Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 AM EDT Thu Aug 01 2019 Valid 12Z Thu Aug 01 2019 - 12Z Sat Aug 03 2019 ...Heavy rainfall and a flash flooding threat will continue over the next few days across eastern portions of the Central to Southern Plains... ...Monsoonal moisture to bring additional showers and thunderstorms across the Southwest, Great Basin, Southern to Central Rockies... ...Widespread scattered showers and thunderstorm will stretch from the Gulf Coast into the Mid-Atlantic in the vicinity of a stationary front... ...Increasing tropical moisture will bring a heavy rain threat across much of the Florida peninsula... A northwest to southeast oriented frontal boundary is expected to be the focus for heavy rainfall and flash flooding over the next 2 days across portions southeast Nebraska, eastern Kansas, eastern Oklahoma, western Missouri and northwest Arkansas. This front is not expected to move much over the next two days with repeat rounds of thunderstorm activity moving from northwest to southeast across these areas. In regions that receive the heavy rains, high temperature are expected to be 10 to 15 degrees below average. The persistent upper level ridge centered over the Southern Rockies/Southern High Plains region will continue to transport above average levels of monsoonal moisture from the Southwest into portions of the Great Basin/Southern to Central Rockies region. This will support additional scattered showers and thunderstorms across these regions with locally heavy rains and an isolated flash flooding. A frontal boundary is expected to remain stationary from the Lower Mississippi Valley into the Southern Appalachians and Mid-Atlantic. This front will remain a focus for scattered showers and thunderstorms with locally heavy rains and isolated flash flooding. A developing upper level trof over the eastern Gulf of Mexico will be transporting tropical moisture across much of the Florida peninsula for the end of the work week. Shower and thunderstorms will become frequent across much of the Florida peninsula with locally heavy rainfall likely. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php