Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 303 AM EDT Mon Jul 14 2014 Valid 12Z Mon Jul 14 2014 - 12Z Wed Jul 16 2014 ...Summer heat still on for the Far West but cooler air continues to drop south and eastward across the central and eastern US... ...The cooler air is associated with a deep upper trough that will help trigger widespread showers and thunderstorms along the leading edge of the cooler air across parts of the Midwest and East... A deep upper trough will cross the Great Lakes over the next 1 to 3 days that will set the stage for continued active weather here at the height of the warmest time of the year. Along the East Coast...warm humid conditions will give rise to showers and thunderstorms that will become particularly intense during the late afternoon and evening. On Monday...showers and thunderstorms will be scattered by widespread from the mid Mississippi Valley eastward across the Tennessee and Ohio Valleys and into the Northeast. On Tuesday... as a cold front continues slowly eastward to the East Coast...skies will clear over the Ohio and Tennessee Valleys as cooler drier air pushes in. Meanwhile... Tuesday should be the last day for the widespread threat of heavy showers and thunderstorms along the East Coast as the cold front pushes toward the coast by late in the day. On both days, some storms will be capable of localized flash flooding and severe weather. As cooler air continues to cover more territory on Monday and Tuesday...much of the Plains states and Mississippi Valley should experience quite pleasant and comfortable weather for at least a couple days while the East sees the end of the heat and humidity on Tuesday. Over parts of the Midwest...especially upper Michigan/Wisconsin and northern Minnesota...instability showers and cool air will make both days feel more like autumn with temperatures 10 degrees or more below normal. Several record low temperatures could also be set. Out west...one more day of record high temperatures is possible across portions of the Great Basin while an upper air disturbance moves across the Pacific Northwest...continuing a threat of mostly afternoon and evening thunderstorms that could set off some local flash floods and possibly set some wildfires. This system has already cooled off the Pacific Northwest Coast and it looks like the heat will diminish over the Northern Great Basin after tomorrow. Farther south...scattered showers and thundershowers will continue across parts of the Desert Southwest and Southern and Central Rockies. Kocin Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php