Generally Cool

General Overview: SIGNIFICANT WINTER WEATHER IMPACTS EXPECTED ACROSS THE NORTHERN PLAINS AND UPPER MIDWEST WITH FREEZING RAIN AND HEAVY SNOW POSSIBLE. PACIFIC NORTHWEST FACING HEAVY RAIN AND POTENTIAL FLASH FLOODING. TEMPERATURES WILL FEATURE SHARP CONTRAST WITH WELL BELOW NORMAL CONDITIONS IN THE NORTHEAST AND WELL ABOVE NORMAL ACROSS THE WESTERN STATES.

EAST:
A high pressure system will initially bring relatively quiet weather to much of the Northeast and Mid-Atlantic early in the period. By midweek, a developing low pressure system will track into the Northeast, bringing mixed precipitation to the region. Areas from the Mid-Atlantic through New England will see rain developing, with some mixed precipitation across interior sections. The Ohio Valley and parts of the Appalachians may experience periods of freezing rain, creating hazardous travel conditions. Rain and thunderstorms are possible across portions of Florida and the Southeast coastline early in the period.

As the week progresses, colder air will filter into the region behind a cold front, potentially changing rain to snow across parts of the interior Northeast. The Mid-Atlantic states will primarily see rain, while the coastal areas remain mostly precipitation-free under high pressure by late week.

Temperature Anomalies:
-Days 1-3: Below normal temperatures across the Northeast and Mid-Atlantic, with anomalies of 6-12 degrees below average. Near normal conditions for the Southeast.
-Days 4-6: Continued below normal temperatures for the Northeast, gradually moderating. Near normal for most of the Southeast.
-Days 7-10: Temperatures trending closer to normal across most of the East, with slightly below normal conditions persisting in parts of New England.

CENTRAL:
A complex winter weather pattern will impact the Central U.S., with the most significant concerns across the Northern Plains and Upper Midwest. A developing low pressure system will bring freezing rain and mixed precipitation to portions of the Dakotas, Minnesota, and Wisconsin. This system poses a significant freezing rain threat, particularly across North Dakota and northern Minnesota, where ice accumulation could lead to power outages and dangerous travel conditions.

As the system evolves, heavy snow is possible across portions of the Northern Plains, with the potential for significant accumulations. The Central Plains will remain largely dry under high pressure, while the Mississippi Valley sees increasing moisture and precipitation chances by midweek as the frontal boundary pushes eastward.

Temperature Anomalies:
-Days 1-3: Near to slightly below normal for much of the region, with colder conditions developing across the Northern Plains.
-Days 4-6: Significant cold anomalies developing across the Northern Plains and Upper Midwest, with temperatures 8-12 degrees below normal. Near normal elsewhere.
-Days 7-10: Below normal temperatures persisting across the Northern Plains and Upper Midwest, gradually moderating by day 10.

WEST:
Active weather will continue across the Pacific Northwest and Northern Rockies, with multiple systems bringing heavy precipitation. The most significant concern is heavy rainfall across western Washington and Oregon, where flash flooding is possible. Mountain areas will see substantial snowfall, particularly across the Cascades and Northern Rockies.

High pressure will dominate the Southwest initially, bringing dry conditions to California, Nevada, and Arizona. By midweek, moisture will increase across the Pacific Northwest with another round of heavy precipitation. The Southwest will remain largely dry throughout the period.

Temperature Anomalies:
-Days 1-3: Significantly above normal temperatures across the entire Western region, with anomalies of 6-12 degrees above average, particularly in the Rockies and Intermountain West.
-Days 4-6: Continued well above normal temperatures, with the warmest anomalies (8-12 degrees above normal) focused on the Rockies and Great Basin.
-Days 7-10: Warm anomalies persisting but gradually moderating, remaining 4-8 degrees above normal across most of the West.

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