Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Wed Aug 07 2019 Valid 12Z Wed Aug 07 2019 - 12Z Fri Aug 09 2019 ...Severe weather and heavy rainfall possible across parts of the East and the Upper Midwest on Wednesday, and the Ohio Valley on Thursday... ...Multiple rounds of heavy rainfall and potential flash flooding expected from eastern Kansas into Missouri... ...Heat advisories in effect for parts of the south-central U.S. and the Northwest... Showers and thunderstorms along and ahead of a cold front across the Ohio Valley overnight will continue into Wednesday as the front moves into the East. Storms will have the potential to produce severe weather and heavy to excessive rainfall. Both SPC and WPC have slight risks for severe storms and flash flooding, respectively, on Wednesday across portions of the Mid-Atlantic into the Northeast. A reinforcing cold front behind this one will bring showers and storms to the Upper Midwest into the Ohio Valley through Thursday, with again, the threat for severe weather and heavy rainfall. A series of upper level disturbances interacting with a stationary surface front will result in multiple rounds of strong to severe storms and heavy rainfall from portions of the Central Plains into the middle Mississippi Valley. A complex of storms moving through this morning should dimish during the day, with a second round expected to fire Wednesday night, and again on Thursday night. Storms may target the same area each day with potential for multi-day rainfall totals of several inches from eastern Kansas to western Missouri and an elevated threat for flash flooding. Hot and humid conditions are expected through this week for parts of the south-central U.S. underneath a strong upper level ridge. Heat advisories are in place for portions of the southern and central Plains into the lower Mississippi Valley. Wednesday will be another hot day for parts of the interior Northwest where heat advisories are also in effect. A gradual cooling trend is expected west of the Rockies after Wednesday though as a system aloft slides east from the eastern Pacific. Across the Southwest, monsoonal moisture will continue to result in diurnally driven showers and storms from the Four Corners into the Rockies with locally heavy rainfall possible. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php