2nd Vortex Message
Posted by CypressTX on 9/23/2010, 1:03 pm
Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 23rd day of the month at 16:55Z
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 309)
Mission Purpose: Investigate fifth suspect area (flight in the North Atlantic basin)
Mission Number: 1
Observation Number: 12
A. Time of Center Fix: 23rd day of the month at 16:30:40Z
B. Center Fix Coordinates: 13°48'N 75°56'W (13.8N 75.9333W)
B. Center Fix Location: 296 miles (476 km) to the S (169°) from Kingston, Jamaica.
C. Minimum Height at Standard Level: Not Available
D. Estimated (by SFMR or visually) Maximum Surface Wind: 28kts (~ 32.2mph)
E. Location of the Estimated Maximum Surface Wind: 8 nautical miles (9 statute miles) to the ENE (64°) of center fix
F. Maximum Flight Level Wind Inbound: From 86° at 33kts (From the E at ~ 38.0mph)
G. Location of Maximum Flight Level Wind Inbound: 62 nautical miles (71 statute miles) to the NE (44°) of center fix
H. Minimum Sea Level Pressure: 1008mb (29.77 inHg) - Extrapolated
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 23°C (73°F) at a pressure alt. of 206m (676ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 24°C (75°F) at a pressure alt. of 210m (689ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 13°C (55°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Not Available
M. Eye Shape: Not Available
N. Fix Determined By: Penetration, Wind, Pressure and Temperature
N. Fix Levels (sfc and flt lvl centers are within 5nm of each other): Surface and 1,500 feet
O. Navigation Fix Accuracy: 0.02 nautical miles
O. Meteorological Accuracy: 2 nautical miles
Remarks Section:
Maximum Flight Level Wind: 33kts (~ 38.0mph) in the northeast quadrant at 16:13:10Z
Sea Level Pressure Extrapolation From: Below 1,500 feet
Maximum Flight Level Temp: 25°C (77°F) which was observed 59 nautical miles (68 statute miles) to the NE (44°) from the flight level center


General Notes About Vortex Messages:
- Reported winds are usually averaged over a 10 second period. (NHC advisory wind speeds are the highest expected winds averaged over a 1 minute period.)
- The maximum flight level temperature outside the eye (item I.) "is taken just outside the central region of a cyclone (i.e., just outside the eyewall or just beyond the maximum wind band). This temperature may not be the highest recorded on the inbound leg but is representative of the environmental temperature just outside the central region of the storm."
- The maximum flight level temperature inside the eye (item J.) is the "maximum temperature observed within 5 nm of the center fix coordinates. If a higher temperature is observed at a location more than 5 nm away from the flight level center (item BRAVO), it is reported in Remarks, including bearing and distance from the flight level center."
(Quotes from National Hurricane Operations Plan - NHOP)

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Stage 4: Delivery - JAC, 9/23/2010, 7:09 am
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