Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 127 PM EST Fri Jan 29 2016 Valid 00Z Sat Jan 30 2016 - 00Z Mon Feb 01 2016 ...Heavy snow possible for parts of the Cascades, Rockies, and the Sierras... ...Locally heavy rain possible for portions of the Pacific Northwest... ...Above average temperatures expected to expand from the central into the eastern U.S... A cold front will move across the western U.S. tonight and Saturday. The front will initially bring snow to the higher terrain with rain in the valleys. However, snow levels will drop as the front passes, and precipitation will mix with or change to snow even in most valleys in the interior western U.S. by late Saturday. The frontal boundary will stall across the Four Corners region by Sunday as another upper-level disturbance approaches the region. This will prolong precipitation across the southwestern U.S. and the Four Corners region through Sunday. Heavy snow is possible across portions of the Cascades, Sierras, as well as across portions of the Rockies. Snowfall amounts of may exceed 1 foot across portions of these areas through Sunday evening. Additionally rainfall amounts of 1 to 2 inches, with locally higher amounts, are possible across the coastal Pacific Northwest and portions of southern California. A warm front will bring a mix of light snow, sleet, and freezing rain to portions of the Upper Great Lakes tonight. The same front will bring a scattered mix of rain and snow showers to portions of the Northeast on Saturday. Meanwhile, a low pressure system will develop across the central/northern plains Saturday afternoon. This system will spread another round of wintry precipitation across the Upper Midwest and Upper Great Lakes Saturday into Sunday, with rain showers farther south across the Ohio valley. Temperatures will be above average across the central U.S. on Saturday, with afternoon high temperatures expected to be 10 to 20 degrees above average across the plains, Great Lakes, and Ohio valley. The warmer temperatures will spread into portions of the eastern U.S. on Sunday, with high temperatures expected to be 10 to 20 degrees above average from the Appalachians to the East Coast states. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php