A very wet weekend in store across Oregon. Rain showers pick up tonight across the Valley with snow showers building over the Passes. A Winter Weather Advisory in effect until 4am for Willamette & Sanitam Passes for 3-8" of new snow this evening/overnight.
Showers will mainly be light to moderate with 1/2" new rainfall across the region locally on Saturday as a cold front slowly moves across Oregon.
The bulk of the activity really picks up Saturday night (mountain snow, Valley & Coastal rain).
BIGGEST TRAVEL CONCERNS: Saturday night, Sunday night will be most difficult for travel over the Passes and Cascade Foothills. Monday morning will be a concern for Eugene, Roseburg & Coos Bay as rain will be heavy at times leading to a very wet commute with potentially lowered visibility, coastal flooding & gusty wind. Portland will also be dealing with the potential for a rain/snow mix Monday morning.
HOW MUCH MOUNTAIN SNOW? A Winter Storm Watch goes in effect Saturday afternoon until Monday morning for Lane County Cascades and Douglas County Foothills. We could see anywhere from 1-3 FEET of total snow accumulation from Saturday evening through early Monday over the Passes and above 2500' in Douglas County (including Diamond Lake). Travel is discouraged and will be dangerous Saturday evening/overnight & Sunday evening/overnight. If you absolutely must travel, carry chains & emergency supplies.
FLOODING POTENTIAL: The heaviest rain moves in Saturday night into Sunday and Sunday evening throughout the day Monday. An Areal Flood Watch goes in effect for Coos & Douglas Counties late Saturday night until late Monday night for 2-4" total of new rainfall. Rapid rises for all creeks & rivers in both counties are likely. NWS Medford is keeping a particularly close eye on Deer Creek in Roseburg.
Willamette Valley & Umpqua Basin Rainfall:
Coos Bay Rainfall:
In addition to flooding, debris flow over recent burn scars in SW Oregon are possible.
WIND: A High Wind Watch goes in effect Sunday evening until Monday afternoon for Coos County. Southerly sustained wind at 35-50mph possible along the beaches with 70-80mph gusts. Isolated damage to smaller limbs/trees and powerlines is possible.
LOW-LEVEL SNOW?: There is a low chance of rain/snow mix Sunday night into Monday morning north of Salem, but this all depends on the positive of a stalled cold front and low pressure storm system off the Oregon Coast. Surface temps look to be too warm in Eugene and across the rest of the Willamette Valley for any snowflakes here.
Last updated 4pm pst Friday by Chief Meteorologist Carmen Rose
Today's Record Temperatures