Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Wed Sep 07 2016 Valid 00Z Thu Sep 08 2016 - 00Z Sat Sep 10 2016 ...Post-tropical cyclone Hermine is forecast to gradually dissipate near the New England coast... ...Frontal boundary expected to bring strong thunderstorms and heavy rain from the central plains to the Midwest... ...Moisture associated with Newton is expected to spread heavy rain across the Desert Southwest... After lingering off the mid-Atlantic coast through the Labor Day weekend, Post-tropical cyclone Hermine has continued to weaken to the southeast of Long Island. The remnant circulation of Hermine is forecast to gradually dissipate as it brushes southeastern New England coast with only some showers expected through Thursday morning. Thereafter, warm and moist air will begin to spread northward into much of the eastern U.S. under the influence of an upper-level ridge where afternoon high temperatures are forecast to rise well into the 90s. Moisture will gather ahead of a cold front over the northern and central Plains today where thunderstorms could become severe. The upper-level trough associated with the front will make steady progress eastward across the Great Lakes on Thursday. However, the front will become nearly stationary across the central Plains on Thursday before returning as a warm front on Friday. Another disturbance coming in from the northern Rockies is forecast to merge with the frontal boundary and should reinvigorate showers and thunderstorms over the central Plains on Friday. Heavy rain of up to a few inches could fall in the central Plains during the next couple of days. Cool air behind the disturbance will spread south and east across the northern Rockies into the northern and central Plains by Friday. High temperatures could average more than 10 degrees below normal in the northern Rockies and northern High Plains on Friday. Over the Desert Southwest, tropical storm Newton has been spreading heavy rain northward into much of Arizona today. The circulation of Newton is forecast to dissipate this evening. However, tropical moisture associated with its remnants is forecast to bring heavy downpours from eastern Arizona into western New Mexico through tonight where flash flooding and mud slides are possible. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php