Update, 4:35 p.m.

The National Weather Service in Seattle just issued a short-term forecast:

NOW - HEAVY SNOW SHOWERS ASSOCIATED WITH THE LEADING EDGE OF ARCTIC

AIR WILL DROP SOUTH THROUGH NORTHERN KING AND WESTERN SNOHOMISH

COUNTIES DURING THE EVENING COMMUTE. THESE SHOWERS ARE CAPABLE OF

PRODUCING LOCALLY HEAVY SNOWFALL AMOUNTS IN A SHORT TIME.

(I don’t know why it publishes so

haltingly.)

At 4 p.m. Seattle activated its Emergency Operations Center for this evening’s and Thursday morning’s commutes. And our partners at The Seattle Times quote a forecaster: “It’s not going to be a good day to work late.”

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Metro Transit is gearing up for possible snow this afternoon by chaining up buses and planning to move from regular routes to snow routes.

Metro buses will move to snow routing as travel conditions change. When buses move to snow routes, it will be announced through Transit Alerts and on the Metro Online website. Check the status for your route before you travel.

People without online access can call the Customer Information Office at (206) 553-3000. General information about service will also be sent out via the kcmetrobus Twitter account.

Expect buses to be crowded and significantly delayed when on snow routes and travel is difficult. Also, many people may leave work early today, so take that into consideration in deciding when to travel. Metro encourages people to limit travel if possible if roads become snowy and icy.