Warm and humid air will filter into the northern portion of the Plains, starting on Saturday, creating a rather big contrast to the cool air diving into the Northwest.
The system that has formed along this difference will result in showers and thunderstorms, some of which will be strong or severe.
Through daytime heating and rising humidity, the air will become unstable enough for thunderstorms to turn severe in the afternoon.
Senior Vice President of Accuweather Enterprise Solutions and Severe Weather Expert Mike Smith has been assessing the severe threat this weekend, looking at hail, wind and tornado potential.
Smith also mentioned that the greatest threat Saturday will be in "Kansas and Nebraska over the central and western parts of both states, excluding the Nebraska Panhandle."
With the progression of the storm eastward, the area most at risk Sunday will be eastern South Dakota and Nebraska to the Kansas and Missouri border.
There is also a risk for severe weather into Oklahoma and Texas through the weekend.
But the threat for severe weather does not end with the start of the workweek. Monday also looks to be a day of severe weather across the Plains.
Once again, the weather pattern will be potent enough for the development of severe thunderstorms that could produce hail, damaging winds and tornadoes.
When asked why this storm was expected to bring such severe weather, Smith explained how "the instability, tendency of the air to rise to form thunderstorms, is forecast to be extraordinarily high."
The unstable air combined with the low pressure is what "allows very strong storms to form," Smith said. "Mother Nature does the rest."
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A cold front will spread needed rainfall across drought-stricken parts of eastern Australia during the middle of the week.
The cold front that is expected to whisk Hurricane Maria back out to sea after it nears North Carolina will trim the summerlike warmth out of the midwestern and northeastern United States this week.
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Tropical Storm Pilar is expected to churn up rough seas and raise the risk for flooding downpours across southwestern Mexico this week.
Thousands of people have been evacuated from their homes on the Indonesian island of Bali due to fears of Mount Agung potentially erupting.
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While no new threats are lurking behind Maria and Lee this week, residents of the Caribbean and United States should not let their guard down as tropical season is far from over.