Mainly Dry

General Overview: ACTIVE WEATHER PATTERN ACROSS THE NATION WITH HEAVY RAIN AND FLASH FLOODING POTENTIAL IN THE NORTHERN PLAINS, WHILE RAIN AND THUNDERSTORMS AFFECT PORTIONS OF THE CENTRAL PLAINS, MIDWEST, AND EAST COAST. MULTIPLE FRONTAL SYSTEMS WILL MOVE ACROSS THE COUNTRY THROUGH MIDWEEK, BRINGING PRECIPITATION CHANCES TO MANY REGIONS.

 EAST:  
A low pressure system off the Atlantic coast will bring rain and thunderstorm activity to coastal areas of the Northeast and Mid-Atlantic through Sunday. As this system moves offshore, high pressure builds in briefly before another frontal system approaches by Monday. Rain and thunderstorms will develop along the East Coast, particularly from the Carolinas northward. By Tuesday into Wednesday, precipitation will spread across more of the coastal regions with a low pressure system developing near the Mid-Atlantic. 

The coastal areas will experience periods of rain and thunderstorms through midweek, with the heaviest precipitation likely along the immediate coastline. Interior portions of the Northeast and Mid-Atlantic will see more scattered precipitation. By late week, conditions should gradually improve as high pressure builds in from the north.

Temperature Anomalies:

-Days 1-4: Near normal to slightly above normal temperatures for most of the region, with coastal areas seeing temperatures 1-3°F above normal.

-Days 5-8: Warming trend with temperatures 2-4°F above normal for much of the Northeast and Mid-Atlantic, particularly across Pennsylvania, New York, and New England.

-Days 9-10: Return to near normal temperatures with minimal anomalies across the region.

 CENTRAL:  
The most significant weather will occur across the Northern Plains and Upper Midwest where heavy rain and potential flash flooding is possible. A strip of heavy rain and thunderstorms extends from North Dakota southward through South Dakota and into Nebraska. This area will see the greatest precipitation amounts and flooding concerns through Sunday. 

As the system evolves, rain and thunderstorms will shift eastward into Minnesota, Iowa, and Wisconsin by Monday. Multiple low pressure systems will track through the region, maintaining precipitation chances across the Central Plains and Midwest through midweek. By Wednesday, a new frontal boundary will organize across the region with thunderstorms developing along this boundary.

The pattern remains active with periods of rain and thunderstorms affecting different portions of the Central region through the forecast period. Areas from the Dakotas through Iowa and Missouri will experience the most consistent precipitation chances.

Temperature Anomalies:

-Days 1-4: Significantly above normal temperatures across the Northern Plains and Upper Midwest, with anomalies of 6-10°F above normal in Iowa, Nebraska, and the Dakotas.

-Days 5-8: Continued above normal temperatures spreading eastward into the Great Lakes region, with anomalies gradually decreasing to 3-6°F above normal.

-Days 9-10: Near normal temperatures return to most areas with only isolated pockets of slight warmth remaining.

 WEST:  
A complex weather pattern will affect the Western states with several areas of low pressure bringing precipitation chances. The Pacific Northwest will see periods of rain, while the Northern Rockies experience a mix of rain and thunderstorms. High pressure systems over the Southwest and intermountain West will keep those areas generally drier.

By Monday and Tuesday, precipitation chances increase across the Northern Rockies and portions of the Pacific Northwest. Thunderstorm activity will be most prevalent in mountainous regions. The Southwest remains largely dry through the period, though isolated thunderstorms are possible in parts of Arizona and New Mexico.

As the week progresses, a cold front will sweep through the Northern Rockies and Pacific Northwest, bringing another round of precipitation by Wednesday and Thursday. This front will gradually push southeastward, increasing thunderstorm chances across portions of the Great Basin.

Temperature Anomalies:

-Days 1-4: Slightly above normal temperatures for much of the region, with the cool anomalies (3-5°F above normal) in the Pacific Northwest and Northern Rockies.

-Days 5-8: Continued mild conditions with temperatures 2-4°F above normal across much of the West, particularly in the Pacific Northwest and Northern Rockies.

-Days 9-10: Near normal temperatures return to most areas with only isolated areas of slight warmth remaining in the Pacific Northwest.

TROPICAL:
Atlantic: Eastern and Central Tropical Atlantic – A tropical wave located near the west coast of Africa is producing disorganized showers and thunderstorms over the far eastern Atlantic. Environmental conditions appear conducive for some gradual development of this system over the next several days. A tropical depression could form by the middle to latter part of next week while it moves westward to west-northwestward over the eastern and central tropical Atlantic. Tropical formation chance through 48 hours is low near 0 percent and formation chance through 7 days is medium at 60 percent.