US Day 3-7 Hazards Outlook NWS Weather Prediction Center College Park MD 328 PM EST Mon Jan 21 2019 Valid Thursday January 24 2019 - Monday January 28 2019 Hazards: Heavy precipitation across portions of the Northeast, Thu, Jan 24. Heavy precipitation across portions of the Mid-Atlantic and the Northeast, Mon, Jan 28. Heavy rain across portions of the Southeast and the Lower Mississippi Valley, Sun-Mon, Jan 27-Jan 28. Flooding possible across portions of the Tennessee Valley. Flooding occurring or imminent across portions of the Southeast, the Southern Plains, the Lower Mississippi Valley, and the Pacific Northwest. Much below normal temperatures across the Northern/Central Plains eastward through the Midwest into the Lower Great Lakes region, Fri-Sun, Jan 25-Jan 27. Heavy precipitation across portions of the Alaska Panhandle and mainland Alaska, Thu-Sat, Jan 24-Jan 26. Periods of high winds and high significant wave heights for parts of Alaska, Fri-Mon, Jan 25-28. Detailed Summary: A low pressure system and its associated fronts will move across the Eastern Seaboard on Thursday. Rain is expected to end for the Carolinas and Mid-Atlantic during the day, but precipitation could linger in the Northeast through Thursday night. There will likely be a transition between precipitation types in the Northeast with this system, and locally heavy rain and snow is possible. By the weekend and early next week, the current forecast indicates another low could track across the Gulf of Mexico and then northward along the Eastern Seaboard. This low could cause heavy rain along the central Gulf Coast states, and there is even a possibility of some snow or mixed precipitation just to the north for the Lower Mississippi Valley, Tennessee Valley, and Southeast states. Then as the low moves north, the heaviest precipitation is expected to remain offshore, but the Northeast in particular once again has a chance to see a winter weather event with transitioning precipitation types. There is still quite a bit of uncertainty with this system's development and track, so stay attuned to the forecast for updates. A cold upper-level trough and surface high pressure will help lead to much below normal temperatures by Friday and into the weekend centered on the Midwest. Minimum temperatures are currently forecast to be lower than -20 F in eastern North Dakota and northern Minnesota! The Ohio Valley and Lower Great Lakes region can expect much below average temperatures particularly Saturday morning as well. Multiple surface low pressure systems are expected to move through Alaska during the period. These lows will cause high winds and significant waves to the Aleutians and coastal areas of mainland Alaska. Additionally, heavy precipitation is forecast for coastal mainland Alaska and the Alaska panhandle. Mainland Alaska is expected to be considerably warmer than average due to upper-level ridging, but as high temperatures should remain below freezing for northern parts of the state, did not outlook an area at this time. Tate