New York Today: Beware of Widespread Black Ice

Marilynn K. Yee/The New York Times Subways should run more smoothly, but watch out for icy platforms.

Good Thursday morning. Our wintry ordeal continues.

The road sludge has turned into ice. Black ice.

Here’s what you need to know:

- The storm headed out to sea, and cold air moved in. “Any kind of slush and standing water left froze hard overnight,” said Nelson Vaz, of the National Weather Service.

- A winter weather advisory, which warns of widespread black ice, is in effect until 10 a.m.

- The morning will be the most dangerous time, but there could be melting and refreezing throughout the day.

- Secondary streets and poorly shoveled sidewalks may be particularly slick. Get out the crampons, again.

- It will remain in the 20s all day, with a high of 28. It may stay below freezing through the weekend. But dry. No more freezing drizzle.

- Subways and commuter rails should be running on normal schedules. Check “Commute”  below for updates.

- Alternate-side parking is suspended.

- Schools are open in the city. Some suburban schools will open late. See list.

- The city’s schools chancellor, Carmen Fariña, defended her decision not to close schools on Wednesday, saying, “What about the kids for whom the school is a safe haven?”

- Con Edison has asked customers in Harlem to avoid using extra lights and appliances like washers, dryers and dishwashers because of problems with electric cables.

- The city got an emergency shipment of 2,000 tons of salt before the storm. Mayor de Blasio said the city had plenty. But Governor Cuomo said the rest of the state was in danger of running out.

- Blood is in short supply. If you can donate, call (800) 933-2566 or go to nybloodcenter.org for details. Mayor de Blasio says he will donate.

- There has been a lot of talk about a major storm this weekend. That doesn’t seem likely, the National Weather Service said. Maybe some light snow.

COMMUTE

Subways: Check latest status.

Rails: Check L.I.R.R., Metro-North or New Jersey Transit status.

Roads: Check traffic map or radio report on the 1s or the 8s.

COMING UP TODAY

- Mayor de Blasio makes an announcement at the Osborne Association, a nonprofit in the Bronx that helps former prisoners. 2:30 p.m.

- Goodfella’s Pizzeria in Staten Island donates a fork, which the pizza purveyors say the mayor used to eat pizza, to the Stephen Siller Tunnel to Towers Foundation. 11 a.m.

- The four-day Athena Film Festival â€" “a celebration of women and leadership” â€" begins at Barnard College. [$12 per film, $65 festival pass]

- Fashion Week opens with appearances by Tadashi Shoji, Marissa Webb and Todd Snyder. Lincoln Center and all over Manhattan. 9 a.m. [Live webstream]

- The Bergino Baseball Club auctions off baseball-card-based art to benefit a fitness programs for children. East Village. 6 p.m. [Free, with party]

- The prolific Joyce Carol Oates talks about her new book, “Carthage,” at Powerhouse Arena in Brooklyn. 7 p.m. [Free, R.S.V.P]

- The Empire State Building wears red for American Heart Month. [Free, look up]

- For more events, see The New York Times Arts & Entertainment guide.

Joseph Burgess contributed reporting.

New York Today is a morning roundup that stays live from 6 a.m. till late morning.

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