It's the winter that won't give up. Every time I look out the window this week, it's snowing.

Snow in March is not that unusual, but this particular situation--extended periods of light snow in between specific storms--results from a few factors. First, there is a messy and disorganized upper level disturbance in the Northeast, generally unsettling the atmosphere. Second, winds have been persistently off the water, adding low level moisture. And finally, the high sun angle fuels this instability, making the moisture rise into clouds that in turn produce more snow. It's not that different from the constant tropical rains in a summertime air mass.

Although a summertime air mass sounds much better right now.