The National Weather Service in Seattle is forecasting a spate of wet weather for the Seattle area, with a high possibility of river flooding from Sunday through Tuesday due to a looming atmospheric river. A hydrologic outlook warns of moderate to heavy rainfall throughout Western Washington, putting several rivers at risk of cresting above the action stage, according to the National Weather Service.
Starting today, Seattle residents can expect a pleasant high of 69 degrees with clear skies, but the weather is set to shift with a 30 percent chance of rain overnight, and the likelihood of precipitation increasing as the weekend progresses. Monday forecasts suggest not only showers but the potential for thunderstorms in the afternoon, with the cascade of events bringing up to four inches of rain in mountainous regions and causing rivers like the Skagit and Snohomish to swell—and they might spill over into the planes that usually remain dry this time of year.
The NWS advises that total rainfall amounts could range from an inch to two inches in the lowlands, substantially raising water levels in area rivers. Of particular concern, the Snoqualmie River is on the brink of reaching a minor flood stage, signaling potentially significant impacts for nearby communities. The hydrologic report also notes snow levels will be above 5000 feet, meaning most of the precipitation will fall as rain, adding to the deluge.
As the atmospheric river takes course, those near the Skagit, Snohomish, Skykomish, White, and Skokomish Rivers are urged to keep alert, for these water bodies may surge into action by Sunday and into the subsequent days, with the last of the rivers set to crest between Sunday and Tuesday. Local officials will be monitoring the situation closely; they will issue further advisories and residents should stay tuned for the next update, which is expected Friday afternoon.
