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Slush brings threat of urban flooding to western Washington

A big thaw after record snowfall is raising the threat of urban flooding across Puget Sound.

SEATTLE — Rain has returned to the Puget Sound lowlands as temperatures are on the rise. The big thaw comes after record snowfall over the weekend, with more than a foot in parts of western Washington. 

Snow levels are back up to 2,500 feet. Temperatures will be in the low to mid-40s on Tuesday.

Rainfall estimates range from 0.01 - 0.35 inches Tuesday.

Storm drains may be clogged from snow and ice, which could lead to urban flooding.

RELATED: Western Washington forecast

Snoqualmie Pass is closed in both directions overnight from North Bend to Ellensburg, due to multiple collisions and avalanche danger. I-90 will be closed until at least 8 a.m. Tuesday, according to WSDOT.

Check the WSDOT website for pass updates. 

RELATED: Snoqualmie Pass closed between North Bend and Ellensburg until at least 8 a.m. Tuesday

The National Weather Service (NWS) issued a Winter Weather Advisory for the Cascades of Snohomish, King, Pierce and Lewis counties until 6 p.m. Tuesday. 

RELATED: Snowpocalypse by the numbers: Western Washington’s biggest snow events

Warmer air will continue to move in Tuesday, keeping snow levels up to 2,000 feet. Rain showers with morning fog will be the theme for much of this week before some sunshine returns Wednesday.

Seattle snowstorm by the numbers

Seattle received 8.9 inches of snow Saturday, which set a snowfall record for Feb. 13. The south Sound saw more than a foot in places. 

The National Weather Service said the last time Seattle had more than 8.9 inches of snow in a single day was on January 27, 1969 when 14.9 inches were recorded in Seattle.

More than 300 flights were canceled at Sea-Tac Airport Saturday, in addition to dozens of delays into and out of the airport. Travelers should check with their airlines for delays and cancellations. 

Preliminary 24-hour snowfall reports from areas that received a foot or more of snow on Saturday:

Carbonado: 18 inches

Alder: 16 inches

Olympia: up to 15.5 inches

Melbourne: 15 inches

Graham: 14 inches

Roy: 14 inches

Dupont: 12.5 inches

Vaughn: 12.5 inches

Port Orchard: 12.5 inches

Lacey: 12 inches

Stanwood: 12 inches

Bellevue: up to 12 inches

Ocean Shores: 12 inches

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