Hazard Report Provided By forecast.weather.gov

Hydrologic Outlook
ORZ049-050-502-503-505>507-509-WAZ029-030-521>523-240115-

Hydrologic Outlook
National Weather Service Pendleton OR
540 PM PST Sat Feb 22 2025

...MODERATE RAIN AND SNOWMELT DUE TO WARMING TEMPERATURES WILL LEAD
TO RISES ON STREAMS AND RIVERS THROUGH MONDAY AFTERNOON...

Synopsis: Rain and high mountain snow this weekend and early next
week will lead to rising water levels on area streams and rivers.
Total rainfall amounts of 2 to 5 inches are expected in the Cascades
and 1 to 3 inches in the eastern Oregon mountains. In addition,
temperatures rising to the 40s and lower 50s in the mountains will
lead to snow melt adding even more water to area rivers and streams.

What: Precipitation and snow melt due to warmer temperatures this
weekend into early next week will lead to rises on area creeks,
streams and rivers. Rivers are low enough so that most rivers will
remain below bankfull. However, the Walla Walla River at Touchet,
the Klickitat River at Pitt, and the Naches River at Cliffdell are
expected to approach bankfull late Sunday night before receding
Monday and Tuesday. Another concern will be rapid rises on smaller
streams and creeks due to heavier downpours and snowmelt. This could
lead to debris flows on recent burn scars and over steep terrain.

When: Rain will continue through Monday with the heaviest rain
expected tonight and Sunday.

Where: The East Slopes of the Washington and Oregon Cascades, the
Simcoe Highlands, the Northern and Southern Blue Mountains, the Blue
Mountain Foothills of Washington and Oregon, Wallowa County and the
Grande Ronde Valley.

This Hydrologic Outlook will be updated as needed due to changing
conditions.

$$

MW

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