Max sustained winds increased from 145MPH to 160MPH in 3 hours!

Extract from Public advisory #27 (3am GMT 9/9/04)
IVAN IS AN EXTREMELY DANGEROUS CATEGORY 4 HURRICANE ON THE
SAFFIR-SIMPSON HURRICANE SCALE. MAXIMUM SUSTAINED WINDS ARE NEAR
145 MPH...230 KM/HR...WITH HIGHER GUSTS. SOME ADDITIONAL
STRENGTHENING IS POSSIBLE TONIGHT...FOLLOWED BY FLUCTUATIONS IN
STRENGTH.

Extract from Public advisory #27A (6am GMT 9/9/04)
RECENT REPORTS FROM AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT
INDICATE THAT MAXIMUM SUSTAINED WINDS ARE NOW NEAR 160 MPH...255
KM/HR...WITH HIGHER GUSTS.