San Juan County Severe Watches & Warnings NOAA Weather Radio

Record Report
Statement as of 1:34 am PDT on August 31, 2015

... Daily rainfall record broken at Seattle-Tacoma International
Airport...

Seattle-Tacoma International Airport received 0.40 inch of rain on
Sunday... August 30th. This broke the old record of 0.37 inch set
back in 1975.