10/30 Vortex: 16:56Z. Dropsonde: 16:44Z
Posted by JAC on 10/30/2010, 8:36 pm
Eyewall Delta T = 4C
Theta-E = 366K
992mb



Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 30th day of the month at 16:56Z
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 300)
Storm Number & Year: 21L in 2010
Storm Name: Tomas (flight in the North Atlantic basin)
Mission Number: 2
Observation Number: 26
A. Time of Center Fix: 30th day of the month at 16:29:50Z
B. Center Fix Coordinates: 13°09'N 60°46'W (13.15N 60.7667W)
B. Center Fix Location: 34 miles (54 km) to the E (96°) from Kingstown, Saint Vincent and the Grenadines.
C. Minimum Height at Standard Level: 3,025m (9,925ft) at 700mb
D. Estimated (by SFMR or visually) Maximum Surface Wind: 54kts (~ 62.1mph)
E. Location of the Estimated Maximum Surface Wind: 33 nautical miles (38 statute miles) to the WNW (299°) of center fix
F. Maximum Flight Level Wind Inbound: From 360° at 58kts (From the N at ~ 66.7mph)
G. Location of Maximum Flight Level Wind Inbound: 42 nautical miles (48 statute miles) to the WNW (295°) of center fix
H. Minimum Sea Level Pressure: 992mb (29.29 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 9°C (48°F) at a pressure alt. of 3,051m (10,010ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 13°C (55°F) at a pressure alt. of 3,043m (9,984ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 2°C (36°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character (Undecoded): RAGGED BANDING
M. Eye Shape & Diameter: Circular with a diameter of 40 nautical miles (46 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: 67kts (~ 77.1mph) in the north quadrant at 14:16:50Z
Remarks Section - Additional Remarks...
RADAR STRONG BAND SOUTH SEMI-CIRCLE RAGGED APPEARANCE OVERALL
LAST REPORT







Product: Air Force Temp Drop (Dropsonde) Message (UZNT13 KNHC)
Transmitted: 30th day of the month at 16:44Z
Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 300)
Storm Number: 21
Storm Name: Tomas (flight in the North Atlantic basin)
Mission Number: 2
Observation Number: 25

Part A...

Date: Near the closest hour of 17Z on the 30th day of the month
Highest Mandatory Level For Which Wind Was Reported: 700mb
Coordinates: 13.1N 60.8W
Location: 32 miles (52 km) to the ESE (103°) from Kingstown, Saint Vincent and the Grenadines.
Marsden Square: 043

Sea Level
- Pressure: 992mb (29.29 inHg)
- Air Temperature: 27.4°C (81.3°F)
- Dew Point: 26.1°C (79.0°F)
- Wind Direction: 100° (from the E)
- Wind Speed: 14 knots (16 mph)

1000mb Level
- Height of pressure level: -73 geopotential meters (-240 geo. feet)

925mb Level
- Height of pressure level: 618 geopotential meters (2,028 geo. feet)
- Air Temperature: 24.6°C (76.3°F)
- Dew Point: 22.7°C (72.9°F)
- Wind Direction: 110° (from the ESE)
- Wind Speed: 5 knots (6 mph)

850mb Level
- Height of pressure level: 1,360 geopotential meters (4,462 geo. feet)
- Air Temperature: 22.4°C (72.3°F)
- Dew Point: Approximately 17°C (63°F)
- Wind Direction: 105° (from the ESE)
- Wind Speed: 5 knots (6 mph)

700mb Level
- Height of pressure level: 3,027 geopotential meters (9,931 geo. feet)
- Air Temperature: 13.4°C (56.1°F)
- Dew Point: Approximately 3°C (37°F)
- Wind Direction: 295° (from the WNW)
- Wind Speed: 5 knots (6 mph)

Information About Radiosonde:
- Launch Time: 16:30Z
- About Sonde: A descending radiosonde tracked automatically by satellite navigation with no solar or infrared correction.

Remarks Section...

Dropsonde Location: Dropped in eye.

Splash Location: 13.13N 60.76W
Splash Time: 16:33Z

Release Location: 13.12N 60.76W
Release Time: 16:30:06Z

Splash Location: 13.13N 60.76W
Splash Time: 16:33:08Z

Mean Boundary Level Wind (mean wind in the lowest 500 geopotential meters of the sounding):
- Wind Direction: 105° (from the ESE)
- Wind Speed: 7 knots (8 mph)

Deep Layer Mean Wind (average wind over the depth of the sounding):
- Wind Direction: 115° (from the ESE)
- Wind Speed: 4 knots (5 mph)
- Depth of Sounding: From 697mb to 991mb

Average Wind Over Lowest Available 150 geopotential meters (gpm) of the sounding:
- Lowest 150m: 156 gpm - 6 gpm (512 geo. feet - 20 geo. feet)
- Wind Direction: 105° (from the ESE)
- Wind Speed: 9 knots (10 mph)

Sounding Software Version: AEV 20801

Part B: Data For Significant Levels...

Significant Temperature And Relative Humidity Levels...

992mb Level (Surface)
- Air Temperature: 27.4°C (81.3°F)
- Dew Point: 26.1°C (79.0°F)

895mb Level
- Air Temperature: 23.4°C (74.1°F)
- Dew Point: 21.7°C (71.1°F)

850mb Level
- Air Temperature: 22.4°C (72.3°F)
- Dew Point: Approximately 17°C (63°F)

728mb Level
- Air Temperature: 14.8°C (58.6°F)
- Dew Point: 13.6°C (56.5°F)

697mb Level
- Air Temperature: 13.0°C (55.4°F)
- Dew Point: Approximately 2°C (36°F)

Significant Wind Levels...

992mb Level (Surface)
- Wind Direction: 100° (from the E)
- Wind Speed: 14 knots (16 mph)

990mb Level
- Wind Direction: 100° (from the E)
- Wind Speed: 16 knots (18 mph)

981mb Level
- Wind Direction: 105° (from the ESE)
- Wind Speed: 7 knots (8 mph)

953mb Level
- Wind Direction: 90° (from the E)
- Wind Speed: 8 knots (9 mph)

944mb Level
- Wind Direction: 105° (from the ESE)
- Wind Speed: 4 knots (5 mph)

933mb Level
- Wind Direction: 130° (from the SE)
- Wind Speed: 8 knots (9 mph)

917mb Level
- Wind Direction: 100° (from the E)
- Wind Speed: 4 knots (5 mph)

876mb Level
- Wind Direction: 125° (from the SE)
- Wind Speed: 5 knots (6 mph)

864mb Level
- Wind Direction: 150° (from the SSE)
- Wind Speed: 9 knots (10 mph)

850mb Level
- Wind Direction: 105° (from the ESE)
- Wind Speed: 5 knots (6 mph)

697mb Level
- Wind Direction: 295° (from the WNW)
- Wind Speed: 6 knots (7 mph)

79
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Strong Eyewall Taking Shape - JAC, 10/30/2010, 7:16 pm
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