A timeline of Tropical Storm Harvey's development

CORPUS CHRISTI, Texas — Harvey made landfall in Texas on Friday night as the strongest hurricane to hit the U.S. in more than a decade. By Saturday afternoon it had been downgraded into a tropical storm, but it had dumped 18 inches of rain on some areas and forecasters were warning that it could cause catastrophic flooding in the coming days.Here is a timeline of key moments in the storm's development:— Aug. 17, 4 p.m., Tropical Storm Harvey is named, six hours after the National Hur