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Anyone returning Sunday from Thanksgiving festivities on the other side of the Cascades should be prepared for a wet trip home, officials say.

Four inches of rain are expected to drench the area around Snoqualmie and Stevens passes, reducing visibility and maybe leaving water on roadways.

Flood watches have been issued for King, Snohomish, Pierce, Thurston, Lewis and Mason counties.

“It’s not going to be as bad as a snowstorm, for sure. But it’s going to be really bad,” said National Weather Service meteorologist Josh Smith, warning drivers to go slowly.

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Seattle will get some showers, too, but only about an inch of rain. Surrounding areas may get 2 inches, Smith said.

The rain is only the start of several days of interesting weather.

By the time the Seahawks and New Orleans Saints kick off in their “Monday Night Football” game at CenturyLink Field, the region will have shifted from fall to winter.

A frigid front from Canada is expected to arrive Monday afternoon, just in time for the big game.

Temperatures will drop into the 30s, and Seattle is likely to get at least a few snow flurries, Smith said, although it is unclear exactly when they might arrive.

“It’s definitely quite possible” snow will fall during the showdown, Smith said, which starts at 5:40 p.m.

Parts of Seattle could get up to 2 inches, Smith said.

The precipitation should leave the Puget Sound area after Monday, but cold air is expected to linger.

The forecast calls for temperatures in the 30s on Tuesday and Wednesday, dropping into the 20s at night.

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