Hydrologic Outlook

Hydrologic Outlook
ORZ049-050-502-503-507-509-WAZ029-030-522-523-021900-

Hydrologic Outlook
National Weather Service Pendleton OR
311 PM PDT Sat Jun 1 2024

...AN ATMOSPHERIC RIVER WILL BRING MODERATE RAINFALL LEADING TO
RISES ON STREAMS AND RIVERS SUNDAY AND MONDAY...

Synopsis: An atmospheric river will bring abundant moisture to the
region with an incoming system Sunday through Monday. Rainfall
amounts of 1 to 2 inches are expected along the Oregon and
Washington Cascade crest and in the higher mountains of northeast
Oregon and southeast Washington. These amounts may be increased
locally by 1 to 2 inches of snow melt from what remains of the high
mountain snowpack.

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

When: Rain will arrive along the Cascades early Sunday morning and
in the eastern mountains late Sunday morning and afternoon. Rain
will taper off Monday afternoon and evening.

What: The precipitation and possible snow melt will lead to rises on
area creeks, streams and rivers. Rivers are low enough that only the
Naches River at Cliffdell and the Naches River at Naches are
expected to reach bankfull Monday and only by a few inches at those
locations. However, with the heavier periods of rain rapid rises
will be possible on smaller streams and creeks, especially in
Wallowa County and this is the main concern for the next couple of
days.

An update will be provided Sunday morning.

$$

GP