danielw
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| (Moderator) |
| Tue Aug 02 2011 02:22 PM |
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Re: Tropical Storm Emily Forms in Far Eastern Caribbean
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Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 2nd day of the month at 18:13Z
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 309)
Storm Number & Year: 05L in 2011
Storm Name: Emily (flight in the North Atlantic basin)
Mission Number: 6
Observation Number: 02
A. Time of Center Fix: 2nd day of the month at 17:48:50Z
B. Center Fix Coordinates: 15°38'N 64°47'W (15.6333N 64.7833W)
B. Center Fix Location: 210 miles (338 km) to the SSE (156°) from San Juan, Puerto Rico (USA).
C. Minimum Height at Standard Level: Not Available
D. Estimated (by SFMR or visually) Maximum Surface Wind: 49kts (~ 56.4mph)
E. Location of the Estimated Maximum Surface Wind: 42 nautical miles (48 statute miles) to the NE (52°) of center fix
F. Maximum Flight Level Wind Inbound: From 113° at 51kts (From the ESE at ~ 58.7mph)
G. Location of Maximum Flight Level Wind Inbound: 41 nautical miles (47 statute miles) to the NE (52°) of center fix
H. Minimum Sea Level Pressure: 1006mb (29.71 inHg) - Extrapolated
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 24°C (75°F) at a pressure alt. of 305m (1,001ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 23°C (73°F) at a pressure alt. of 307m (1,007ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 18°C (64°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: 51kts (~ 58.7mph) in the northeast quadrant at 17:35:10Z
Sea Level Pressure Extrapolation From: Below 1,500 feet
Notes:
The Inside Eye/ Center Temp and the Outside Eye/Center Temps are opposite what they should be. Inside Eye/ Center Temp should be equal to or Higher than the outside Eye/ Center Temp. This gives some indication that the system isn't fully functioning as a vacuum.
The dry air entrainment on the SW side could be causing this.
Centers are within 5 miles of each other now.
Observation is from 1000 feet above sea level so the Maximum Flight Level Wind: 51kts (~ 58.7mph) should equate to a surface wind speed of 53 to 54 mph. Using a 90% reduction factor. After checking. The 54 mph is what the SFMR surface wind speed estimate is at the 58.7 mph spot wind location.