City by City in the Blizzard of 2015

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The first major snowstorm of 2015 is expected to hit the Northeastern United States on Monday afternoon. The National Weather Service has upgraded its blizzard watch to a blizzard warning for the area from northern New Jersey through southern Connecticut, including New York City.

Twenty to 30 inches of snow is possible with winds gusting 55 to 65 mph. The Weather Service says whiteout conditions will make travel extremely dangerous in the affected area. The blizzard warning is in effect from 1 p.m. Monday through Tuesday, with the worst conditions expected from late Monday evening through midday Tuesday.

Here’s what’s expected in three major cities.

New York

Snow remains light through Monday evening rush hour.

The heaviest snow is likely between 7 p.m. Monday and noon Tuesday.

New York City Public Schools open Monday, but after-school activities canceled.

Schools probably closed Tuesday.

Alternate side parking in New York City suspended because of snow; meters in effect.

Mayor urges people to avoid city parks because of falling limbs

Garbage, recycling and organics collections suspended.

Governor urges people to work from home Monday.

Boston

Snow will remain light into the evening, with the heaviest snow likely between 4 a.m. Tuesday and early Tuesday evening.

During that time, winds will gust to 50-plus mph; perhaps 70-plus along the Cape.

Boston public schools are open Monday.

Send-off celebration for Super Bowl-bound New England Patriots at 11 a.m. Monday at Boston City Hall Plaza.

Philadelphia

Light snow during the day Monday, with the storm intensifying from overnight to midday Tuesday.

Philadelphia public schools will dismiss students at noon Monday.

Dallas Fort Worth

Sunny most of the week, cloudy Friday, rain during the weekend.