Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Thu Sep 10 2020 Valid 00Z Fri Sep 11 2020 - 00Z Sun Sep 13 2020 ...Areas of heavy rain and isolated flash flooding remain possible in a tropical airmass across the Mid-Atlantic into tonight... ...Temperatures moderating over the central U.S. as showers and thunderstorms spread toward the upper Midwest... ...Fire weather conditions improving across the western U.S. The large area of well below normal temperatures covering the central portion of the country will moderate during the next couple of days, making it feel not as chilly but temperatures will remain below normal for this time of the year into the weekend. The associated upper-level trough will then lift to the northeast toward the upper Midwest. This will help develop an area of showers and thunderstorms to spread northeastward from the central High Plains toward the upper Midwest into the weekend. Parts of the central Rockies will see light snow lingering through tonight into early tomorrow morning. Meanwhile, areas of heavy rain and thunderstorms in a tropical air mass have continued to bringing episodes of locally heavy rain and flash flooding east of a stationary front across the Deep South and into the East Coast. Portions of the Mid-Atlantic have seen above average precipitation amounts over the past several weeks, making them more susceptible to flash flooding into tonight. A cool high pressure system building southward from New England will end the rain across the northern Mid-Atlantic for tomorrow (Friday). However, areas from Virginia will continue to see a good chance of thunderstorms into the weekend in the tropical airmass. In the meantime, showers and thunderstorms will move into the Great Lakes and the Ohio Valley on Saturday ahead of the aforementioned upper trough. For the western U.S. that has been plagued by wildfires, improving conditions can be expected toward the weekend as winds should remain relatively weak although cautions should not be relaxed as the air remain very dry across the interior sections such as the Great Basin. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php