Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 313 PM EDT Sat Jun 28 2014 Valid 00Z Sun Jun 29 2014 - 00Z Tue Jul 01 2014 ...A rather intense storm for early summer is developing over North Dakota with heavy rain... ...Scattered showers and thundershowers will affect the Mississippi Valley, Midwest, Tennessee Valley, Gulf Coast and South Atlantic states...with a few locales possibly getting severe weather or flash flooding... ...A large change is expected to sweep cooler air across the Northern Rockies and Northern Plains by the start of the new week... ...A weak low off the Southeast Coast has a low to medium probability of becoming a tropical cyclone in the next 48 hours... A deepening low pressure system is bring heavy rain and gusty winds to North Dakota that is expected to drift northward into southern Manitoba overnight. Flood warnings have been posted across western North Dakota with the possibility of flash flooding across eastern North Dakota. Skies should clear on Sunday but breezy conditions will continue. A large area of scattered showers and thundershowers will be found out ahead of the advancing cold front associated with the deepening low but will also occur across much of the Mississippi Valley, Midwest, Appalachians and South Atlantic states with some locally heavy showers across parts of the Mississippi Valley and along a weak stationary boundary near the southern Appalachians. Some severe thunderstorms are possible out ahead of the cold front over the Upper Mississippi Valley southward into the eastern Central Plains and mid Mississippi Valley. By Monday...a sharp cold front will be moving eastward across the Rockies as well as the Central Plains into the Upper Mississippi Valley. Quite cool weather is expected behind the front that is likely to continue moving eastward during the first part of next week, with summer heat only in modest evidence across the Southeast and across the Desert Southwest. High pressure just off the Northeast Coast will continue to bring warm and dry weather across the Northeast but easterly flow will cause showers across parts of the Carolinas along the slopes of the Appalachians. Farther south, low pressure has developed well off the South Carolina coast and there is some potential for strengthening over the next several days. For the latest information, go to the National Hurricane Center for the latest information. Kocin Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php