The Midwest and Northeast U.S. is bracing for yet another winter storm to strike Monday into Tuesday. It is expected that this storm may become one of the worst ever to hit Chicago, with blizzard conditions and 15" of accumulation expected. More than 20 states are currently under storm warnings or advisories from the National Weather Service. The New York City region is expecting 2-5" of snow, on top of icing conditions.

This image from the GOES-East satellite shows the storm on January 31, 2011 at 1945z in both visible and infrared water vapor channels. The visible image shows the massive size of the storm, whereas the water vapor image shows areas of high atmospheric moisture (colored in shades of blue).