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Weekend Weather Preview
August 21, 2025 at 03:33 PM EDT
By WeatherBug's Luke Barrette
This weekend will feature the first clash of seasons in the Central and Eastern U.S. as a cold front comes down from Canada.
Saturday
A weak upper-level system will be spinning away in the Southeast U.S. Scattered showers and storms will be common for the Southeast, southern Ohio Valley, and southern Appalachians. Flash flooding will be a concern to watch as some storms may be slow-moving.
A cold front will advance southeastward from the northern Plains and into the central Plains and Midwest. A drop in humidity and temperature will be realized as this front passes overhead and Canadian air moves in. There may be a few storms that fire off the cold front in Colorado, Nebraska, and Kansas. Damaging winds would be the main threat.
A variety of showers and storms will be possible pushing across the central Great Lakes. Light rainfall accumulation is possible.
To the north, a low-pressure system will gain strength in central Canada and send some rain down into the states. A few showers from this system are likely in North Dakota and Minnesota.
The Northeast will see comfortable summer temperatures in place with no threat of rain.
Another hot and humid day will allow for sea-breeze storms along the Gulf Coast. A couple of strong wind gusts and localized urban flooding will be threats that cannot be ruled out.
To the west, the Four Corners and Great Basin will see storms pop up in the high terrain and lower terrain. The Pacific Northwest, northern Rockies, and West Coast will remain in a dry regime.
Sixties will be found in the Rockies, central Sierra Nevada, and Upper Midwest. Highs in the 70s are likely in the northern to central Plains, and southern Appalachians. The Northeast, Mid-Atlantic, Southeast, Ohio Valley, Lower Midwest, and along the Gulf Coast will see 80s. Nineties are in store for the Mid-South, southern Plains, Four Corners, Pacific Northwest, and central to northern Great Basin. Interior California and the Desert Southwest will be hot with 100s and 110s.
Sunday
The cold front moving across the Central U.S. will be the focus for impactful weather on Sunday. As it lowers temperatures and humidity values for those that it has passed, to the south and east of it will see thunderstorms. The spine of the Appalachians in the Mid-Atlantic and Northeast will be where showers and storms will occur. Damaging wind gusts will be the main thunderstorm threat with light to moderate rainfall accumulations expected.
Heavy rain will soak the southern Atlantic coastlines in the Carolinas and Georgia. Rainfall totals will be in the 1-to-2-inch range.
Bouts of stormy and wet weather will exist east of the Front Range and into the central Plains. Damaging winds may be a considerable threat for these storms.
To the west, monsoon moisture continues to bring showers and storms to the Four Corners, and Great Basin. The Sierra Nevada might get into this action as well with what would be much needed rain.
An upper-level disturbance will spin around just north of Lake Superior and bring ample showers to Minnesota, Wisconsin, and Michigan. Light rainfall accumulations are expected.
A slug of sweaty moisture will provide heavy rain for far-southern Texas. Rainfall will generally be around the 1-inch mark.
The western northern Plains, northern Rockies, Pacific Northwest, and West Coast will be dry.
Highs in the 50s and 60s will be found in the high terrain of the Rockies, northern Plains, as well as the rain-soaked Upper Midwest. Seventies will be common for the Great Lakes, Ohio Valley, Northeast, West Coast, Lower Midwest, and in the high terrain of the Appalachians. The Mid-Atlantic, Southeast, and central Plains will see 80s. A sharp gradient between 80s and 90s will occur in the southern Plains and Mid-South. Nineties will be felt in the Pacific Northwest, Four Corners, and Great Basin. Triple digits will torch the Desert Southwest and interior California.
Saturday
A weak upper-level system will be spinning away in the Southeast U.S. Scattered showers and storms will be common for the Southeast, southern Ohio Valley, and southern Appalachians. Flash flooding will be a concern to watch as some storms may be slow-moving.
A cold front will advance southeastward from the northern Plains and into the central Plains and Midwest. A drop in humidity and temperature will be realized as this front passes overhead and Canadian air moves in. There may be a few storms that fire off the cold front in Colorado, Nebraska, and Kansas. Damaging winds would be the main threat.
A variety of showers and storms will be possible pushing across the central Great Lakes. Light rainfall accumulation is possible.
To the north, a low-pressure system will gain strength in central Canada and send some rain down into the states. A few showers from this system are likely in North Dakota and Minnesota.
The Northeast will see comfortable summer temperatures in place with no threat of rain.
Another hot and humid day will allow for sea-breeze storms along the Gulf Coast. A couple of strong wind gusts and localized urban flooding will be threats that cannot be ruled out.
To the west, the Four Corners and Great Basin will see storms pop up in the high terrain and lower terrain. The Pacific Northwest, northern Rockies, and West Coast will remain in a dry regime.
Sixties will be found in the Rockies, central Sierra Nevada, and Upper Midwest. Highs in the 70s are likely in the northern to central Plains, and southern Appalachians. The Northeast, Mid-Atlantic, Southeast, Ohio Valley, Lower Midwest, and along the Gulf Coast will see 80s. Nineties are in store for the Mid-South, southern Plains, Four Corners, Pacific Northwest, and central to northern Great Basin. Interior California and the Desert Southwest will be hot with 100s and 110s.
Sunday
The cold front moving across the Central U.S. will be the focus for impactful weather on Sunday. As it lowers temperatures and humidity values for those that it has passed, to the south and east of it will see thunderstorms. The spine of the Appalachians in the Mid-Atlantic and Northeast will be where showers and storms will occur. Damaging wind gusts will be the main thunderstorm threat with light to moderate rainfall accumulations expected.
Heavy rain will soak the southern Atlantic coastlines in the Carolinas and Georgia. Rainfall totals will be in the 1-to-2-inch range.
Bouts of stormy and wet weather will exist east of the Front Range and into the central Plains. Damaging winds may be a considerable threat for these storms.
To the west, monsoon moisture continues to bring showers and storms to the Four Corners, and Great Basin. The Sierra Nevada might get into this action as well with what would be much needed rain.
An upper-level disturbance will spin around just north of Lake Superior and bring ample showers to Minnesota, Wisconsin, and Michigan. Light rainfall accumulations are expected.
A slug of sweaty moisture will provide heavy rain for far-southern Texas. Rainfall will generally be around the 1-inch mark.
The western northern Plains, northern Rockies, Pacific Northwest, and West Coast will be dry.
Highs in the 50s and 60s will be found in the high terrain of the Rockies, northern Plains, as well as the rain-soaked Upper Midwest. Seventies will be common for the Great Lakes, Ohio Valley, Northeast, West Coast, Lower Midwest, and in the high terrain of the Appalachians. The Mid-Atlantic, Southeast, and central Plains will see 80s. A sharp gradient between 80s and 90s will occur in the southern Plains and Mid-South. Nineties will be felt in the Pacific Northwest, Four Corners, and Great Basin. Triple digits will torch the Desert Southwest and interior California.