Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 417 PM EDT Thu Mar 12 2015 Valid 00Z Fri Mar 13 2015 - 00Z Sun Mar 15 2015 ...Heavy rain possible from the Lower/Middle Mississippi Valley into the Ohio and Tennessee Valleys... ...Temperatures will be 10 to 25 degrees above average over the Missouri Valley into the Upper Mississippi Valley... Low pressure moving northward out of the Gulf of Mexico will later merge with front moving southeastward from the Northern High Plains over the Ohio Valley by Saturday. Gulf low will pull moisture out of the Gulf of Mexico that will overrun associated front producing showers and thunderstorms over the Lower Mississippi Valley/Central Gulf Coast that will move to the Southeast by Saturday. The overrunning moisture will produce light to moderate rain over parts of the Middle Mississippi, Tennessee, and Ohio Valleys by Friday morning that will move northeastward into the Mid-Atlantic/Eastern Ohio Valley and parts of Southern New England by Saturday morning. A front over the Northern High Plains will move southeastward to the Great Lakes/Southern Plains by Saturday. The system will produce light rain over parts of the Upper Great Lakes on Friday morning into Saturday with a few pockets of rain/freezing rain over the UP of Michigan on Saturday morning. The storm will also produce light snow over parts of Northern New England with pockets of rain/freezing rain near the rain/snow line on Saturday. Upper-level energy over the Great Basin/Southwest will move southward into Mexico by late Friday. The system will produce snow and lower elevation rain over parts of the Great Basin/Southwest and Central Rockies that will taper off to a small area of snow and rain over parts of the Central Rockies by Saturday morning. In addition, an approaching front over the Northern Pacific will produce light to moderate rain over parts of the Pacific Northwest on Saturday morning. Rain will also develop farther inland over parts of the Northern Intermountain Region, too. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php