Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EST Fri Nov 28 2014 Valid 00Z Sat Nov 29 2014 - 00Z Mon Dec 01 2014 ...Milder weather is expected to spread eastward into the eastern U.S. while another surge of arctic air will plunge into the northern and central U.S. this weekend... ...Rain should change to snow showers following the passage of an arctic cold front in the Pacific Northwest... With a cold high pressure system in control, the eastern U.S. will start out the weekend with colder than normal temperatures. Meanwhile, much warmer air has been building up in the central Plains. As the high slides off the Atlantic coast, the pool of warm air will be pushed eastward into the eastern U.S. during the weekend. At the same time, arctic air has been building up in western Canada. The arctic front is forecast to plunge into and across much of the northern Plans and northern Rockies on Saturday, bringing a drastic drop in temperatures across these areas together with a burst of snow over much of the Intermountain Region. Arctic air will also filter in the Pacific Northwest with snow showers and subfreezing low temperatures. By Sunday, the arctic front should reach the central Rockies, into the southern Plains, as well as the Great Lakes. Some freezing rain can be expected in the Great Lakes on Saturday ahead of a warm front before the arctic air arrives on Sunday. Over the West Coast, periods of heavier rain can be expected in northern California ahead of the cold front which is forecast to stall during the weekend. Elsewhere, dry and warmer than normal weather will extend through the weekend across the Desert Southwest and the southern Rockies. The weather in the South should also be fine with milder than normal temperatures. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php