Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 304 PM EST Fri Feb 16 2018 Valid 00Z Sat Feb 17 2018 - 00Z Mon Feb 19 2018 ...Snow possible for parts of the Central Appalachians/Northern Mid-Atlantic... ...Heavy snow possible for the Cascades and the Northern Rockies... ...Heavy rain possible over parts of the Pacific Northwest... A front extending from the Southern Mid-Atlantic to the Western Gulf Coast will have a wave of low pressure develop over the Central Gulf Coast on Friday evening. The low will move northeastward to the Southern Mid-Atlantic Coast by Saturday evening then move out over the Western Atlantic by Sunday morning. The boundary will settle southward over the Southeast by Sunday morning as well. The system will produce rain over parts of Southern New England/Mid-Atlantic southwestward into the Tennessee Valley and move off most of the Northeast/Northern Mid-Atlantic by late Friday night and off the Southern Mid-Atlantic Coast by Saturday morning. The rain may change over to snow briefly before ending from Southern New England to the Central Appalachians during the evening hours on Friday. Meanwhile, moisture moving northwestward over the Southern Plains from the Western Gulf of Mexico will overrun the boundary over the Western Gulf Coast producing rain over parts of the Southern Rockies into the Southern Plains/Central Gulf Coast on Friday evening. As the surface wave of low pressure begins to move northeastward into the Southern Plains and parts of the Lower/Middle Mississippi Valley by Saturday morning and ending over the Southern Rockies/Southern High Plains overnight Friday. The rain will move into the Southern Ohio/Tennessee Valleys on Saturday moving into the Mid-Atlantic by Saturday evening. In addition by Saturday evening, snow will develop over parts of the Northern Mid-Atlantic moving into parts of New England overnight Saturday into Sunday morning. The rain will move off the Mid-Atlantic Coast by Sunday morning while ending over the Southern Mid-Atlantic into the Central Gulf Coast overnight Saturday. More to Follow Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php