Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 320 PM EST Sat Jan 25 2014 Valid 00Z Sun Jan 26 2014 - 00Z Tue Jan 28 2014 ...Another surge of arctic air for the central and eastern U.S.... ...Continued warm and dry for the West.... As the polar jet continues to dip well to the south across the eastern U.S., temperatures will remain below average across much of the Midwest and eastern U.S. Another significant reinforcing surge of arctic air is expected early next week, impacting much of the U.S. east of the Rockies. Early in the period, an arctic cold front extending from the Great Lakes back through the Ohio valley will continue to advance to the south and east, with mainly light snows spreading out ahead the front through the middle Atlantic states and Northeast before the front moves offshore this evening. Snow accumulations are expected to be mainly light, with perhaps the exception of Down East into northern Maine where the inclusion of Atlantic moisture may fuel some heavier totals. Meanwhile further to the west, light to moderate snows with windy conditions across the Dakotas this afternoon will shift east through the upper Mississippi valley into the upper Great Lakes tonight-early Sunday as a developing area of low pressure drops out of Canada into the upper Midwest. Trailing this low will be a strong arctic front that will surge south and east through the central and eastern U.S., reaching both the Gulf and Atlantic coasts on Monday. This will send overnight lows Sunday night into Monday into the single digits as far south as the central plains to the lower Ohio valley, while temperatures plunge as low as the minus 20s across the upper Mississippi valley. West of the Rockies, the story remains quite different. Dry with seasonal to above average temperatures are expected to persist across the region into the early part of next week. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php