Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 AM EDT Sat Apr 16 2016 Valid 12Z Sat Apr 16 2016 - 12Z Mon Apr 18 2016 ...Heavy snow expected for portions of the Rockies and Front Range... ...Heavy rain and severe thunderstorms possible for portions of the central and southern plains today... ...Dry conditions and above average temperatures expected for the Great Lakes, Mid-Atlantic, and Northeast... The low pressure system over the northern and central plains continues to nudge slowly to the east. Numerous showers and thunderstorms have developed along and ahead of the boundary, and are producing higher precipitation amounts for in the higher elevations of the Rockies and the surrounding areas. Snow will gradually spread to lower elevations as colder air moves into the Front Range and foothills today and will persist across the Rockies, Front Range, and foothills - heavy snowfall accumulations will be possible. Rain will also mix with snow across portions of western Nebraska on this afternoon before changing to mostly snow by tonight into Sunday. Three day totals of 3 to 4 inches will be common along the Rockies and western plains, with isolated higher amounts possible. The southern portion of front will spill south and east from the southern Rockies into the southern plains. Widespread showers and thunderstorms are expected throughout the day today. Due to the lack of movement of the frontal boundary, the risk for flash and river flooding will be elevated. Additionally, the Storm Prediction Center is forecasting a chance of severe thunderstorms across portions of the southern and central plains today and over south-central Texas on Sunday and Monday. A few showers and thunderstorms will be possible today for the southeastern states near a weakening frontal boundary. Mostly dry and mild conditions will is forecast this weekend from the Mid-Atlantic to the Northeast as high pressure dominates the weather pattern. Afternoon temperatures are expected to be near or above average. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php