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Here is the 988mb Vortex

Posted by Chris in Tampa on 10/7/2017, 12:15 am

Describes the eye.

Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 7th day of the month at 3:55Z
Agency: United States Air Force
Aircraft: Lockheed WC-130J Hercules with reg. number AF98-5307
Storm Number & Year: 16 in 2017
Storm Name: Nate (flight in the North Atlantic basin)
Mission Number: 7
Observation Number: 22
A. Time of Center Fix: 7th day of the month at 3:16:30Z
B. Center Fix Coordinates: 22°26'N 86°10'W (22.4333N 86.1667W)
B. Center Fix Location: 98 statute miles (158 km) to the NNE (27°) from Cancún, Quintana Roo, Mexico.
C. Minimum Height at Standard Level: 1,323m (4,341ft) at 850mb
D. Estimated (by SFMR or visually) Maximum Surface Wind Inbound: 60kts (~ 69.0mph)
E. Location of the Estimated Maximum Surface Wind Inbound: 32 nautical miles (37 statute miles) to the E (84°) of center fix
F. Maximum Flight Level Wind Inbound: From 152° at 89kts (From the SSE at ~ 102.4mph)
G. Location of Maximum Flight Level Wind Inbound: 29 nautical miles (33 statute miles) to the E (88°) of center fix
H. Minimum Sea Level Pressure: 988mb (29.18 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 17°C (63°F) at a pressure alt. of 1,521m (4,990ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 22°C (72°F) at a pressure alt. of 1,527m (5,010ft)
K. Dewpoint Temp & Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Open in the west, W
M. Eye Shape: Elliptical (oval shaped)
M. Orientation of Major Axis in Elliptical Eye: 50° to 230° (NE to SW)
M. Length of Major Axis in Elliptical Eye: 30 nautical miles (35 statute miles)
M. Length of Minor Axis in Elliptical Eye: 20 nautical miles (23 statute miles)

N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Levels (sfc and flt lvl centers are within 5nm of each other): Surface and 850mb
O. Navigational Fix Accuracy: 0.02 nautical miles
O. Meteorological Accuracy: 1 nautical mile

Remarks Section:
Maximum Flight Level Wind: 89kts (~ 102.4mph) which was observed 29 nautical miles (33 statute miles) to the E (88°) from the flight level center at 3:05:30Z
Dropsonde Surface Wind at Center: From 260° at 3kts (From the W at 3mph)

59



In this thread:

10:30pm CDT Friday NHC Update: 75mph; Nate becomes a hurricane - Chris in Tampa, 10/6/2017, 11:37 pm

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