Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 226 PM EST Mon Jan 07 2019 Valid 00Z Tue Jan 08 2019 - 00Z Thu Jan 10 2019 ...Wintry precipitation expected the next several days from the Great Lakes to the Northeast... ...Colder air will arrive over the Northern Plains and Great Lakes Tuesday, bringing an end to the much above average temperatures... ...The next round of heavy precipitation expected to impact the West Coast by Tuesday... Several lows will move from the Great Lakes into the northeast over the next few days, delivering precipitation region-wide. The first low will move from Wisconsin into western Quebec overnight, spreading precipitation eastward into the Northeast. A secondary low will arrive in the Great Lakes Tuesday morning, quickly move east, and then strengthen along the Northeast coast Tuesday Night and Wednesday. The passage of the two lows should cause temperatures to fluctuate from the Great Lakes into the Northeast, which may cause multiple changes in precipitation types in some areas. Much colder air should arrive behind the second low on Tuesday Night and Wednesday, leading to a final changeover to snow across much of the interior Northeast and lake effect snow in the Great Lakes. Significant snow accumulation is expected from Upstate New York into Vermont, New Hampshire and inland Maine, with over 8 inches of snow likely. Temperatures tonight will be 20 to 30 degrees above normal from the Northern Plains into the Great Lakes and Ohio Valley. However, colder air will begin to arrive Tuesday with the second low pressure system, and by Wednesday morning sub-zero wind chills are likely from the Dakotas into Minnesota and Wisconsin. Temperatures will also begin to cool across the rest of the Midwest, Ohio Valley and Northeast from Tuesday Night into Wednesday. On the West Coast, the next round of precipitation is likely to arrive early Tuesday as a deep low pressure system moves slowly across the northeast Pacific. Locally heavy rainfall is possible in the lower elevations of northern California and the Pacific Northwest, with accumulating snow at the highest elevations of the Cascades and Sierra Nevada ranges. This is expected to be a warm system overall, and snow levels will increase substantially overnight into Tuesday -- likely above 6000 feet everywhere except the Washington Cascades. Some freezing rain will also be possible in the Columbia Basin of Washington and Oregon. Lamers Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php