Reported in the Seattle Times:
Continuous rainfall in Western Washington has caused landslides, train and traffic delays, and flood warnings and emergencies throughout the region Tuesday.
Rainfall at the National Weather Service’s office in Seattle set a record on Monday, at 1.51 inches, “and we’ve had at least three-quarters of an inch of rain since midnight,” said Dana Felton, a meteorologist with the weather service in Seattle, shortly before 7 a.m. Tuesday.
Just before daybreak Tuesday, rain was falling at a rate of up to a half an inch per hour across the lowlands and the mountains, where snow elevations remain as high as 10,000 feet.
It continued throughout the day, reaching 1.61 inches by 5 p.m. Tuesday.
If I read the stream flow data right (from the USGS website for river measuring stations below), some 13 times the long-term median volume of water in the Snoqualmie River is tumbling down over the falls right now.
[Erika Schultz / The Seattle Times]
Long-term median flow, cubic ft/s: 445
Discharge, cubic ft/s: 5,740
Gage height, ft: 8.52
[Source: USGS web site waterdata.usgs.gov]