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Timeline: Another round of lowland snow expected Wednesday night

The next weather system could bring several inches of snow to the Puget Sound region.

Extremely cold temperatures are expected to continue across most of western Washington this week.

After heavy snowfall blanketed the region, arctic air will keep highs below freezing for most of the week, with overnight lows in the teens and mid-20s, according to the National Weather Service (NWS).

The NWS warned that frostbite and hypothermia can occur much faster when temperatures are this cold.

RELATED: Western Washington forecast

Below is a forecast timeline of what to expect Tuesday and this week:

Tuesday

After a slight warmup during the day, temperatures once again drop back into the low 20s and teens overnight throughout western Washington.

Forecasts show little to no snowfall overnight.

Wednesday and Thursday

Wednesday is expected to remain dry but cold.

The NWS said another Fraser outflow is expected to develop, bringing windy conditions to the north interior into Wednesday. A Wind Advisory is in effect for San Juan County and western Whatcom and Skagit counties until 4 p.m. Wednesday.

The next good chance for snow throughout the region is Wednesday night and through early Friday. The NWS said a weather system dropping down from the north could bring another 1-3 inches of lowland snow to the area. There is a 10% chance 3-5 inches of snow could fall, the NWS said.


Highs are forecast to warm into the 30s for the interior and lower 40s for the coast on Thursday, so snow may change to a rain/snow mix from about Seattle southward. The NWS said snow could “turn to all rain for a while at the coast” Thursday, while the mountains could see another 6-12 inches of snow.

Friday and beyond

Snow showers will taper by Friday morning for a mostly dry day. It will remain cold with highs in the upper 20 to mid 30s.

A warm front on Saturday could bring more snow early Saturday, but it should change to light rain by the afternoon as highs warm into the upper 30s and mid 40s. The lowlands are expected to see more rain on Sunday with highs in the 40s.

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