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Weekend Weather Outlook

UPDATED 9 AM EDT, July 20, 2013

UPDATED By WeatherBug Meteorologist, Chad Merrill

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The weekend will bring a few big changes to the U.S., with the Northeastern heat wave breaking but a new one is getting started across the West.

WeatherBug Meteorologist Addison Green has the latest in this exclusive WeatherBug National Outlook video.

Today:

A big change in the U.S. weather pattern will finally crack the heat wave across the Midwest and Northeast.

However, it will take lines of strong-to-severe thunderstorms capable of producing damaging winds and hail to break the heat throughout the day from the Ohio Valley to New England. Before the storms arrive, highs will still reach the mid-80s. Across the Southeast and South, thunderstorms are likely throughout the day, but even with these storms, highs will still jump well into the 90s.

A few storms are jolting the northern Plains this morning. Later today, as a weak low pressure drops south across the Black Hills, storms will develop from Nebraska into southern South Dakota. Gusty winds and hail will be the main threats, with the storms dropping temperatures from around 90 degrees into the 70s. Otherwise, farther north along Interstate 94, partly sunny skies and refreshing lower 70s are on the weather menu.

The remainder of the Plains from Kansas to Texas will see bursts of sunshine mixed with a few scattered afternoon storms. Highs in the 90s will be common. Sunshine will be abundant along the West Coast with a few cooling afternoon storms from the Southwest to the southern Rockies. Temperatures will easily rise into the 80s and 90s, with the interior California deserts and southern Colorado Valley seeing triple digits.

Sunday:

More storms and a mix of hot and cooler weather will be on the weather menu across the U.S. Sunday.

Scattered thunderstorms will be the norm across the Mississippi Valley and throughout the South and Southeast Sunday. Even the southern Mid-Atlantic will see some of these storms. Despite the storms, highs will be in the upper 80s to mid-90s.

North of all of the storms will be cooler weather. The Upper Midwest, Upper Mississippi Valley, Great Lakes, and Northeast will see highs in the 70s after a cool morning in the 50s. At least the sunshine will be out to make it feel much warmer.

The western half of the U.S. from the central Plains to the Pacific will end the weekend with hot and dry weather. The exception will be in the Southwest and the mountains, where a few monsoon thunderstorms will pop-up later Sunday afternoon. Temperatures will be in the 80s and 90s, except for triple digits in the Deserts and western Great Basin, and 60s and 70s along the Pacific Coast.

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