Jan08 Northern Hemisphere snow cover: largest anomaly since 1966

Here.

So how does that observation fit with climate models based on notions like this:

An important positive feedback is the ice and snow albedo feedback. Sea ice and snow have high albedo. This means that they reflect most of the solar radiation. With warmer polar temperatures, the area of sea ice and snow cover decreases, exposing new expanses of ocean and land surfaces that absorb an increased amount of solar radiation. This increase of total absorbed solar radiation contributes to continued and accelerated warming. Many IPCC climate models suggest a major loss in sea ice cover by the mid 21st century caused by albedo feedback from shrinking snow cover and increased open water areas in summer.

Specifically, why isn't the snow cover shrinking, and why isn't the warming accelerating?