Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 AM EDT Tue Oct 10 2017 Valid 12Z Tue Oct 10 2017 - 12Z Thu Oct 12 2017 ...Heavy rain possible over parts of Middle Mississippi/Western Ohio Valleys... ...Light snow possible over parts the Northern Rockies and Cascades... ...Temperatures will be 15 to 20 degrees below average over parts of the Central Plains/Middle Mississippi Valley... A slow moving front extending from the Lower Great Lakes to the Middle Mississippi Valley southward to the Lower Mississippi Valley/Western Gulf Coast that will merge with a boundary over the Mid-Atlantic by Tuesday evening. The front will then move eastward to the Central Appalachians/Mid-Atlantic southward to the Carolinas and the Southeast by Wednesday evening. Showers and thunderstorms will develop along and ahead of the boundary from the Middle/Lower Mississippi Valley into the Western Gulf Coast that will move eastward to parts of the Western Ohio/Tennessee Valleys by Tuesday evening. Overnight Tuesday, the showers and thunderstorms will dissipate over the Tennessee Valley while continuing over the Ohio Valley eastward to parts of the Mid-Atlantic by Wednesday morning. On Wednesday as the showers and thunderstorms move to Mid-Atlantic, showers and thunderstorms will redevelop along and ahead of the front from the Southern Mid-Atlantic to the Southeast, continuing over the region through Wednesday evening. In addition, rain will develop over parts of the Central Plains/Middle Mississippi Valley that will expand northward into parts of the Great Lakes Tuesday evening into Wednesday morning. The rain will end over the Central Plains by Tuesday evening and over the Middle Mississippi Valley by Wednesday morning. The rain will move into parts of the Northeast/Northern Mid-Atlantic on Wednesday into Wednesday evening. Furthermore in the warm sector, showers and thunderstorms will also develop over parts of the Southern Ohio Valley/Tennessee Valley eastward to the Southern Mid-Atlantic/Southeast on Tuesday ending overnight Tuesday over the Tennessee Valley into parts of the Southeast. ...more to follow... Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php