Rain Showers Continue

General Overview: QUIETER CONDITIONS ARE LIKELY THIS WEEKEND AND EARLY NEXT WEEK, WITH BREEZY CONDITIONS LIKELY ACROSS NORTHERN PORTIONS OF THE COUNTRY. A MORE ACTIVE PATTERN WILL SET UP MONDAY AND THROUGH THE MIDDLE OF THE WEEK ACROSS THE CENTRAL US, WITH RAIN AND STORMS PUSHING EASTWARD AS THE WEEK PROGRESSES. A BROAD COLD AIRMASS WILL DOMINATE MUCH OF THE CENTRAL AND EASTERN UNITED STATES, BRINGING WELL-BELOW-NORMAL TEMPERATURES. MEANWHILE, THE PACIFIC NORTHWEST WILL EXPERIENCE NOTABLY ABOVE-NORMAL TEMPERATURES THROUGHOUT THE ENTIRE FORECAST PERIOD.

—

EAST: The eastern United States will be the most active region over the coming days as a low pressure system tracks across north across Ontario and Quebec, bringing a complex precipitation pattern to a large swath of the Great Lakes and Northeast. Rain and thunderstorms will linger across the Southeast today as an area of low-pressure pushes eastward offshore. Areas of rain will develop across the Great Lakes and Northeast through the latter half of the weekend

By Monday, the precipitation shield expands considerably. Rain will continue to spread across the Great Lakes and into the Northeast. The cold front will sweep eastward, and thunderstorm activity fires up across portions of the Ohio Valley and mid-South ahead of the frontal passage.

Tuesday will see large swaths of rain develop from the Mid-South northeastward into the Northeast. Thunderstorms are also possible across portions of the Southeast and mid-Atlantic ahead of the front. Residents from the Great Lakes through the Northeast should be prepared for potentially hazardous travel conditions due to snow and ice accumulations.

By Wednesday, rain will continue, sweeping eastward across the Eastern US as the front advances. The threat for heavy rain will be a concern across portions of the South Central and Southeast regions as this front pushes through.

Temperature Anomalies:

-Days 1-3: Temperatures will run 6 to 12 degrees or more below normal across much of the Northeast, Great Lakes, and Ohio Valley. The coldest departures are focused over the mid-Atlantic and interior Northeast on Day 2 and Day 3, with anomalies reaching 12°F or more below normal in some locations. The Southeast also runs below normal by several degrees.

-Days 4-6: Below-normal temperatures persist across the Great Lakes and Ohio Valley, though the magnitude moderates somewhat. By Day 5 and Day 6, above-normal temperatures begin to return to portions of the mid-Atlantic and southern New England, with anomalies of 6 to 12°F above normal developing along the immediate coast.

-Days 7-10: A broad below-normal temperature regime settles across the Great Lakes, Ohio Valley, and Southeast, with anomalies of 3 to 9°F below normal. Some moderation is noted by Day 9 and Day 10 across the far Northeast.

—

CENTRAL: Generally quiet and dry weather will be seen across much of the Central US this weekend, although a few areas of rain and thunderstorms will be seen, favoring the Mid-Mississippi Valley. 

By Monday, a new area of low-pressure will develop over the Central Plains, with thunderstorm activity spreading broadly from the Central and Northern Plains eastward. Some snow could mix in for far northern areas in the Northern Plains and Upper Midwest.

Tuesday and Wednesday, a slow-moving frontal boundary will prolong rain across the Central/Southern Plains and Eastward, with thunderstorms likely. Drier weather is expected to return across the Northern Plains and Upper Midwest. 

Temperature Anomalies:

-Days 1-3: The most significant cold anomalies during Days 1-3 are centered over the South Central region, with temperatures running 9 to 15°F or more below normal across portions of the Southern Plains and Gulf Coast states. The Central Plains also runs 6 to 12°F below normal. The northern tier of the central United States is near to slightly below normal.

-Days 4-6: Cold anomalies shift northward, with the most pronounced below-normal temperatures settling over the Northern Plains and upper Midwest, where departures of 6 to 12°F below normal are expected. The South Central region moderates closer to normal, with some areas trending slightly above normal by Day 5 and Day 6.

-Days 7-10: Below-normal temperatures persist across the upper Midwest and Northern Plains through much of the Days 7-10 period, though the anomalies gradually diminish. The South Central region trends near to slightly below normal.

—

WEST: On Sunday, scattered showers and thunderstorms are noted across portions of the Southwest and Intermountain West, with some snow possible at higher elevations across the Rockies. A cold front approaching the Pacific Coast will bring the potential for precipitation to the Pacific Northwest.

By Monday, the Pacific Northwest low pressure system brings rain and thunderstorms to the region, with snow at higher elevations across the Cascades and Northern Rockies. Scattered showers and thunderstorms continue across the Southwest and Intermountain West.

Tuesday sees a more active pattern develop across the West, with a broad area of rain, mixed precipitation, and mountain snow spreading from the Pacific Northwest through the Intermountain West and into the Central Rockies. A low pressure system over the Southwest helps drive moisture northward, supporting precipitation across a large portion of the western United States.

By Wednesday, precipitation activity across the West diminishes somewhat, though isolated showers and mountain snow remain possible across the Rockies and Intermountain West. The Pacific Northwest continues to see periodic precipitation associated with onshore flow.

Temperature Anomalies:

-Days 1-3: The Pacific Northwest stands out with the most significant above-normal temperature anomalies, running 6 to 12°F or more above normal, particularly across Washington and Oregon. The remainder of the West is generally near to slightly above normal, with some below-normal pockets across California.

-Days 4-6: Above-normal temperatures across the Pacific Northwest continue and expand somewhat into the Northern Rockies and Intermountain West. The Southwest trends near to slightly below normal, while California remains near normal to slightly below normal.

-Days 7-10: The above-normal temperature signal across the Pacific Northwest, Intermountain West, and into the Central Rockies strengthens and broadens, with anomalies of 6 to 12°F above normal covering a large portion of the western United States. This warmth extends into California and the Southwest by the end of the period.

—

TROPICAL: No tropical cyclone activity is expected across either the Atlantic or Pacific basins during the next seven days.