Historic September rainfall totals continued to add up across Oregon and SW Washington on Monday. In some cases more than 15" of rain has fallen in just the past 72 hours alone near Mt. St. Helens in SW Washington.
Rainfall totals like this are simply staggering for the month of September in the Pacific Northwest, especially considering these are just under 72 hour totals. Records dating back more than 140 years have already fallen in Portland as downtown nears the 7 inch mark for the month.
For comparison, the normal rainfall for Portland in September is about 1.50". Astoria, Oregon is closing in on nearly one foot of rain for the month of September of which more than 7" fell in just the past 72 hours alone. More than seven major cities across Oregon and SW Washington have already set new all-time rainfall records for September including, Portland, Salem, Eugene, Astoria, Hillsboro in Oregon and Vancouver in Washington state."
The following are area weekend rainfall totals from 10 a.m. Friday through 8 a.m. Monday morning (just under 72 hours).
Upper Hood River Valley. -- Middle Mtn., 4.26 inches
Western Columbia River Gorge. -- North Bonneville, 6.14 inches; Bonneville Dam, 5.0; Locks, 4.79; Hood River, 2.21.
South Washington Cascades -- Swift Creek (Mt St Helens), 15.30; Buck Creek, 5.39.
Northern Oegon Cascade Foothills. -- Eagle Creek, 2.95.