Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 347 PM EDT Sat Aug 26 2017 Valid 00Z Sun Aug 27 2017 - 00Z Tue Aug 29 2017 ...Tropical Harvey will produce catastrophic and life-threatening rainfall and flooding across the Southeast and South Central Texas this weekend and into next week... ...Heavy rainfall possible across southwestern Florida this weekend... ...Slight risk for severe weather on through the rest of Saturday across parts of the Central Plains... As Harvey continued to move inland toward the Texas coastal plains, it has weakened to a tropical storm. It is currently forecasted to remain a tropical storm until Monday morning as it will further weaken to a tropical depression yet still hovers near the Middle Texas coast. However, despite its weakened state, Tropical Storm Harvey will still yield extremely rainfall amounts across the middle Texas coast and Southeast Texas. Through Monday, expect upwards of 20 to 25 inches of rain from Southeast Texas/Middle Texas coast and westward to the Hill Country. By Sunday afternoon and into Monday, the heavy rainfall will also begin to spread across southwestern Louisiana. Heavy rainfall is also expected to continue beyond the short term period. These rainfall totals will give way to catastrophic and life-threatening flooding and flash flooding. A high risk of flash flooding is expected through Monday at least. In addition to the devastating flash flooding risk, there will also be a risk for tornadoes through Monday as well--with the Storm Prediction Center (SPC) having a slight risk across Southeast Texas and the Middle Texas Coast. For the latest information with Harvey, please refer to the National Hurricane Center (NHC). In addition, please refer to WPC's excessive rainfall outlook for updates on areas of flash flooding risk and SPC's products for products regarding the severe weather associated with this system. Meanwhile, an area of low pressure that is off the coast of central Florida will continue to linger near this area for the rest of today and through Sunday. This low pressure is being monitored by NHC for possible development into a tropical cyclone. Regardless of development, heavy rainfall can be expected especially along the southwest coast of Florida. Because of this activity, a slight risk of flash flooding is possible. Please refer to NHC for more information in regards of development with this system. A cold front will sweep across the Upper Midwest and into the Middle Mississippi Valley over the weekend. Showers and thunderstorms will continue developing along and ahead of this boundary as it progresses south and east. A slight risk of severe thunderstorms will be possible through Sunday morning. Precipitation will spread across the Central Plains by Sunday afternoon as the cold front stretches across this region. By Monday, most of the precipitation will occur across the Upper Great Lakes, western Ohio Valley, and western Tennessee Valley. Elsewhere, typical afternoon thunderstorms will be possible across the Southern Rockies over the next few days. Overall, temperatures east of the Rockies will generally be below normal for this late in August. As an upper level ridge builds across the western U.S., expect temperatures to be above average for this half of the country through the short term period. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php