Heavy rain will fall on a deep primed snowpack leading to the melt
increasing. Flows in rivers may increase quickly and reach critical
levels.
* WHAT…Flooding caused by rain and snowmelt is possible. Flooding
caused by ice jams on rivers with ice buildup is also possible.
* WHERE…Portions of Idaho, including the following counties,
Benewah, Bonner, Boundary, Kootenai, Latah, Lewis, Nez Perce and
Shoshone and Washington, including the following counties, Asotin,
Garfield, Spokane and Whitman.
* WHEN…From 10 PM PST this evening through late Monday night.
* IMPACTS…Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas, including
basements and crawlspaces.
* ADDITIONAL DETAILS…
– An atmospheric river will produce periods of moderate
rainfall Saturday night into Monday. Rain, breezy winds, high
temperatures in the upper 40s to low 50s, and overnight
temperatures above freezing will contribute to rapid lowland
snowmelt.
– http://www.weather.gov/safety/flood