The news here in the Washington D.C. area wasn't that it was snowing, it was the quantity of snow all at once. Where I am in Northern Virginia, it snowed for over 24 hours straight and we got probably over 20 inches at my place. For here, that is a HUGE amount all at once. The schools were closed because they couldn't get everything cleared quickly enough. In my area especially there are a lot of places where kids just cannot walk to school (like where I live: Too far, no sidewalks, rural winding two-lane roads through woods). In D.C. the issue was the sidewalks were piled with snow from the snowplows overnight and the kids would have had to walk in the streets.
We're so close to the winter holiday break, they just called the break a bit early. I'm not complaining. This means I get to sleep in too
edit: Also, several years ago, they didn't close the schools after a snow, the plows went through, the roads were slick, a bus crashed and a couple kids died. The area is still a bit paranoid even though that was about 15 years or so ago