Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 325 PM EDT Sun Mar 10 2019 Valid 00Z Mon Mar 11 2019 - 00Z Wed Mar 13 2019 ...Lingering snowfall across New England and the Great Lakes with rain farther south across the Gulf Coast to Southern Plains... ...Another round of severe weather and heavy rainfall moves into the Southern Plains on Tuesday... ...Heavy snow possible for the Cascades and San Juan Mountains of Colorado... The large low pressure system that brought heavy snows to the Dakotas and Upper Midwest has exited into Ontario this afternoon. Ongoing snowfall across interior New England should come to an end early Monday, but lake enhanced snows may continue through Monday downwind of the Great Lakes. The western side of the associated frontal boundary is forecast to linger across the Gulf Coast states and into the Southern Plains which should keep showers and thunderstorms in the forecast on Monday and into Tuesday as well. Rain and mountain snows will continue through Monday across parts of Southern California and the Southwest ahead of the next storm system. The best chance for significant snowfall is across the San Juan mountains of Colorado where 1 to 2 feet are expected in the highest elevations. As this system enters the Southwest by Tuesday, showers and thunderstorms should increase across the Southern Plains. Atmospheric conditions could be favorable to support potentially heavy rainfall and severe weather, especially late afternoon and into the evening at the very end of the short range period. Both WPC and SPC have highlighted parts of this region within a slight risk for flash flooding and severe thunderstorms, respectively, on Tuesday. This system is forecast to organize into a significant storm beyond Tuesday and into the beginning of the medium range period. Elsewhere, a cold front dropping into the Pacific Northwest will bring rain and mountain snows to parts of the Northwest late Monday into Tuesday with heavy snowfall possible in the Washington/Oregon Cascades. Temperatures across much of the West and into the Plains should be below to well below normal with expansive surface high pressure across the Central U.S. and the big storm system moving into the Southwest. In the East, near or above normal temperatures on Monday should moderate to near or below average by Tuesday as the Central U.S. high pressure area expands eastward. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php