Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 PM EST Sun Nov 10 2019 Valid 00Z Mon Nov 11 2019 - 00Z Wed Nov 13 2019 ...The next surge of arctic air is poised to bring the coldest temperatures so far this season for much of the central and eastern U.S. for early in the week... The second Arctic intrusion in less than a week is now arriving across the Plains and Midwest Sunday afternoon, with a pronounced cold front quickly dropping southeastward along and east of the Rockies. This episode of cold weather is associated with a 1045 mb surface high, which is close to some monthly pressure records for November. By Monday evening, the front is expected to reach northern Mexico and the Appalachians with an abrupt drop in temperatures behind it, leading to some impressive 24-hour temperature changes on the order of 30 to 40+ degrees possible! It will feel more like the middle of January for the beginning of the week, with numerous record low temperatures likely from Texas to the Great Lakes. Snow is expected for much of Montana and the western Dakotas through Sunday evening owing to upslope flow behind the front along with a shortwave passage aloft. Winter weather advisories and some winter storm warnings are in effect, mainly for central and eastern Montana where snowfall totals in the 4 to 8 inch range could be realized by Sunday night. Snow is also expected to develop over northern New England by Monday night and early Tuesday as a surface low develops along the arctic front, and lake effect snow will increase across much of Michigan. Winter storm watches are in effect for some of these areas. Another mild day can be expected on Monday for the Southeast U.S. to southern New England before major changes ensue. Showers are likely with the passage of the front, with the heaviest rainfall over Arkansas and northern Louisiana with amounts near one inch possible. Locations west of the Rockies should be spared from this Arctic airmass, with near to above average temperatures expected from the Desert Southwest to the Pacific Northwest. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php