Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 408 AM EDT Wed May 29 2013 Valid 12Z Wed May 29 2013 - 12Z Fri May 31 2013 ...There is a slight risk of severe thunderstorms over parts of the Northeast... ...There is a slight risk of severe thunderstorms from the Southern Plains to the Upper Midwest, with an embedded area of moderate risk of severe thunderstorms over Western Kansas, Oklahoma, and a bit of the Texas panhandle... ...Heavy rain is possible over Central Plains/Middle Mississippi Valley, The Northern High Plains, and southern tip of Florida... A storm over the Plains will pull moisture out of the Gulf of Mexico northward over the Plains into the Mississippi Valley/Great Lakes by Thursday evening. The system will produce showers and thunderstorms over parts of the Northern/Central Plains on Wednesday that will expand southward ahead of a dryline over the Southern Plains and eastward into parts of the Great Lakes. The showers and thunderstorms will continue over parts of the Upper Midwest and advance eastward into the Mississippi Valley on Thursday. In addition, light to moderate rain will develop over parts of the Northern High Plains, also on Thursday. Meanwhile, easterly flow around high pressure over the western Atlantic will stream moisture rich air over the southern tip of Florida. With the aid of upper-level energy, showers and thunderstorms will develop over the southern part of Florida through Thursday evening. Additionally, a warm front extending from Ontario to Southern New England will lift northward into Southeastern Canada by Thursday. Showers and thunderstorms will develop over parts of the Great Lakes into the Northeast will move into Canada also by Thursday. An area of light to moderate rain will develop just north of the warm front over Maine, Wednesday afternoon into late Wednesday night. Elsewhere, a weakening front will move into the Pacific Northwest on Wednesday, producing rain over the area moving into the Northern Rockies by Wednesday evening. Onshore flow will keep light rain over parts of the Washington State coast into the higher elevations to the east. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php