Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 PM EDT Sat Oct 10 2015 Valid 00Z Sun Oct 11 2015 - 00Z Tue Oct 13 2015 ...Flash flooding possible this evening across the Carolinas... ...Temperatures expected to be well above average on Sunday from the plains to the Upper Midwest... An upper-level low and a surface low pressure system will bring showers and thunderstorms to portions of the Carolinas this evening. Locally heavy rainfall will be possible, which may result in flash flooding in some areas. These showers and thunderstorms should taper off overnight as the low pressure system moves farther offshore. The system is forecast to stall offshore -- and while widespread precipitation is expected to remain offshore Sunday and Monday, a few scattered showers are possible along the immediate coastline. Showers are affecting the Pacific Northwest this afternoon ahead of a fast-moving Pacific frontal system. The system will quickly move inland tonight, and showers should begin to taper off overnight across the Pacific Northwest. Showers will be possible into Sunday morning across the northern Intermountain West as the system moves inland. Rain showers may mix with snow at the highest elevations. The frontal system will move into the northern plains and Upper Midwest Sunday afternoon. By this time the system will be relatively starved for moisture, and only a few scattered showers are expected along the front Sunday afternoon/evening. Ahead of the front, very warm temperatures are expected on Sunday across the central/northern plains and Upper Midwest. Afternoon high temperatures in these areas will be 10 to 20 degrees above average. Cooler temperatures will move into these areas on Monday behind the cold front. As the front continues to quickly move eastward, it will tap into better moisture from the Gulf of Mexico by Monday afternoon, when scattered showers and thunderstorms will be possible along the front from Texas to the Lower Great Lakes. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php