Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 316 AM EST Tue Jan 16 2024 Valid 12Z Tue Jan 16 2024 - 12Z Thu Jan 18 2024 ...Snow continues across the Mid Atlantic and Northeast... ...Additional freezing rain and elevation snowfall expected over the Pacific Northwest... ...Brief reprieve from the brutal cold after this morning; another Arctic blast expected late this week... Once again winter weather headlines dominate much of the weather story across the Lower 48, with concurrent areas of wintry precipitation along both coastlines and frigid Arctic air sandwiched over the Central and Southern U.S. After producing widespread snow, sleet, and freezing rain over the Mid-Deep South the last 24 hours, a quick moving upper-trough and associated coastal-low pressure area continues to spread moderate to heavy snowfall into the Mid-Atlantic this morning. Widespread Winter Weather Advisories blanket the Mid-Atlantic into New England, where minor to locally moderate winter weather impacts are possible today where an additional 2-4" can be expected through New York state. As the coastal low deepens this afternoon, moderate to heavy snowfall is expected in upper New England leading to 6-8 inches through tomorrow. Meanwhile, heavy lake-effect snowfall may briefly subside today, before renewing late this week with Winter Storm Watches hoisted downwind of Lake Erie and Ontario in New York. Over the Pacific Northwest, offshore low pressure interacting with the stubborn cold Arctic airmass entrenched atop the region will lead to yet another episode of significant freezing rain beginning this morning, which includes the Portland metropolitan area. Ice Storm Warnings are in effect through tomorrow morning as one quarter to a half inch of ice is expected. Portions of the Cascades into the Northern Rockies will also see significant impacts from this storm in the form of snow, with 15-28 inches possible. One more day of record breaking cold temperatures can be expected across much of the Rockies, Great Plains, and Midwest today with wind chills below minus 30 extending into the mid-Mississippi Valley this morning. Fortunately, a brief reprieve from the frigid air is expected as the airmass moderates beginning Wednesday, leading to below average (but not brutally cold temperatures) in its wake. Unfortunately, the break will not last long as another surge of Arctic air reaches the Plains states and Deep South by Thursday-Friday. Stay tuned as the forecast continues to evolve with this upcoming surge of cold air. Asherman Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php