Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 259 PM EST Mon Jan 15 2024 Valid 00Z Tue Jan 16 2024 - 00Z Thu Jan 18 2024 ...Heavy-lake-effect snow downwind from the Lower Great Lakes and heavy snow from parts of the Northern Cascades, Northern Intermountain Region into the Central Rockies... ...There is a threat of rain/freezing rain over parts of the Lower Mississippi Valley to the Northeast and Pacific Northwest... ...Heavy Rain/Freezing Rain over parts of the Pacific Northwest from Tuesday evening into Wednesday evening... ...Moderate to heavy snow from parts of the Central/Southern Appalachians to the Northeast... On Monday evening, an area of cold high pressure over the Plains and a front with multiple waves of low pressure extending from the Central Gulf Coast to the Mid-Atlantic will move off the East Coast as low pressure moves northeastward along the Northeast Coast from Tuesday into Tuesday evening. The storm will have a wintry mix that continues Monday evening across the South. Areas of sleet and freezing rain will continue to impact areas from the Lower Mississippi Valley to the Southern Appalachians Monday evening. Snow will lift northward from the Southern Appalachians and Mid-Atlantic to the Northeast from Monday evening into Tuesday. The snow will reach southern New York and New England Monday evening before shifting farther north overnight Monday into Tuesday as an area of low pressure develops and moves north along the coast. Areas of snow will continue from eastern Tennessee to the Mid-Atlantic overnight Monday. Furthermore, the storm will require a plan for hazardous travel. Therefore, plan on slippery roads and hazardous travel conditions along the storm s path. Travel could become very difficult, especially in areas impacted by heavy snow or significant ice. Moreover, dangerously cold wind chills continue, with sub-zero wind chills continuing to affect much of the Rockies, Great Plains, and Midwest into Tuesday, with wind chills below negative 30 degrees below zero continuing to extend over Central Plains and Middle Mississippi Valley. These wind chills could cause frostbite on exposed skin in a few minutes and hypothermia shortly thereafter. Avoid outside activities if possible. If you must be outside, wear appropriate clothing, dress in layers, and cover exposed skin. Keep pets indoors. Have a cold survival kit if you must travel. Further, a reinforcing cold air will move in later this week. Temperatures are expected to moderate midweek. However, a new surge of colder air will drop south over the Northern Plains and Midwest, reaching the Deep South by the end of the week. Meanwhile, a storm will move onshore over the Pacific Northwest from Tuesday into Wednesday. The system will produce rain over parts of the Pacific Northwest into Northern/Central California, with snow over higher elevations. Heavy snow will develop over the Northern Cascades and heavy rain/freezing rain over the Columbia River Basin from Tuesday evening into Wednesday evening. The combination of snow and ice may cause hazardous road conditions through this region. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php