Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EST Mon Nov 23 2020 Valid 00Z Tue Nov 24 2020 - 00Z Thu Nov 26 2020 ...A low pressure system will bring snow across the central Rockies and some mixed precipitation for the upper Midwest on Tuesday... ...Rain will expand eastward from the central U.S. toward the eastern U.S. for the next couple of days... ...More unsettled weather moving into the Northwest for the next couple of days.... Cold air behind a developing low pressure system exiting into the Canadian Maritimes will bring colder than normal temperatures along the East Coast into Tuesday night. Some snow showers are expected to linger in the lee of the lower Great Lakes through tonight into Tuesday morning. A low pressure system complex is forecast to develop over the central Plains and then head toward the Great Lakes. Snow is expected to continue over the central Rockies into Tuesday before the system moves out into the central Plains Tuesday night. Some mixed precipitation can also be expected over the upper Midwest. Meanwhile, rain will develop and expand across the Midwest while some thunderstorms are likely farther south into the southern Plains. By Tuesday night into Wednesday, the rain will be pushing eastward into the Ohio Valley with thunderstorms likely across the mid and lower Mississippi Valley ahead of a cold front. As the center of the low pressure system nears the Great Lakes Wednesday evening, some snow is forecast to develop over interior New England well ahead of the system. In the meantime, another energetic front moving into the Pacific Northwest will bring another round of mountain snow and coastal rain into the region on Tuesday. The snow will spread into the northern Intermountain region and the northern Rockies on Wednesday as the weakening front moves across. Drivers are advised to use caution as the snow could make driving conditions hazardous. Colder air will filter across much of the western U.S. on Wednesday behind the cold front. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php