Earlier this morning when the dropsonde splashed down at 9:08AM EDT on 10/17: 890mb
Posted by Chris in Tampa on 10/17/2010, 5:09 pm
The vortex was only recently released. The last pass opted not to go through the center. Maybe they didn't have enough time (it is a very long mission since the storm is very far from Guam) or maybe they planned it.



Decoded Vortex:

Product: Vortex Message (URPA12 PGUA)
Transmitted: 17th day of the month at 20:28Z
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 304)
Storm Number: 30
Storm Name: Megi (flight in the Northwest Pacific basin)
Mission Number: 8
Observation Number: 29
A. Time of Center Fix: 17th day of the month at 13:05:40Z
B. Center Fix Coordinates: 17°57'N 124°55'E (17.95N 124.9167E) (View map)
C. Minimum Height at Standard Level: 2,138m (7,014ft) at 700mb
D. Estimated (by SFMR or visually) Maximum Surface Wind: 165kts (~ 189.9mph)
E. Location of the Estimated Maximum Surface Wind: 10 nautical miles (12 statute miles) to the NNE (15°) of center fix
F. Maximum Flight Level Wind Inbound: From 100° at 177kts (From the E at ~ 203.7mph)
G. Location of Maximum Flight Level Wind Inbound: 11 nautical miles (13 statute miles) to the NNE (13°) of center fix
H. Minimum Sea Level Pressure: 890mb (26.28 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 8°C (46°F) at a pressure alt. of 3,037m (9,964ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 20°C (68°F) at a pressure alt. of 3,088m (10,131ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 14°C (57°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Closed Wall
M. Eye Shape & Diameter: Circular with a diameter of 16 nautical miles (18 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: 190kts (~ 218.6mph) in the northwest quadrant at 12:09:10Z
Remarks Section - Additional Remarks...
FREQUENT LIGHTNING IN EYEWALL

Raw Vortex:

URPA12 PGUA 172028
VORTEX DATA MESSAGE
A. 17/13:05:40Z
B. 17 deg 57 min N
 124 deg 55 min E
C. 700 mb 2138 m
D. 165 kt
E. 015 deg 10 nm
F. 100 deg 177 kt
G. 013 deg 11 nm
H. 890 mb
I. 8 C / 3037 m
J. 20 C / 3088 m
K. 14 C / NA
L. CLOSED WALL
M. C16
N. 12345 / 7
O. 0.02 / 1 nm
P. AF304 0830W  MEGI               OB 29
MAX FL WIND 190 KT NW QUAD 12:09:10Z
FREQUENT LIGHTNING IN EYEWALL
82
In this thread:
Typhoon MEGI - hanna, 10/15/2010, 9:51 am
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