Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 328 PM EST Tue Nov 11 2014 Valid 00Z Wed Nov 12 2014 - 00Z Fri Nov 14 2014 ...Early season cold outbreak will drift south and eastward across much of the eastern half of the country over the next several days... ...upslope snow along the eastern slopes of the Rockies will be light but temperatures will stay remarkably cold... ...High winds will impact parts of the Pacific Northwest and Cascades as cold air also moves westward... The massive area of high pressure invading the north central portion of the nation today will continue to bring conditions more typical of mid winter for the next couple days especially from the Northern and central Rockies into the Plains states and Midwest. Colder air is also spilling into the Pacific Northwest on easterly winds with high winds expected especially along the Columbia River Gorge. The leading edge of the cold air will continue to move south and eastward reaching the Appalachians to mid South by Wednesday morning and reaching the East Coast by Thursday morning. Temperatures along the East Coast will cool down later in the week but temperatures will not drop as dramatically as they did across the middle of the country. While snow is expected to taper off from the storm system over the upper Great Lakes tonight, lingering lake effect snow will continue for the next several days especially downwind of Lakes Superior and Michigan. Intermittent light upslope snow will fall along the eastern slopes of the Rockies with temperatures remaining below 20 degrees until Thursday. Snowfall amounts are expected to be mostly light. Showers along the leading edge of the cold front are expected to become widely scattered as the front moves eastward with much of the moisture not expected to make it east of the Appalachians. However, some showers will occur over New England on Wednesday and along the western Gulf Coast. A surge of moisture from the eastern Pacific Ocean will move across the northern California and Oregon coasts on Wednesday night into Thursday morning, bring coastal rains and mountain snow. As this system continues eastward, snow will spread into portions of the Intermountain West. Snow and freezing rain may also be a concern in the Columbia river basin where cold air will be difficult to scour out. Kocin Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php