Super Typhoon Bart

Post Landfall 1 | Summary
Posting Date: October 5, 1999, 10:00:00 AM

On September 22, 1999, Super Typhoon Bart was moving in a northerly direction over Japan's Ryukyu Islands. Maximum sustained winds were just over 160 mph, equivalent to a Category 5 on the Saffir-Simpson scale. As the storm approached Japan's southernmost main island of Kyushu, forward speed increased. Increasing vertical wind shear weakened the system, however, and by the time Bart made landfall on Kyushu Island on September 23, maximum sustained winds had dropped to about 125 mph. Interaction with land weakened the storm still further before it moved on into the Sea of Japan. By the time the system crossed western Hokkaido, it had been downgraded to tropical storm status. The actual track of Super Typhoon Bart is quite similar to that of Super Typhoon Mireille, which caused $4.8 billion in insured losses in 1991. Bart's wind speeds were, in fact, slightly higher than Mireille's. However, insured losses resulting from Bart are expected to be lower than those of the 1991 storm, primarily because Bart was a very tightly wound storm with a much smaller radius of maximum winds. The AIR tropical cyclone modeling team has collected the available information about the meteorological parameters and actual track of Bart and has run hundreds of simulations based on this information using the AIR tropical cyclone model for Japan. AIR estimates that insured losses will be between (JPY) 338-547.7 billion. Scenarios are now posted and event sets can be downloaded by both CATMAP/2 and CATRADER clients. Please note that all losses are in Japanese Yen. This will be our final posting on Super Typhoon Bart.

Post Landfall 1 | Downloads
Posting Date: October 5, 1999, 10:00:00 AM