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Aon Impact Forecasting Update on Hurricane Dolly
Chicago
NYSE: AOC

CHICAGO, July 23, 2008 - Impact Forecasting, LLC, a unit of Aon Corporation (NYSE: AOC), released the following update July 23 at 4 p.m. CDT regarding Hurricane Dolly. For more information, or to subscribe to Impact Forecasting's weekly "Cat Alerts" and get breaking news about global meteorological events, visit http://aon.mediaroom.com/index.php?s=63&item=251.

The center of Dolly made landfall over southern Padre Island earlier this afternoon as a borderline Category One to Category Two hurricane on the Saffir-Simpson Scale. At the time of landfall, the central pressure reported by the Air Force Reconnaissance aircraft was 967 mb (28.56 inches of mercury) and winds were estimated between 90 and 100 mph (150 and 160 kph). Currently, the center of the storm is partially inland over far southern Texas. Due to land interaction, a gradual weakening has begun and will continue. The current advisory lists Dolly as an 85 mph (140 kph) Category One hurricane. According to the National Hurricane Center’s forecast, as Dolly continues to move farther inland, it will begin to rapidly lose its tropical characteristics.

Dolly continues to move on a steady northwest track at about 8 mph (13 kph). The hurricane is now located south of a ridge of high pressure over the western United States.  Over the next 24-48 hours, a gradual turn to the west-northwest and west is expected until Dolly fully dissipates in about 48 hours.

Dolly is a large slow moving system and will continue to produce very heavy rains over the next few days. The system is expected to produce total rainfall accumulations of eight to 12 inches, with isolated amounts of 20 inches possible in some locations over south Texas and northeastern Mexico. These rains will likely cause widespread flooding across portions of south Texas and northeast Mexico.

Media Contact: Rahsaan Johnson, 312.381.2684, Rahsaan_Johnson@aon.com
 

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