Cooling Continues

General Overview: ACTIVE WEATHER PATTERN DEVELOPING WITH HEAVY RAIN AND FLASH FLOODING POTENTIAL IN THE SOUTHWEST, WHILE MIXED PRECIPITATION SPREADS ACROSS THE PACIFIC NORTHWEST AND NORTHERN ROCKIES. COLD FRONT WILL PUSH THROUGH THE EASTERN STATES BRINGING BELOW NORMAL TEMPERATURES, WHILE THE WESTERN HALF OF THE COUNTRY EXPERIENCES ABOVE NORMAL TEMPERATURES THROUGH THE EXTENDED PERIOD.

EAST:
A cold front will move through the Northeast and Mid-Atlantic regions by midweek, bringing cooler air to the region. Light precipitation is possible along the frontal boundary, primarily in the form of rain near the coast and possibly mixed precipitation further inland. High pressure will build in behind the front, leading to generally quiet weather conditions for the latter part of the week. By Friday, a new frontal system will approach from the west, potentially bringing rain to portions of the Southeast. The Gulf Coast will remain under high pressure influence with generally dry conditions prevailing through midweek before moisture increases late in the period.

Temperature Anomalies:

-Days 1-3: Below normal temperatures spreading across the region, with departures of 3-6 degrees below normal, particularly in the Northeast and Mid-Atlantic. The Southeast will see near normal to slightly below normal temperatures.

-Days 4-6: Continued below normal temperatures across most of the East, with the coldest anomalies (4-8 degrees below normal) focused in the Northeast and extending south through the Appalachians. Florida will remain closer to normal.

-Days 7-10: Gradual moderation of temperatures with anomalies returning closer to normal by the end of the period, though still slightly below normal across portions of the Northeast and Mid-Atlantic.

CENTRAL:
High pressure will dominate the Central Plains initially, with a low pressure system developing in Colorado by midweek. This will create a temperature contrast across the region with cooler air to the north and east and milder conditions to the south and west. Light precipitation is possible across portions of the Midwest and Great Lakes early in the period. By late week, a developing low pressure system will bring increasing moisture to the South Central region, with rain spreading across portions of the lower Mississippi Valley. The Central Plains will remain generally dry through the period.

Temperature Anomalies:

-Days 1-3: Near to slightly below normal temperatures across the Great Lakes and Upper Midwest, with near to slightly above normal temperatures developing across the Central and Southern Plains.

-Days 4-6: Warming trend across the Central and Southern Plains with temperatures 4-8 degrees above normal, while the Upper Midwest and Great Lakes remain near to slightly below normal.

-Days 7-10: Above normal temperatures expanding across most of the Central region, with the warmest anomalies (6-10 degrees above normal) focused on the Central and Southern Plains.

WEST:
An active weather pattern will impact the Western states with multiple systems bringing precipitation. The Southwest will see significant rainfall with potential for heavy rain and flash flooding, particularly in Arizona. Mixed precipitation will spread across the Pacific Northwest and Northern Rockies, with rain at lower elevations and snow at higher elevations. High pressure over the Great Basin will gradually give way to more unsettled conditions as low pressure systems move through. By midweek, a more organized system will bring widespread precipitation to the Southwest and portions of California, with heavy rain possible in some areas. The pattern remains active through the extended period with continued chances for precipitation across much of the region.

Temperature Anomalies:

-Days 1-3: Above normal temperatures across much of the West, particularly in the Great Basin and Southwest where anomalies will be 4-8 degrees above normal.

-Days 4-6: Continued warm anomalies expanding across the Western states, with the warmest conditions (6-12 degrees above normal) focused on the Rocky Mountain states and Southwest.

-Days 7-10: Persistent above normal temperatures across the entire Western region, with anomalies of 4-8 degrees above normal widespread, and localized areas 8-12 degrees above normal in the Northern Rockies and Northern Plains.

TROPICAL:
The National Hurricane Center indicates no tropical cyclone activity is expected during the next 7 days in either the Atlantic or Eastern Pacific basins.