Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 1st day of the month at 1:32Z
Agency: United States Air Force
Aircraft: Lockheed WC-130J Hercules with reg. number AF97-5305
Storm Number & Year: 09 in 2020
Storm Name: Isaias (flight in the North Atlantic basin)
Mission Number: 9
Observation Number: 18

A. Time of Center Fix: 1st day of the month at 0:59:20Z
B. Center Fix Coordinates: 22.98N 76.07W
B. Center Fix Location: 161 statute miles (259 km) to the NE (47°) from Camagüey, Cuba.
C. Minimum Height at Standard Level: 1,321m (4,334ft) at 850mb
D. Minimum Sea Level Pressure: 987mb (29.15 inHg)
E. Dropsonde Surface Wind at Center: From 350° at 6kts (From the N at 7mph)
F. Eye Character: Open in the south
G. Eye Shape & Diameter: Circular with a diameter of 22 nautical miles (25 statute miles)
H. Estimated (by SFMR or visually) Maximum Surface Wind Inbound: 62kts (71.3mph)
I. Location & Time of the Estimated Maximum Surface Wind Inbound: 6 nautical miles to the ENE (66°) of center fix at 0:57:30Z
J. Maximum Flight Level Wind Inbound: From 162° at 81kts (From the SSE at 93.2mph)
K. Location & Time of the Maximum Flight Level Wind Inbound: 7 nautical miles to the ENE (68°) of center fix at 0:57:00Z
L. Estimated (by SFMR or visually) Maximum Surface Wind Outbound: 53kts (61.0mph)
M. Location & Time of the Estimated Maximum Surface Wind Outbound: 6 nautical miles to the SW (232°) of center fix at 1:01:30Z
N. Maximum Flight Level Wind Outbound: From 315° at 51kts (From the NW at 58.7mph)
O. Location & Time of the Maximum Flight Level Wind Outbound: 6 nautical miles to the SW (232°) of center fix at 1:01:30Z
P. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 20°C (68°F) at a pressure alt. of 1,517m (4,977ft)
Q. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 25°C (77°F) at a pressure alt. of 1,510m (4,954ft)
R. Dewpoint Temp (collected at same location as temp inside eye): 22°C (72°F)
R. Sea Surface Temp (collected at same location as temp inside eye): Not Available
S. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
S. Fix Levels (surface & flight level centers within 5nm of each other): Surface and 850mb
T. Navigational Fix Accuracy: 0.02 nautical miles
T. Meteorological Accuracy: 0.75 nautical miles

Still slowly strengthening but the open eyewall points to the system still dealing with some dry air. Also, upper air recon shows some very dry air just SW of the system meaning it might be very hard for the system to maintain such a small core and continue to strengthen.