237
FGUS76 KPDT 202359
ESFPDT
ORZ049-050-502-503-505>507-509-WAZ029-030-521>523-220000-

Hydrologic Outlook
National Weather Service Pendleton OR
359 PM PST Thu Feb 20 2025

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

What: The precipitation and snow melt will lead to rises on area
creeks, streams and rivers. Rivers are low enough that only the
Naches River at Cliffdell is expected to exceed bankfull early
Monday for a few hours and only by a few inches. However, with the
heavier periods of rain and snow melt, rapid rises will be possible
on smaller streams and creeks as well. Further rises on streams and
creeks will be a concern through the weekend into early next week.

When: Rain will be ending tonight though more systems will bring
rain Friday night through Monday.

Where: The Upper and Lower 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.

Synopsis: Rain and high mountain snow in the last 24 hours and
multiple systems this weekend and early next week will lead to
rising water levels on area streams and rivers. Rainfall amounts of
2 to 4 inches are expected in the Cascades and 1 to 2 inches in the
eastern Oregon mountains. In addition, temperatures will be rising
to the 40s and even lower 50s in the mountains which will lead to
snow melt adding even more water to rivers and streams. At this
point, the Naches River at Cliffdell is expected to barely reach
action stage for several hours early Monday before receding. Other
rivers in the Cascades and eastern Oregon mountains are forecast to
approach but stay below action stage. Rises will also be possible on
smaller streams and creeks.

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

$$

MC