For most of the United States, the winter of 2010 - 2011 has been downright AWFUL! Unless of course you're an outdoor winter sports fan...
For most inground pool owners, this is not a serious issue. As long as the pool was properly winterized, the ice and snow will melt and it's only a matter of pumping the excess water off of the cover.
DO NOT try to break up the accumulated ice and snow. Odds are, you will damage the cover and patio.
Be sure to drain it away from yours or your neighbor's home.