Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 150 PM EDT Wed Jun 14 2017 Valid 00Z Thu Jun 15 2017 - 00Z Sat Jun 17 2017 ...Severe thunderstorms and heavy rain possible for portions of the Plains and the Midwest... ...Cooler temperatures expected for the Mid-Atlantic and Northeast over the next couple days while the central U.S. remains above average... Scattered showers and thunderstorms are forecast for much of the northern/central U.S. as an advancing front lifts through the Upper Midwest. Strong to severe thunderstorms are possible for some areas of the Midwest, along with heavy rainfall. Please refer to products issued by the SPC for further details on the severe weather threat. The southern portion of the trailing frontal boundary will stall over the central/southern Plains and will provide a focus for isolated to scattered thunderstorms on today and Thursday. Some thunderstorms could become severe across the southern High Plains through tonight. As the northern portions of the system moves east, showers and thunderstorms are expected to increase in coverage across portions of the lower Great Lakes, Ohio and Tennessee valleys, and the Mid-Atlantic on Thursday. Some severe storms will once again be possible, especially across portions of the southern/central plains and the Tennessee valley. Most locations across the western U.S. will remain dry until a Pacific low pressure system approaches the Northwest tonight into Thursday, spreading rain showers inland. The front will begin to weaken on Friday, with showers and a few thunderstorms gradually decreasing in coverage Friday afternoon. The hot temperatures observed along the East Coast in recent days will continue to ease as cooler air filters into the Northeast and Mid-Atlantic associated with a backdoor cold front. By Thursday, high temperatures for many locations in the Mid-Atlantic and Northeast will remain in the 70s. Meanwhile, above average temperatures will persist across most of the central U.S., with highs in Thursday and Friday 5 to 15 degrees above average. Portions of western Texas and Oklahoma could surpass 100 degrees by Friday. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php