Accuracy Measured At 1nm

My question is the maximum flight level winds...what does 175.95mph translate to at the surface?

Richard
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Re: New Vortex...917

#9 Postby Saitex » Mon Sep 13, 2004 8:08 am

Storm IVAN: Observed By AF #866
Storm #09 in Atlantic Ocean
Maximum Flight Level Winds Were 153KT (175.9mph 283.4km/h) In NW Quadrant At 0827Z
Estimated Max Surface Winds 137.7KT (158.4mph 255.0km/h) * undefined
Date/Time of Recon Report: Monday, September 13, 2004 07:49:00 (Mon, 13 Sep 2004 11:49:00 GMT)
Position of the center: 20° 17' N 84° 03' W (20.3°N 84.0°W)
Minimum Height Measured At Standard Level Of 700mb: 2356m (Normal: 3011)
Maximum Surface Winds Were: Not Estimated
No Bearing From Center To Estimated Surface Winds Was Measured
Maximum Flight Level Winds Near Center Were 132KT (151.8mph 244.5km/h) From 215°
Maximum Flight Level Winds Were Measured 012nm (13.8 miles) From Center At Bearing 126°
Minimum pressure: 917mb (27.08in)
Eye Wall Was Characterized As Being: CLOSED
Eye Form Was Characterized As Being Circular C30
Center Fix Established Using: Penetration Radar Wind Pressure Temperature
Center Fix Established At Level(s): 700mb
Navigational Accuracy Measured At 0.1nm
Meteorological Accuracy Measured At 1nm
* = Estimated Surface Winds are assumed 90% of Max Flight Level Winds

There's a newer version of that up at flhurricane that tells you.
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#10 Postby CFLCaneWatcher » Mon Sep 13, 2004 8:08 am

The NHC has had much previous discussion on the conversion of the Flight Level Winds in the past and it is basically different for each storm dependant on each ones characteristics.

My understanding is at present for Ivan the NHC is using an estimate of 90% of FLW to calculate the Surface Level Winds. So otherwise about 158 mph.
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Re: New Vortex...917

#11 Postby cloud_galaxy » Mon Sep 13, 2004 8:18 am

Still moving more westward than northward....

Last vortex was:
B. 20 DEG 13 MIN N
83 DEG 54 MIN W

this one is

B. 20 DEG 17 MIN N
84 DEG 03 MIN W

That's 4 min north, 9 min west.
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