Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 420 PM EDT Sat May 13 2017 Valid 00Z Sun May 14 2017 - 00Z Tue May 16 2017 ...Heavy rain possible over parts of New England Coast... Low pressure just off the Northern Mid-Atlantic Coast will continue to deepen as the storm moves of just off Maine and south of Nova Scotia by Monday. The associated front will slowly move southeastward off the Southeast Coast by Sunday morning and clear the Florida peninsula by early Monday. Likewise, showers and thunderstorms will move off the Southeast Coast by Sunday and off the southern tip of Florida by Monday morning. The storm will stream moisture into the Northeast through Sunday afternoon while the moisture flow slowly weakens on Sunday evening into Monday. The system will produce rain from the Northern Mid-Atlantic into parts of the Northeast with the rain ending by Sunday morning over the Northern Mid-Atlantic. On Sunday into Monday the rain will continue over the Northeast. Additional upper-level energy over the Great Lakes/Northern Mid-Atlantic will move eastward off Southern New England Coast overnight Sunday. The energy will produce rain over parts of the Great Lakes moving into the Northern Appalachians by Sunday afternoon. Meanwhile, an upper-level low along the Pacific Northwest/Western Canadian border lifts northeastward into Central Canada by Sunday night into Monday. More upper-level energy rotating around the upper-level low will move into Central California while deepening as the energy pushes into parts of the Great Basin by Monday. The energy will produce rain and higher elevation snow over parts of the Pacific Northwest into the Northern Rockies. Overnight Saturday, an area of rain will move into the Northern High Plains that will move into the Upper Mississippi Valley/Upper Great Lakes by Monday. On Sunday afternoon, rain and the highest elevation snow will move into parts of Northern California. Overnight Sunday, the precipitation will wane to a few small areas over Central California and parts of the Northern Rockies/Great Basin. On Monday morning, the rain will be confined to the Northwestern Coast of Washington State. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php