Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 451 PM EDT Sun Jul 09 2017 Valid 00Z Mon Jul 10 2017 - 00Z Wed Jul 12 2017 ...There is a slight risk of severe thunderstorms Upper Midwest... ...Heavy rain possible over parts of the Middle/Upper Mississippi Valley and the Ohio Valley... A front extending from Southeastern Canada westward to the Great Lakes into the Northern High Plains will dissipate over parts of Southeastern Canada and Northern New England/Great Lakes by Monday afternoon. A wave of low pressure over the Northern Plains will move eastward to Southeastern Michigan while the associate boundary begins to dissipate by Tuesday. Rain will develop over parts of the Northeast and the Lower Great Lakes overnight Sunday ending by Monday morning. Showers and thunderstorms will develop over parts of the Upper Mississippi Valley and the Upper Great Lakes on Sunday evening that will move southeastward by Monday morning into parts of the Ohio Valley and Middle Mississippi Valley while continuing over parts of the Upper Mississippi Valley/Upper Great Lakes. The showers and thunderstorms will move out of the Upper Mississippi Valley by late Monday evening. Showers and thunderstorms will move into parts of the Northeast and the Lower Great Lakes by Monday evening and continuing into Tuesday. Likewise, showers and thunderstorms will continue over parts of the Middle Mississippi Valley into parts of the Ohio Valley/Great Lakes through Tuesday. Meanwhile, a front moving eastward over the Pacific Northwest will advance to parts of the Northern Plains westward to the Great Basin by Tuesday. Showers and thunderstorms will develop over parts of the Northern Rockies/Northern High Plains overnight Sunday that will move eastward to the Northern Plains and into parts of the Central Rockies by Tuesday morning. In addition, moisture and upper-level energy will trigger showers and thunderstorms over parts of the Great Basin/Southwest into the Central/Southern Rockies into Tuesday morning. Elsewhere, moisture rich air will aid in producing showers and thunderstorms over parts of the Southern Mid-Atlantic/Southeast westward into the Western Gulf Coast through Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php