Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 237 PM EDT Sat Mar 26 2016 Valid 00Z Sun Mar 27 2016 - 00Z Tue Mar 29 2016 ...Flash flooding possible across portions of the Gulf Coast and southeastern U.S... ...Heavy snow will taper off tonight for portions of the southern Rockies... ...Unsettled weather expected to return to the northwestern U.S. tonight into Sunday... A stationary frontal boundary lingering across the Gulf Coast and southeastern U.S. will begin to move slowly north as a warm front on Sunday. This frontal boundary along with persistent moist and unstable southerly flow from the Gulf of Mexico will continue to produce widespread showers and thunderstorms across much of the central/eastern Gulf Coast states and the southeastern U.S. into Sunday. Heavy rain will be possible, particularly along the Gulf Coast and into the coastal Southeast, where an additional 1 to 3 inches of rainfall are possible. Heavy rain will result in the possibility of flash flooding for some areas. Low pressure will move along a frontal boundary from the southern Rockies into the southern plains tonight. This system is producing snows, heavy at times, across portions of the southern Rockies and Front Range in Colorado and New Mexico this afternoon, and this is expected to continue into tonight, before gradually winding down early Sunday morning. Farther north, another area of low pressure will bring rain and snow to portions of the Upper Midwest and Upper Great Lakes tonight into Sunday. This low pressure system will move east across the Great Lakes Sunday night, and will bring rain to much of the Mid-Atlantic and Northeast Sunday night into Monday. A mix of rain and snow will be possible for northern New England. A Pacific low pressure system and cold front will move into the northwestern U.S. tonight, with rain and mountain snows increasing across the region into Sunday. By late Sunday the system will move into the Intermountain West, and snow levels will begin to decrease as colder air moves into the West in association with the upper-level trough. Thus, expect snow to become more widespread across the Intermountain West and portions of the Rockies on Monday, with heavy snow possible for some areas. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php