Drier for most with Rain in the PNW.

General Overview: ACTIVE WEATHER PATTERN ACROSS PORTIONS OF THE WEST AND CENTRAL U.S. WITH SOME ACTIVITY PUSHING INTO THE GREAT LAKES AND NORTHEAST INTO THE WEEKEND. THIS CONTINUES INTO NEXT WEEK AS WELL. A GOOD PORTION OF THE EAST REMAINS MOSTLY QUIET THROUGH THE FORECAST PERIOD. MUCH OF THE NATION WARMS AS WELL THROUGH THE NEXT FIVE TO TEN DAYS.

EAST:
A high pressure system will dominate much of the East region through the weekend, bringing generally dry conditions. However, some showers and thunderstorms could occur this weekend over the Northeast, some activity possible in the Great Lakes/Ohio Valley, and also along the Southeast coast, including Florida. High pressure again remains the mainstay for much of next week for much of the region, but could break down some mid to late week allowing for some showers and thunderstorms to infiltrate parts of the region.

Temperature Anomalies:
-Days 1-4: Near normal temperatures across most of the Eastern Seaboard, with slightly cooler than normal conditions possible in isolated areas.
-Days 5-8: Gradual warming trend with slightly above normal temperatures spreading across the Northeast and Mid-Atlantic regions, generally 3-6°F above normal.
-Days 9-10: Continued mild conditions with temperatures 3-6°F above normal across much of the region, particularly in the Northeast.

CENTRAL:
The Central United States will experience an active weather pattern with multiple low pressure systems moving through the region. Multiple frontal boundaries will cross the region, with a warm front extending eastward from the Central Plains by Saturday evening. Heavy rain and thunderstorms are forecast across the Northern and Western Plains and Upper Midwest, gradually shifting eastward through the weekend. A particularly concerning area of heavy rain and potential flash flooding is indicated over portions of the Central Plains into the weekend. More active stormy weather will remain into next week over the Central/Northern Plains and Midwest regions with some more heavy rains expected.

Temperature Anomalies:
-Days 1-4: Above normal temperatures developing across the Central Plains and Midwest, with anomalies of 4-8°F above normal, particularly in Iowa, Missouri, and surrounding states.
-Days 5-8: Continued warm conditions with the most significant positive anomalies (6-10°F above normal) focused on the Upper Midwest and Northern Plains.
-Days 9-10: Moderating temperatures with anomalies decreasing to 3-6°F above normal across most of the region.

WEST:
Multiple low pressure systems will affect the Western states, bringing periods of rain, thunderstorms, and mountain mixed precipitation. The southern Rockies will see significant precipitation, with heavy rain and possible flash flooding across New Mexico and southern Colorado. This area of concern will persist through the weekend as a low pressure center becomes established over the region. The Pacific Northwest will also experience periods of precipitation, with rain extending inland from the coast. California will see scattered precipitation chances, primarily in the northern and central portions of the state. By early next week, precipitation will become more scattered across the region as high pressure begins to build.

Temperature Anomalies:
-Days 1-4: Below normal temperatures along the immediate West Coast, particularly in California (3-6°F below normal), with above normal temperatures in the interior West and Northern Rockies.
-Days 5-8: Warming trend with most areas experiencing anomalies up to 2-6°F, with continued mild conditions in the interior West.
-Days 9-10: Generally near normal temperatures across most of the West, with slight above normal readings (2-4°F) persisting in parts of the Pacific Northwest and California.

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 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 40 percent.

Pacific: Tropical Storm Thirteen-E is near the southern Mexican coast and is expected to become a tropical storm today. This storm will remain just off the south/west Mexican coast through the weekend and will be just south and west of the Baja California peninsula late weekend and into next week as it moves west-northwest, then northwest. There are no impacts to the U.S. expected from this system.