Re: They are waiting on NNE jog
Posted by Chris in Tampa on 8/26/2011, 6:43 am
The inner eyewall seems to be falling apart. This was the earlier vortex message at 4:26AM EDT:

URNT12 KNHC 260846 CCA
VORTEX DATA MESSAGE   AL092011
A. 26/08:26:40Z
B. 29 deg 15 min N
 077 deg 24 min W
C. 700 mb 2607 m
D. 67 kt
E. 304 deg 35 nm
F. 050 deg 80 kt
G. 304 deg 38 nm
H. 943 mb
I. 8 C / 3049 m
J. 19 C / 3053 m
K. 17 C / NA
L. OPEN ESE-S-W
M. C20
N. 12345 / 7
O. 0.02 / 1 nm
P. AF304 2409A IRENE              OB 22 CCA
MAX FL WIND 110 KT NE QUAD 07:00:00Z
MAX OUTBOUND FL WIND 84 KT W QUAD 08:42:20Z
MAX FL TEMP 20 C 278 / 6 NM FROM FL CNTR
BARELY HALF THE EYEWALL REMAINING.  STRONGEST FL WINDS NOW ASSOC WITH SPIRAL BAND
WHICH MAY BECOME NEW EYEWALL.

Decoded:

Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 26th day of the month at 08:46Z
Corrected: This observation corrected a previous observation.
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 304)
Storm Number & Year: 09L in 2011
Storm Name: Irene (flight in the North Atlantic basin)
Mission Number: 24
Observation Number: 22
A. Time of Center Fix: 26th day of the month at 8:26:40Z
B. Center Fix Coordinates: 29°15'N 77°24'W (29.25N 77.4W) (View map)
B. Center Fix Location: 211 miles (340 km) to the ENE (68°) from Melbourne, FL, USA.
C. Minimum Height at Standard Level: 2,607m (8,553ft) at 700mb
D. Estimated (by SFMR or visually) Maximum Surface Wind: 67kts (~ 77.1mph)
E. Location of the Estimated Maximum Surface Wind: 35 nautical miles (40 statute miles) to the WNW/NW (304°) of center fix
F. Maximum Flight Level Wind Inbound: From 50° at 80kts (From the NE at ~ 92.1mph)
G. Location of Maximum Flight Level Wind Inbound: 38 nautical miles (44 statute miles) to the WNW/NW (304°) of center fix
H. Minimum Sea Level Pressure: 943mb (27.85 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 8°C (46°F) at a pressure alt. of 3,049m (10,003ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 19°C (66°F) at a pressure alt. of 3,053m (10,016ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 17°C (63°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Open from the east-southeast to the south, W
M. Eye Shape & Diameter: Circular with a diameter of 20 nautical miles (23 statute miles)
N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Level: 700mb
O. Navigation Fix Accuracy: 0.02 nautical miles
O. Meteorological Accuracy: 1 nautical mile
Remarks Section - Remarks That Were Decoded...
Maximum Flight Level Wind: 110kts (~ 126.6mph) in the northeast quadrant at 7:00:00Z
Maximum Flight Level Wind Outbound: 84kts (~ 96.7mph) in the west quadrant at 8:42:20Z
Maximum Flight Level Temp: 20°C (68°F) which was observed 6 nautical miles to the W (278°) from the flight level center
Remarks Section - Additional Remarks...
BARELY HALF THE EYEWALL REMAINING. STRONGEST FL WINDS NOW ASSOC WITH SPIRAL BAND
WHICH MAY BECOME NEW EYEWALL.

----------

They suggest that the spiral band could become the new eyewall. I think the inner eyewall bounces around the outer spiral band/future eyewall which make it look more NNE than it actually is.

----------

5AM EDT and 11PM EDT tracks on this image:

206
In this thread:
They are waiting on NNE jog - Jackstraw, 8/26/2011, 1:57 am
< Return to the front page of the: message board | monthly archive this page is in
Post A Reply
This thread has been archived and can no longer receive replies.