Rain and Snow

General Overview: SIGNIFICANT WINTER WEATHER IMPACTS EXPECTED ACROSS THE GREAT LAKES AND NORTHEAST WITH HEAVY SNOW AND POSSIBLE FREEZING RAIN, WHILE RAIN AND THUNDERSTORMS AFFECT THE GULF COAST REGION. BELOW NORMAL TEMPERATURES WILL DOMINATE THE CENTRAL U.S. THROUGH THE PERIOD.

EAST: A complex weather pattern will affect the eastern United States over the next several days. Initially, mixed precipitation will spread across the Great Lakes region and into the Northeast, with areas of heavy snow possible across Michigan and portions of the interior Northeast. A new system will progress into the Eastern US, bringing a mix of precipitation to the region late Monday and through Tuesday. Rain will be the primary precipitation type along the immediate East Coast and Southeast, with some thunderstorm activity possible along the coastal Carolinas. Snow will be forecast across the Northeast, with areas of rain and snow expected across the Mid-Atlantic, with some freezing rain possible as well. A drier period could return to the East by the middle of next week as high-pressure sets up behind the departing low.

Temperature Anomalies:

-Days 1-3: Below normal temperatures will dominate the Northeast and Mid-Atlantic, with departures of 3-6 degrees below normal. The coldest air will remain across the Great Lakes region with anomalies approaching 8-10 degrees below normal.

-Days 4-6: Continued below normal temperatures across most of the region, though moderating slightly. The coldest anomalies will shift toward New England and northern New York.

-Days 7-10: Temperatures trend closer to normal across most of the East, with lingering below normal readings in the Northeast and near normal conditions developing in the Southeast.

CENTRAL: The strong low-pressure system will shift eastward today. A new low-pressure system will build east across the plains on Monday with snow expected across northern and central areas and rain further south. High pressure will build into the region by midweek, bringing drier conditions, although a few periods of light snow will be possible for the Northern Plains and Upper Midwest. Guidance suggests that a new area of low-pressure could bring returning rain chances across the southern plains, with snow returning to the Central Plains and portions of the Midwest Thursday and into Friday.

Temperature Anomalies:

-Days 1-3: Significantly below normal temperatures across the Northern and Central Plains into the Midwest, with anomalies of 6-12 degrees below normal. The coldest air will be centered over Nebraska, Iowa, and the Dakotas.

-Days 4-6: Below normal temperatures persist across much of the region, though gradually moderating. The core of the coldest air shifts slightly eastward into the Midwest.

-Days 7-10: Temperatures begin to moderate but remain generally below normal across the Central Plains and Midwest, with near normal readings returning to the Southern Plains.

WEST: Multiple low pressure systems will affect the Western states through the period. Today, a new system will bring precipitation to the Southwest, particularly Colorado, Utah, and New Mexico. The Pacific Northwest will see another round of precipitation late Monday and Tuesday, with rain along the coast and snow in the mountains. Precipitation will shift into the interior West through the middle of the week. Southern California and the Desert Southwest will remain largely dry throughout the period, though some precipitation may clip the region by midweek.

Temperature Anomalies:

-Days 1-3: Near to slightly below normal temperatures across the Pacific Northwest and Northern Rockies. Above normal temperatures across the Southwest, particularly in southern Arizona and New Mexico.

-Days 4-6: Warming trend begins across the Northwest, with above normal temperatures developing in the Pacific Northwest and Northern Rockies. Southwest continues with above normal readings.

-Days 7-10: Above normal temperatures expand across most of the West, particularly in the Pacific Northwest, Great Basin, and Northern Rockies, with anomalies of 3-6 degrees above normal.

TROPICAL:
No tropical cyclone activity is expected during the next 7 days in either the Atlantic or Eastern Pacific basins.