Scattered heavy snow over parts of Central/Southern Rockies...There is a threat of flash flooding and severe weather that moveseastward each day from the Southern Plains to the Southeast from Thursdayto Saturday.here is a Moderate Risk of excessive rainfall over parts of theSoutheast on Friday.A front extending from the Upper Great Lakes to the Southern High Plainson Thursday evening moves eastward to the Lower Great Lakes, Mid-Atlantic,and Central Gulf Coast by Saturday evening. Moisture pooling along thefront will aid in developing showers and severe thunderstorms over partsof the Central/Southern Plains and Middle Mississippi Valley. Therefore,the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms overparts of the Southern Plains through Friday morning. The hazardsassociated with these thunderstorms are frequent lightning, severethunderstorm wind gusts, hail, and a few tornadoes. Additionally, there isan increased threat of hail two inches or greater over parts of the area.Moreover, the front will create heavy rain over parts of the SouthernPlains. Therefore, the WPC has issued a Slight Risk (level 2/4) ofexcessive rainfall over parts of the Southern Plains through Fridaymorning. The associated heavy rain will create mainly localized areas offlash flooding, with urban areas, roads, and small streams the mostvulnerable.In addition, the associated upper-level energy will produce scatteredheavy snow over parts of the Central/Southern Rockies through overnightFriday. Further, the same upper-level energy will also create rain andhigher-elevation snow over parts of Central/Southern California, the GreatBasin, and the Southwest from Thursday evening into Friday evening. On Friday, as the system moves eastward, showers and thunderstorms willexpand into the Ohio, Middle/Lower Mississippi, and Tennessee Valleys,along with the Southeast and Central/Southern Appalachians. The threat ofexcessive rainfall increases over parts of the Southeast. Therefore, theWPC has issued a Moderate Risk (level 3/4) of excessive rainfall over theSoutheast from Friday into Saturday morning. The associated heavy rainwill create numerous areas of flash flooding. Furthermore, many streamsmay flood, potentially affecting larger rivers.Additionally, showers and severe thunderstorms will develop over parts ofthe Southern Plains to Southeast. Therefore, the SPC has issued a SlightRisk (level 2/5) of severe thunderstorms over parts of the Southern Plainsto the Southeast from Friday into Saturday morning. The hazards associatedwith these thunderstorms are frequent lightning, severe thunderstorm windgusts, hail, and a few tornadoes. Additionally, there is an increasedthreat of hail two inches or greater over parts of the SouthernPlains/Lower Mississippi Valley.Moreover, the system will produce light to moderate snow over parts of theUpper Great Lakes on Friday, extending into the Great Lakes on Saturday.Rain will develop South of the snow in parts of the Great Lakes, mainlychanging over the snow by Saturday evening.On Saturday, the threat of excessive rainfall and severe thunderstormsmove east into the Mid-Atlantic and Southeast. Therefore, the WPC hasissued a Slight Risk (level 2/4) of excessive rainfall over parts of thesouthern mid-Atlantic on Saturday. The associated heavy rain will createmainly localized areas of flash flooding, with urban areas, roads, andsmall streams the most vulnerable.