Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 437 AM EDT Sun Jun 14 2015 Valid 12Z Sun Jun 14 2015 - 12Z Tue Jun 16 2015 ...Severe weather is possible for the Ohio Valley into the Mid-Atlantic, as well as portions of the Northern Plains... ...Heavy and potentially excessive rainfall continues from the southern Plains to the Northeast... Strong high pressure will remain anchored over the Southeastern states this period allowing for the transport of very moist and unstable air up from the Gulf of Mexico along the western edge of the high. This will continue to fuel widespread showers and thunderstorms from the southern Plains to the Mid-Atlantic and Northeast through the weekend and into the early part of the workweek. A frontal boundary dropping in across the central Plains on Sunday and Monday should allow for the development of more organized activity ahead of the front across the southern Plains, Middle Mississippi Valley, and into the Ohio Valley where heavy rainfall could lead to flash flooding, as highlighted by the WPC excessive rainfall graphics. Also watching a low pressure system developing in the Western Gulf of Mexico which could bring more heavy, and possibly excessive, rainfall to portions of the Western Gulf Coast by Monday. Additional information regarding the development of this potential tropical system can be found on the National Hurricane Center website. Additionally, showers and strong to severe thunderstorms may also develop along the northern portion of the above mentioned front on Sunday across portions of the northern Plains and upper Mississippi Valley. At the same time, a second boundary across the lower Great Lakes into the Northeast should push slowly north and eastward Sunday and Monday. Showers and thunderstorms along and south of the boundary may have the potential to bring heavy rainfall, flash flooding, and severe weather to portions of the Ohio Valley and Mid-Atlantic regions as well. Please refer to the WPC excessive rainfall graphics and the Storm Prediction Center for more information regarding the flash flood and severe weather threats. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php