Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 332 AM EST Mon Mar 02 2015 Valid 12Z Mon Mar 02 2015 - 12Z Wed Mar 04 2015 ...Heavy snow possible over parts of the Central Rockies... ...Temperatures will be 10 to 25 degrees below average over parts of the Southern/Central Plains... A front along the Eastern Sea Board to the Gulf Coast will move off the East Coast by Monday afternoon. The system will produce light snow over parts of the Lower Great Lakes to Northern New England on Monday, ending later Monday evening over Northern New England. A wave of low pressure along the boundary over the Central Gulf Coast/Lower Mississippi Valley will produce showers and thunderstorms over Lower Mississippi Valley to the Central Gulf Coast through Monday evening. Rain will also develop over the interior parts of the Lower Mississippi Valley/Tennessee Valley through Monday evening, too. Meanwhile, a front moving southward out of West-Central Canada will move southeastward to the Great Lakes/Middle Mississippi Valley to the Southern High Plains then banked up against the Northern Rockies by Tuesday evening. In addition, an upper-level closed low just off the Southern Coast of California will open and move northeastward to the Great Lakes by Tuesday evening. Additional upper-level energy over the Pacific Northwest will move southward and form a new closed upper-level low just off the northwest coast of Mexico by Tuesday. The energy moving out of California will aid in producing snow over parts of the Great Basin/Central Rockies late Monday night. Light to moderate rain will develop over parts of the Southwest through Monday evening. As the front moves south out of Canada, light snow will develop over parts of the Northern Rockies/High Plains by Monday evening. The upper-level energy coming out of California will merge with the energy associated with the boundary moving out of Canada on Tuesday. The complex system will produce snow over parts of the Central Rockies to the Upper Great Lakes on Tuesday morning that will move to Northern New England by Tuesday evening. Rain will develop over parts of the Southern Plains/Middle Mississippi Valley on Tuesday morning will expand into the Ohio Valley/Mid-Atlantic and westward to parts of the Southern High Plains by Tuesday evening. An area of rain/freezing rain will develop over parts of the Western Ohio Valley that will move to parts of Northern Mid-Atlantic by Tuesday evening. Additionally, showers and thunderstorms will develop over parts of the Lower Mississippi Valley/Central Gulf Coast by Tuesday evening, too. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php