Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 325 AM EDT Mon Sep 10 2018 Valid 12Z Mon Sep 10 2018 - 12Z Wed Sep 12 2018 ...Hurricane Florence is forecast to become a major hurricane today; residents in the Southeast and Mid-Atlantic should closely monitor Florence... ...Heavy rain possible over parts of the Western/Central Gulf Coast and parts of the Northeast... Low pressure over the Ohio Valley will slowly move northeastward to New England by Tuesday evening. Rain, heavy at times, will develop over parts of the Lower Great Lakes/Central Appalachians and parts of the Northern Mid-Atlantic that will move northeastward into Southeastern Canada by Tuesday evening. The associated front will be quasi-stationary extending from the Northeast southwestward to the Central/Western Gulf Coast by Tuesday into Wednesday. Showers and thunderstorms will develop along and near the boundary from parts of the Ohio/Tennessee Valleys into the Central/Western Gulf Coast. Along the eastern end of the front, the showers and thunderstorms will move eastward to parts of Southern New England/Mid-Atlantic Coast into the Southeast by Tuesday evening. Along the southern half of the front, showers and thunderstorms will continue over the Central/Western Gulf Coast into Tuesday evening/Wednesday. Additionally, tropical moisture and daytime heating will aid in producing showers and thunderstorms over parts of the Southeast into the Southern Mid-Atlantic through Tuesday morning. Meanwhile, a dissipating front over the Upper Mississippi Valley will aid in producing showers and thunderstorms over parts of the region through Monday evening. A second front over the Pacific Northwest will move eastward to the Northern Plains/Upper Mississippi Valley and extend across parts of the Central High Plains into parts of the Great Basin by Tuesday evening. The boundary will aid in producing rain over parts of the Pacific Northwest through Monday evening. As the boundary moves into the Northern Plains overnight Monday, showers and thunderstorms will develop over parts of the Northern Plains that will move eastward into parts of the Upper Mississippi Valley/Central High Plains by Tuesday evening. Onshore flow over parts of the Pacific Northwest will aid in producing rain over parts of the area Monday evening into Tuesday evening. Elsewhere, check the latest advisory from the National Hurricane Center for the latest on Florence's track and intensity. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php