Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 348 PM EST Sun Nov 03 2013 Valid 00Z Mon Nov 04 2013 - 00Z Wed Nov 06 2013 ...More snow for portions of the northern and central Rockies... ...Significant rains returning to the southern and central Plains on Tue... ...Below average temperatures for the East tonight and tomorrow... In the Pacific Northwest, a weakening frontal system nearing the coast is expected to bring light precipitation into the region beginning later today and continuing into Tue. Meanwhile, a pair of upper disturbances dropping out of western Canada and the eastern Pacific into the western U.S. are expected to produce mainly light snows across parts of the northern and central Rockies. Across the central U.S., deep southwesterly winds across northern Mexico into the southern Plains are expected to carry moisture associated with tropical storm Sonia, fueling showers and thunderstorms across the Big Bend region on Texas into the central and northeastern parts of the state on Mon. Precipitation is expected to become more widespread across the southern Plains by early Tue as this moisture becomes further fortified with moisture from the Gulf of Mexico moving inland along the western periphery of an area of strong high pressure centered over the eastern U.S. Further to the north, a well-defined area of low pressure is forecast to lift across central Canada, with its trailing cold front moving across the northern and central Plains. Removed from any deep moisture, a mostly dry frontal passage is expected across these regions until early Tue when the front begins to slow and focus the previously noted moisture from the Gulf that is surging north into the central U.S. By early Tue, expect moderate to locally heavy rains to develop across portions of the central Plains, mid Missouri and Mississippi valleys. Further to the west, deeper into the cold air, light to moderate snows are expected across the central High Plains early Tue. Across the eastern U.S., with the exception of some showers promoted by the onshore flow along the Southeast coast, high pressure and dry conditions are expected through the period. After a chilly night tonight and day tomorrow, with below normal temperatures up and down much of the East Coast, temperatures will begin to moderate by Tue as the high pressure center shifts east, allowing southerly winds to return to the region. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php