You'd think the clear blue sky would make it warmer.

But no. The sun shines down but it's as cols as it's been for two weeks. The clouds -- when there are some -- keep the warmth in. But today, with a sapphire sky, the air is as crisp and cold as ever. The Hudson River's even affected -- chunks of ice float upstream and cluster along the New York shoreline. It's a scene that's unusual to many here (even commuter ferry service between New York and New Jersey had to cease) but likely a reminder of long ago winters in the Big Apple.