A clipper system will move quickly across the Great Lakes to the Northeast then out over the Western Atlantic by Friday. The system will produce lake enhanced/lake effect snow over the Great Lakes through Thursday evening, with the snow moving into the Northeast by Friday morning. In the wake of the storm, lake effect snow will develop downwind from the Great Lakes on Friday. Temperatures will be 10 to near 20 degrees below average from the Great Lakes to the Southern Plains/Western Gulf Coast to the Mid-Atlantic/Northeast. This image was taken by the Suomi NPP satellite's VIIRS instrument around 1830Z on December 11, 2013.