Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 PM EDT Thu Mar 16 2017 Valid 00Z Fri Mar 17 2017 - 00Z Sun Mar 19 2017 ...Heavy snow possible over the Northern Cascades... ...Snow possible over the Upper/Lower Great Lakes into parts of the Northern Mid-Atlantic... A front over the Northern Rockies into the Northern Rockies will move eastward to the Lower Great Lakes and Central/Southern Appalachians westward to the Southern High Plains by by Saturday. The system will produce rain and snow over parts of the Upper Mississippi Valley/Upper Great Lakes that will move eastward into parts of Eastern Ohio Valley by Friday afternoon and into parts of the Northern Mid-Atlantic overnight Thursday into Saturday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php