Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 338 AM EDT Sun Aug 12 2018 Valid 12Z Sun Aug 12 2018 - 12Z Tue Aug 14 2018 ...Heavy rain possible over parts of the Southern Plains... ...Temperatures will be 10 to 20 degrees above average over parts of the Northern High Plains... A quasi-stationary front extending from the Mid-Atlantic into the Southeast and along the Gulf Coast will aid in producing showers and thunderstorms along the Northeast/Mid-Atlantic Coast into parts of the Southeast westward to the Central Gulf Coast through Monday evening. In addition, an upper-level low over the Great Lakes/Ohio Valley and the Northern/Central Appalachians will also aid in producing showers and thunderstorms over the Lower Great Lakes/Ohio Valley into the Northern/Central Appalachians through Tuesday. Meanwhile, a second upper-level low over the Southern High Plains will be quasi-stationary through Tuesday. The energy will aid in producing showers and thunderstorms over parts of the Southern Plains into parts of the Lower Mississippi Valley through Tuesday, too. On Monday, the showers and thunderstorms will expand into parts of the Central Plains/Middle Mississippi Valley. Additionally, a front extending from the Northern High Plains southwestward into the Great Basin will move eastward to the Upper Mississippi Valley/Northern Plains into parts of the Central Rockies/Great Basin by Monday evening. Showers and thunderstorms will begin to develop along and ahead of the boundary on Sunday evening over parts of the Northern High Plains into parts of the Great Basin. The showers and thunderstorms will continue over parts of the Northern High Plains/Northern Rockies through Monday evening. Furthermore, weak monsoonal moisture and daytime heating will aid in producing showers and thunderstorms over parts of the Southwest/Great Basin and parts of the Central/Southern Rockies on Sunday and Monday late afternoon into late evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php