* WHAT...Urban and small stream flooding caused by excessive rainfall is expected.

* WHERE...Most areas across southwest Washington and northwest Oregon.

* WHEN...Until 415 PM PST Wednesday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas. Ponding of water in urban or other areas is expected overnight into Wednesday.

* ADDITIONAL DETAILS... - At 410 PM PST, Rain will increase this evening, with rain becoming heavy at times overnight. This will cause areas of urban and small stream flooding. Overflowing poor drainage areas will cause minor flooding in the advisory area. In addition, leaf-clogged storm drains will create poor drainage, resulting in flooded roadways and intersections.

- Additional rainfall amounts of 1 to 4 inches are expected tonight into Wednesday, with the 2 to 5 inches along the coast into the Coast Range and Willapa Hills. Heaviest rain will end by 8 am Wednesday, but poor drainage issues may continue through the day.

- Some locations that will experience flooding include... Eugene, Salem, Hillsboro, Corvallis, Albany, McMinnville, Oregon City, Battle Ground, Dallas, Washougal, St. Helens, Kelso, Newport, Sandy, Astoria, Sweet Home, Florence, Lincoln City, Seaside and Sheridan. - http://www.weather.gov/safety/flood

* WHAT...South winds 15 to 25 mph with gusts up to 45 mph expected.

* WHERE...Central and Southern Willamette Valley, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Portland West Hills and Chehalem Mountain, Inner Portland Metro, North Clark County Lowlands, and Inner Vancouver Metro.

* WHEN...From 8 PM this evening to 6 AM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* ADDITIONAL DETAILS...Areas in the central Willamette Valley will see the highest wind speeds.