Flood Potential Outlook
Issued by NWS Pendleton, OR

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FGUS76 KPDT 192121

Hydrologic Outlook
National Weather Service Pendleton OR
121 PM PST Sun Feb 19 2017

...Threat of localized flooding due to rain and snowmelt can
be expected Monday and Tuesday...

Localized minor flooding will possible across Benton...Franklin...
Walla Walla...and Columbia Counties of Washington, as well as
Morrow and Umatilla Counties of Oregon. Two warm weather systems
will bring rain to the region Monday and Tuesday. The first system
will arrive Monday morning. There may be a brief break Monday
evening before the next system arrives early Tuesday.

Snow levels in the Blue Mountains will rise above 5000 feet Monday
afternoon, then decrease to 3500-4000 feet Tuesday. The Lower
Columbia Basin and Foothills of the Blue Mountains will see
several periods of rain and may see local ponding of water on
roads and rapid rises in small streams Monday through Tuesday

Runoff from rain and snowmelt may cause flooding of some small
streams, fields, and poor drainage areas. City streets may be
impacted, especially where storm drains are clogged. Low-lying
county roads may be affected, and homes with poor drainage around
the foundation may be at risk for basement flooding.

Mainstem river flooding is not expected at this time. Cooler air
is will spread back into the area by late Tuesday, with the flood
threat decreasing.


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