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6:22pm EDT Tuesday: 910mb; 14 knots of surface wind; 175mph SFMR in northern quadrant

Posted by Chris in Tampa on 9/19/2017, 6:46 pm

Two non suspect 10 second estimated surface winds by SFMR in a row:

151 knots (173.8 mph)
152 knots (174.9 mph)

The NHC will need to raise the winds based on that.



URNT12 KNHC 192236
VORTEX DATA MESSAGE   AL152017
A. 19/22:19:00Z
B. 16 deg 53 min N
 064 deg 06 min W
C. 700 mb 2320 m
D. 132 kt
E. 133 deg 8 nm
F. 228 deg 136 kt
G. 131 deg 6 nm
H. 910 mb
I. 12 C / 3052 m
J. 21 C / 3047 m
K. 12 C / NA
L. CLOSED
M. C9
N. 12345 / 7
O. 0.02 / 1 nm
P. AF303 0515A MARIA              OB 23
MAX OUTBOUND AND MAX FL WIND 157 KT 352 / 5 NM 22:21:30Z
CNTR DROPSONDE SFC WIND 120 / 14 KT



Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 19th day of the month at 22:36Z
Agency: United States Air Force
Aircraft: Lockheed WC-130J Hercules with reg. number AF97-5303
Storm Number & Year: 15 in 2017
Storm Name: Maria (flight in the North Atlantic basin)
Mission Number: 5
Observation Number: 23
A. Time of Center Fix: 19th day of the month at 22:19:00Z
B. Center Fix Coordinates: 16°53'N 64°06'W (16.8833N 64.1W)
B. Center Fix Location: 167 statute miles (269 km) to the SE (129°) from San Juan, Puerto Rico (U.S.).
C. Minimum Height at Standard Level: 2,320m (7,612ft) at 700mb
D. Estimated (by SFMR or visually) Maximum Surface Wind Inbound: 132kts (~ 151.9mph)
E. Location of the Estimated Maximum Surface Wind Inbound: 8 nautical miles (9 statute miles) to the SE (133°) of center fix
F. Maximum Flight Level Wind Inbound: From 228° at 136kts (From the SW at ~ 156.5mph)
G. Location of Maximum Flight Level Wind Inbound: 6 nautical miles (7 statute miles) to the SE (131°) of center fix
H. Minimum Sea Level Pressure: 910mb (26.88 inHg)
I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 12°C (54°F) at a pressure alt. of 3,052m (10,013ft)
J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 21°C (70°F) at a pressure alt. of 3,047m (9,997ft)
K. Dewpoint Temp (collected at same location as temp inside eye): 12°C (54°F)
K. Sea Surface Temp (collected at same location as temp inside eye): Not Available
L. Eye Character: Closed
M. Eye Shape & Diameter: Circular with a diameter of 9 nautical miles
N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
N. Fix Level: 700mb
O. Navigational Fix Accuracy: 0.02 nautical miles
O. Meteorological Accuracy: 1 nautical mile

Remarks Section:
Maximum Outbound and Flight Level Wind: 157kts (~ 180.7mph) which was observed 5 nautical miles to the N (352°) from the flight level center at 22:21:30Z
Dropsonde Surface Wind at Center: From 120° at 14kts (From the ESE at 16mph)

139



In this thread:

6:22pm EDT Tuesday: 910mb; 14 knots of surface wind; 175mph SFMR in northern quadrant - Chris in Tampa, 9/19/2017, 6:46 pm

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