Get ready for the cold. Some the coldest nights this fall is expected to hit Puget Sound overnight Wednesday intoThursday morning.

If you thought last night and this morning was chilly, you've seen nothing yet, said KING 5 Chief Meteorologist Jeff Renner.

Renner expects mostly clear skies Wednesday night with overnight lows dropping to the upper 20s to low 30s near Puget Sound shorelines (generally within 3 to 5 miles) and in the upper teens to mid 20s elsewhere.

Some local fog and freezing fog will be possible overnight, but only in wind sheltered areas, said Renner.

Get Jeff Renner's full forecast

Winds of 5 to 15 mph will drop the wind chill temperatures another 10 to 15 degrees below what you see on the thermometer. The combination of wet ground and clearing skies could lead to patchy fog or freezing fog overnight, adds Renner, but the winds will work against fog formation.

The Puget Sound region will be mostly sunny after areas of morning fog Thursday. High temperatures will be in the low to mid 40s, except for Whatcom County, which will see highs in the 30s.

In the mountains, skies will be mostly sunny with freezing levels at 2,000 feet. High temperatures wwill hit the mid to upper 20s.

While we have only very preliminary hints, so far the travel period of Wednesday and Thursday looks dry in Washington, said Renner.

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