WEATHER: Second Surge Of Cold Air Coming Monday And Tuesday


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The National Weather Service released another “Special Weather Statement” (not as strong as an Advisory) on Saturday, warning us all that, in addition to the possibility of cold and snow this weekend, another “significant weather system” may move in Monday, bringing with it another surge of cold air from the north.

“Most of the computer simulations of the weather through Monday and Tuesday keep snowfall to the south of the area,” reads the statement. “…mostly over Oregon…but there is a chance that accumulating snow could develop over western Washington on Monday.”

Here’s the entire statement, which was released at 12:35pm on Saturday, Nov. 20th:

… Cold and windy Monday with another surge of Canadian air…

The first round of cool air has arrived… but another colder surge of Canadian air is expected Monday and Tuesday. The region will see scattered light snow showers or flurries through Sunday night… but a more significant weather system is possible on Monday.

This second surge of colder air on Monday will be accompanied by another blast of cold Fraser River outflow… but this time it is likely that the cold air will sweep south throughout western Washington. Most of the computer simulations of the weather through Monday and Tuesday keep snowfall to the south of the area… mostly over Oregon… but there is a chance that accumulating snow could develop over western Washington on Monday.

The forecast now is for 1 to 3 inches of snow to fall on Monday south of Olympia. People in southwest Washington may encounter winter driving conditions on Monday.

The most likely scenario now is this next cold upper trough sweeps through the area quickly… limiting snow to only the southernmost portion of the state. Stay tuned for updated forecasts as conditions change.

We’ll continue to monitor all weather reports, so check back often for the latest.

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