Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 416 PM EDT Thu Jun 02 2016 Valid 00Z Fri Jun 03 2016 - 00Z Sun Jun 05 2016 ...There is a slight risk of severe thunderstorms over parts of the Northern Plains... ...Heavy rain possible over parts of the Southern Plains and Lower Mississippi Valley... ...Temperatures will be 10 to 15 degrees below average over parts of the Southern Plains... ...Tropical Depression Bonnie is forecast to weaken and move eastward out over the Western Atlantic... A weakening front extending from the Northern Appalachians roughly southwestward to the Southern Plains will slowly dissipate while the northern portion of the boundary links up with another front moving eastward over the Upper Midwest on Friday. Showers and thunderstorms will develop along and near the boundary from parts of the Northeast to the Tennessee Valley and westward to parts of the Southern Plains on Thursday evening. The northern portion of the showers and thunderstorms will move off the Northeast Coast by Friday evening, while the southern portion will move eastward to the the Mid-Atlantic and will be confined to an area over parts of the Mid-Atlantic by Saturday morning. Meanwhile, an upper-level low over the Southern Plains will be mainly quasi-stationary, but will be slowly inching towards the Western Gulf Coast by Saturday morning. The system will produce showers and thunderstorms over parts of the Southern High Plains through Thursday night. The showers and thunderstorms will also develop over parts of the Southern Plains/Lower Mississippi Valley through Saturday. In addition, showers and thunderstorms associated with Tropical Depression Bonnie will move off the Southern Mid-Atlantic Coast overnight Thursday. Furthermore, daytime heating and tropical moisture will aid in producing showers and thunderstorms over parts of the Southeast mainly during the afternoon and evening on Thursday and Friday. Additionally, onshore flow from the Pacific will aid in producing rain over parts of the Pacific Northwest into parts of the Northern Intermountain Region through late Thursday night then ending by Friday morning as the onshore flow weakens. In the meantime, a front over the Northern High Plains/Northern Rockies will move southeastward to the Upper Mississippi Valley/Upper Great Lakes then roughly southwestward to the Southern High Plains by Saturday. The storm will produce showers and thunderstorms over parts of the Northern High Plains on Thursday evening that will move eastward to the Upper Mississippi Valley/Upper Great Lakes and parts of the Northern Plains by Friday evening. On Friday evening, showers and thunderstorms will expand along the front over parts of the Middle Mississippi Valley into parts of the Southern Plains. By Saturday morning, the showers and thunderstorms will move to the Upper Great Lakes roughly southwestward to the Southern Plains. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php