Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 416 PM EDT Thu Aug 24 2017 Valid 00Z Fri Aug 25 2017 - 00Z Sun Aug 27 2017 ...Hurricane Harvey continue to strengthen while bringing extremely heavy rain over the Western Gulf Coast... ...Heavy rain possible over South Florida and parts of the Upper Mississippi Valley... The National Hurricane Center is forecasting Hurricane Harvey to move northwestward over the Western Gulf of Mexico moving into the Western Gulf Coast overnight Friday. The storm will produce showers and thunderstorms over parts of the Western Gulf Coast overnight Thursday. Extremely heavy rain will develop over parts of the Western Gulf Coast Friday into Saturday. Additionally, upper-level energy near Southern Florida will aid in producing showers and thunderstorms over the region through Saturday. In addition, a stationary front extending from the Southeast westward across the Gulf Coast State that will linger north of Harvey through Saturday. Showers and thunderstorms will develop along and near the boundary over the Western Gulf Coast/Southern Plains eastward to the Southeast also through Saturday. Meanwhile, a front over the Northern High Plains/Northern Rockies into parts of the Great Basin that will be quasi-stationary through Saturday. A warm front will develop over parts of the Northern Plains into parts of the Middle Mississippi Valley Friday into Saturday. The system will produce showers and thunderstorms over parts of the Upper Mississippi Valley into parts of the Northern/Central Plains into parts of the Northern Rockies/Northern High Plains that will expand into parts of the Upper Great Lakes by Saturday. Elsewhere, monsoonal moisture and daytime heating will aid in producing showers and thunderstorms over parts of the Southwest/Great Basin into parts of the Central/Southern Rockies on Thursday and Friday late afternoon into late evening. Furthermore, upper-level energy over parts of the Great Lakes/Ohio Valley will produce showers over parts of the Ohio Valley/Great Lakes to parts of the Northeast through Friday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php