Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 259 PM EST Fri Nov 17 2017 Valid 00Z Sat Nov 18 2017 - 00Z Mon Nov 20 2017 ...Heavy precipitation possible over the Olympic Peninsula... ...Heavy precipitation possible over parts of the Ohio Valley/Lower Great Lakes... A front extending from the Middle Mississippi Valley/Central Plains into Central Rockies/Southwest will move eastward to the East Coast by Sunday. Showers and thunderstorms will develop along and near the warm front over the Middle Mississippi Valley that will expand into the Ohio Valley overnight Friday. On Saturday afternoon, the showers and thunderstorms will develop along and ahead of the cold front from the Ohio Valley into the Lower Mississippi Valley More to Follow Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php