Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 257 AM EST Tue Jan 31 2017 Valid 12Z Tue Jan 31 2017 - 12Z Thu Feb 02 2017 ...Heavy snow possible across the Northern Rockies... ...Snow possible from the Upper Great Lakes into the Northeast... Low pressure over the Great Lakes will move eastward off New England Coast by Wednesday morning. The system will produce rain and snow over parts of the Ohio Valley that will move to the Mid-Atlantic Coast by Tuesday afternoon while more rain and snow develops over the Ohio Valley by Wednesday morning. The area of rain and snow will, likewise, move to the Mid-Atlantic by Wednesday evening. In addition, snow will develop over parts of the Upper Mississippi Valley/Great Lakes that will expand into parts of the Northeast through Wednesday evening. The snow will wane to lake effect snow over parts of the Great Lakes on Wednesday into Wednesday evening. Meanwhile, moisture moving inland over parts of the Northwest and upper-level energy will aid in producing rain and higher elevation snow over parts of the Pacific Northwest through Wednesday morning. Additionally, snow will also develop over parts of the Northern Intermountain Region/Northern Rockies that will expand into parts of the Central High Plains on Tuesday into Wednesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php