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General Overview: ACTIVE WEATHER PATTERN ACROSS THE NATION WITH HEAVY RAIN AND FLASH FLOODING POTENTIAL IN THE SOUTHWEST, MIXED PRECIPITATION ACROSS THE NORTHERN ROCKIES AND PACIFIC NORTHWEST, AND RAIN ALONG THE EASTERN SEABOARD. TEMPERATURE CONTRASTS WILL BE SIGNIFICANT WITH ABOVE NORMAL TEMPERATURES IN THE CENTRAL PLAINS AND BELOW NORMAL TEMPERATURES ACROSS THE WEST.

EAST:  A low pressure system off the Mid-Atlantic coast will bring rain to coastal areas from the Northeast through the Mid-Atlantic on Monday and Tuesday. An occluded front extending from this system will produce rain showers across portions of New England and the coastal Mid-Atlantic. By midweek, this system will move offshore, allowing for improving conditions. Another system approaches from the west by late week, bringing rain chances back to the region. The Great Lakes will see scattered rain showers early in the period as a cold front pushes through, with drier conditions expected for the latter half of the week.

Temperature Anomalies:

-Days 1-3: Near normal temperatures for most of the region with slightly above normal temperatures along the immediate coast. Interior sections will remain close to seasonal averages.

-Days 4-6: Cooling trend with below normal temperatures spreading into the Northeast and Mid-Atlantic, particularly along coastal areas. Light below normal anomalies of 2-4°F expected.

-Days 7-10: Gradual warming trend with temperatures returning to near or slightly above normal across most of the region by days 9-10.

CENTRAL:  A significant weather system will affect the Central Plains and Midwest early in the period with rain and thunderstorms. Areas of heavy rain are possible across portions of Kansas, Oklahoma, and northern Texas, with flash flooding potential in some locations. As the system progresses eastward, rain will spread into the Midwest. By midweek, a cold front will sweep through the region, bringing cooler air to the northern portions while warmer than normal conditions persist across the southern Plains. Another system develops late in the period bringing additional precipitation chances to the Central Plains and Upper Midwest.

Temperature Anomalies:

-Days 1-3: Significantly above normal temperatures across the Central Plains with anomalies of 6-10°F above normal. The warmest conditions will be centered over Oklahoma, Kansas, and parts of Nebraska.

-Days 4-6: Continued above normal temperatures for the Central Plains, with the warmest anomalies (6-12°F above normal) shifting slightly westward into eastern Colorado and western Kansas. The Upper Midwest returns to near normal.

-Days 7-10: Gradual moderation of temperatures with above normal conditions persisting but weakening across the Central Plains. By day 10, most areas return to near normal temperatures.

WEST:  An active pattern will bring multiple systems through the Western states. Mixed precipitation is expected across the Pacific Northwest and Northern Rockies, with rain at lower elevations and snow at higher elevations. The Southwest will experience periods of heavy rain with potential flash flooding, particularly in Arizona. Low pressure systems moving through the Great Basin will bring precipitation to much of the Intermountain West. California will see rain chances along the coast and northern portions of the state. By late week, precipitation will focus more on the northern tier states as systems continue to move through.

Temperature Anomalies:

-Days 1-3: Below normal temperatures across much of the West, particularly in the Pacific Northwest and Northern Rockies where anomalies of 4-8°F below normal are expected.

-Days 4-6: Continued below normal temperatures for the West Coast and Great Basin, with the coldest anomalies (6-8°F below normal) centered over California and Nevada.

-Days 7-10: Gradual moderation with below normal temperatures persisting but weakening across the Southwest and California. Near normal temperatures return to the Pacific Northwest by the end of the period.

TROPICAL:
Atlantic Basin: Organizing showers are increasing near an area of low pressure located around 900 miles west of the Cabo Verde Islands. Increasingly favorable conditions in the coming day s are likely to drive further development. There is a high chance for development in the next 48 hours at 70%, and high through the next 7 days at 80%.

Pacific Basin: A trough located roughly 200 miles S-SW of Guatemala is favored to develop later this week. Current development through 48 hours is low near 0% and medium through 7 days at 40%.