Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Wed May 14 2014 Valid 00Z Thu May 15 2014 - 00Z Sat May 17 2014 ...There is a slight risk of severe thunderstorms from the Lower Great Lakes/Central Appalachians to the Tennessee Valley and parts of the Southeast... ...Heavy rain possible from the Eastern Gulf Coast to Southern Appalachians to the Northern Appalachians... ...Temperatures will 10 to 15 degrees below average from west of the Appalachians to the Northern/Central Plains and the Lower Mississippi Valley... A slow moving front extending from the Lower Great Lakes/Ohio Valley to the Central Gulf Coast will move to the Northern Appalachians to the Carolina Coast by Friday morning. Moisture from the Gulf of Mexico will pool along the boundary producing showers and thunderstorms, with moderate to heavy rain at times, from the Southeast to Ohio Valley/Lower Great Lakes will move off the most of the Southeast Coast, while remaining over parts of southeastern Virginia on Friday. Moderate to heavy rain will develop over parts of the Great Lakes/Western Ohio Valley that will move eastward while becoming light to moderate rain over parts of the Northeast/Mid-Atlantic by Friday. Another area of light rain will develop under some of the upper-level energy over parts of the Middle Mississippi Valley/Western Ohio Valley on Thursday morning rotating into parts of the Upper Mississippi Valley and the Tennessee Valley by Friday morning. In addition, an area of showers and thunderstorms will develop over parts of the Lower Mississippi Valley on Thursday evening. Meanwhile, energy moving out of South-Central Canada to the Northern Plains Thursday afternoon into Friday will produce light rain over parts of the Northern High Plains on Thursday morning expanding over the area by Thursday evening. By Friday morning, an area of light rain will be over parts of the Central Plains and scattered area of light rain over parts of the Central High Plains by Friday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php