Flood Potential Outlook
Issued by NWS Pendleton, OR

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Hydrologic Outlook
National Weather Service Pendleton OR
949 AM PST Thu Dec 28 2017

...High water levels on streams flowing out of the Blue
Mountains tonight through Sunday...

Heavy rain and melting snow tonight through Friday will allow
increased runoff into the streams and rivers flowing off of the
Blue Mountains.

Snow levels are expected to rise to around 6000 feet tonight and
remain around 6500 feet through Friday with precipitation amounts
of 1.5 to 2 inches in the mountains.

Rapid rises can be expected starting late tonight and continue
through Friday with most streams and rivers cresting Saturday and
early Sunday.

At this time, rivers flowing out of the northern Blue Mountains
are expected to see the highest rises. The Walla Walla River near
Touchet is forecast to crest right at the flood stage of 13 feet
early Sunday morning. The Grande Ronde and Umatilla rivers will
see rises but are not expected to reach flood levels.

Persons living or traveling along rivers and streams should be
prepared for higher water levels and continue to monitor water
levels and forecasts.

Monitor current water levels and river forecasts on the web at:
http://water.weather.gov/ahps2/index.php?wfo=pdt

$$



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