Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 AM EDT Thu Apr 26 2018 Valid 12Z Thu Apr 26 2018 - 12Z Sat Apr 28 2018 ...Temperatures will be 10 to 15 degrees below average over parts of the Tennessee Valley... Low pressure over the Northeast will lift northeastward into Eastern Canada by Thursday evening. The system will produce rain over the Northeast that will end overnight Thursday. A second area of low pressure over Tennessee Valley will move northeastward to the Northern Mid-Atlantic Coast by Friday evening. The storm will produce rain with embedded thunderstorms over parts of the Tennessee and Lower Mississippi Valleys that will move eastward to the Southeast by Thursday evening. The precipitation will be showers and thunderstorms over parts of the Southeast and rain extending from parts of the Tennessee/Lower Mississippi Valleys into the Southern Ohio Valley/Mid-Atlantic. On Friday morning, an area of showers and thunderstorms will develop over parts of the Mid-Atlantic Coast with rain extending from parts of the Northern Mid-Atlantic to parts of the Southern Mid-Atlantic. By Friday evening, rain will move into Northern New England extending southward to parts of the Southern Mid-Atlantic. Meanwhile, a front extending from the Upper Great Lakes southwestward to the Southern High Plains/Southern Rockies will move eastward to the Lower Great Lakes to parts of the Tennessee Valley/Lower Mississippi Valleys by Friday evening. The boundary will produce rain over parts of the Upper Mississippi Valley that will, likewise, move eastward to the Lower Great Lakes/Ohio Valley/Central Appalachians by Friday evening into Saturday. In addition, a clipper system over South-Central Canada will move southeastward to Illinois by Friday evening. The storm will begin to produce rain over parts of the Upper Mississippi Valley overnight Thursday that will move into parts of the Upper Great Lakes/Ohio Valley by Friday evening. Another front will move onshore over the West Coast overnight Thursday advancing eastward to the Northern Intermountain Region to Southern California by Friday evening. The system will begin to produce rain over parts of California by Thursday evening. Overnight Thursday, the rain will move into parts of the Pacific Northwest/Northern California that will expand inland to parts of the Northern Intermountain Region overnight Friday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php