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Hydrologic Outlook

National Weather Service Seattle WA

135 PM PST Mon Feb 26 2024



A strong frontal system will move across south-central British 

Columbia Tuesday night through Wednesday night bringing another 

round of moderate to heavy rainfall to western Washington. Storm 

total rainfall amounts of 3 to 5 inches are possible across the 

Olympics and Cascades with 2 to 3 inches possible across the 

lowlands. Snow levels will briefly rise from below 1000 feet on 

Tuesday to just above 4000 feet on Wednesday, which will contribute 

to greater runoff and snowmelt contributions, particularly over the 

Olympics and central Cascades. This will lead to rapid rises in 

river and streams across southwestern Washington, especially through 

the Skokomish, Chehalis, Skookumchuck, and Newaukum River basins. At 

this time, the Skokomish River near Potlatch is the only river 

forecast to enter flood stage, though there is a 35% chance for the 

Newaukum River near Chehalis to enter flood stage Thursday morning.



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Davis