Seattle has been collecting rainfall data through a network of rain gauges since the late 1970s. A storm that was previously expected only once in 100 years is now likely in 25 years.
One of the worst events on record occurred in early December of 2007 when two storms flooded the Washington and Oregon coasts and brought wind gusts that topped 100 miles per hour (160.9 km/h). Seattle registered 5.61 inches (14.2 cm) of rain in only 24 hours.
