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The large-scale weather pattern around the U.S. will remain static this weekend, leading to repeated rounds of storms for some and dry weather for others.
Saturday
The weekend will kick off with showers and thunderstorms rolling across the northern Rockies and Great Lakes. These storms may produce heavy rainfall, but the risk of flash flooding will be relatively low.
By the late morning hours, thunderstorms will erupt across the Intermountain West and Rocky Mountains, producing heavy rainfall as they move north. Flash flooding may result from these storms, particularly in Arizona, Utah and western Wyoming. If you encounter a flooded roadway, remember: “Turn Around, Don’t Drown!”
Showers and thunderstorms will continue to push across the Great Lakes and Upper Midwest throughout the afternoon hours thanks to a slow-moving low-pressure system moving through the region. These storms will bring heavy rain and gusty winds, and flash flooding is also possible.
Thunderstorms will also be common along the Gulf Coast and into portions of the interior Southeast as a result of a stalled cold front. Torrential downpours, gusty winds, and frequent lightning will accompany these storms as well as a low-end flash flooding risk.
Saturday will be generally dry for the Northeast, Mid-Atlantic, Lower Midwest, central Plains and northern Plains.
Highs on Saturday will be quite mild for much of the nation, especially for the central Plains which will be right underneath a large area of high pressure all weekend.
Highs will be in the 70s and 80s for the Pacific Northwest, Midwest, Great Lakes, Northeast and Mid-Atlantic, with 80s and 90s for the Intermountain West, Rocky Mountains, northern and southern Plains, Lower Mississippi Valley and Southeast. Temperatures will reach the 90s and 100s for the West, Desert Southwest and central Plains.
Sunday
Sunday will begin with showers and thunderstorms moving from the Great Lakes into the Midwest, with some showers also possible in the northern Plains.
Thunderstorms will once again develop across the Rocky Mountains and Intermountain West during the late morning and early afternoon hours, with an associated flash flood threat centered in northwestern Arizona. Small hail, gusty winds, and frequent lightning will also come with these storms. A few of these storms will also make their way onto the northern Plains.
Showers and isolated thunderstorms will also move across the Mid-Atlantic and Northeast as a low-pressure system continues to move eastward, and these could produce brief heavy rainfall and gusty winds. Severe weather and flooding are not expected.
A few thunderstorms are expected to develop in northern Nebraska and move east, with some storms also possible in Iowa and Missouri.
The Gulf Coast and Southeast will also receive another round of thunderstorms during the afternoon hours as a cold front continues to stall over the region. Gusty winds and brief torrential rainfall will come with these storms, with a low-end flood risk under the slowest moving thunderstorms.
The central Plains, southern Plains and West Coast will remain largely dry.
Sunday will feature similar temperatures to Saturday for many regions. Highs will be in the 70s and 80s for the Upper Mississippi Valley, Midwest, Great Lakes, Northeast and Mid-Atlantic, with 80s and 90s for the Northwest, Intermountain West, northern Plains, Lower Mississippi Valley and Southeast. Nineties and 100s can be expected for the West, Desert Southwest, central Plains and southern Plains.