10:10 PM: The National Weather Service has just issued a “special weather statement” to underscore its concern about subfreezing temperatures overnight and potentially icy roads tomorrow morning. See the alert here. SDOT says its night crews will be out to treat roads/bridges “as needed.”

4:34 AM: Iced-over windows on street-parked cars … looks like a scraper morning. Latest official temp reading from Sea-Tac – 30.