Tillamook County Emergency Management ADVISORY: Flood Watch from late tonight Feb. 22 until 04:00AM Wednesday Feb. 26

* WHAT…Flooding caused by excessive rainfall is possible.

* WHERE…Portions of northwest Oregon and southwest Washington, including the following counties, in Oregon, Benton, Clackamas, Clatsop, Columbia, Cowlitz, Hood River, Lane, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, and Yamhill. In Washington, Clark, Pacific, and Skamania.

* WHEN…From late tonight through late Tuesday night.

* IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations, especially for rivers draining the Willapa Hills and Oregon Coast Range. Flooding may occur in poor drainage and urban areas. Landslides are possible through this period, especially over the Cascades due to heavy rainfall above 7,000 feet combined with snowmelt. There is low probability for debris flows as rainfall rates are not expected to meet thresholds over recently burned areas.

* ADDITIONAL DETAILS… – An atmospheric river and series of frontal systems will produce periods of heavy rainfall over northwest Oregon and Southwest Washington through Monday. The heaviest rain will be over the coast, Coast Range, Willapa Hills, and Cascades where rain totals from Saturday through Monday night will range from 3 to 6 inches, with locally higher amounts possible. Snow levels will rise to above 7,000 feet on Sunday, and snow melt due to rain falling on the Cascade snow pack could cause additional flooding concerns for drainages from the Cascades along with enhanced risk of landslides. – http://www.weather.gov/safety/flood

* AFFECTED AREAS: CLATSOP COUNTY COAST … TILLAMOOK COUNTY COAST … CENTRAL COAST OF OREGON … NORTH OREGON COAST RANGE LOWLANDS … CENTRAL OREGON COAST RANGE LOWLANDS … NORTH OREGON COAST RANGE … CENTRAL OREGON COAST RANGE … LOWER COLUMBIA RIVER … TUALATIN VALLEY … WEST HILLS AND CHEHALEM MOUNTAINS … INNER PORTLAND METRO … EAST PORTLAND METRO … OUTER SOUTHEAST PORTLAND METRO … WEST CENTRAL WILLAMETTE VALLEY … EAST CENTRAL WILLAMETTE VALLEY … BENTON COUNTY LOWLANDS … LINN COUNTY LOWLANDS … LANE COUNTY LOWLANDS … WEST COLUMBIA RIVER GORGE OF OREGON ABOVE 500 FT … WEST COLUMBIA RIVER GORGE I-84 CORRIDOR … UPPER HOOD RIVER VALLEY … CENTRAL COLUMBIA RIVER GORGE I-84 CORRIDOR … CLACKAMAS COUNTY CASCADE FOOTHILLS … CASCADE FOOTHILLS OF MARION AND LINN COUNTIES … LANE COUNTY CASCADE FOOTHILLS … NORTH OREGON CASCADES … CASCADES OF MARION AND LINN COUNTIES … CASCADES OF LANE COUNTY … SOUTH WASHINGTON COAST … WILLAPA AND WAHKIAKUM LOWLANDS … WILLAPA HILLS … COWLITZ COUNTY LOWLANDS … NORTH CLARK COUNTY LOWLANDS … INNER VANCOUVER METRO … EAST CLARK COUNTY LOWLANDS … SOUTH WASHINGTON CASCADE FOOTHILLS … WEST COLUMBIA RIVER GORGE – SR 14 … CENTRAL COLUMBIA RIVER GORGE – SR 14 … SOUTH WASHINGTON CASCADES

Instructions:

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.