The Plains will have more severe thunderstorms for the first part of the workweek following stormy weather over the holiday weekend.
A system ejecting out of the northern Rockies will be held responsible for these storms; continuing the threat of severe weather in the Plains for a third day in a row. As this system tracks to the east over the next several days, it will extend the severe weather threat into the Great Lakes, and eventually the Northeast.
Severe weather will resume on Monday afternoon from Montana through South Dakota, putting the cities of Great Falls, Mont., Dickinson, N.D., and Sioux Falls, S.D., all at risk.
The combination of heat building northward from the Plains and humidity pumping in from the Southeast will set the stage for dangerous storms to develop.
Torrents of rain in heavy storms can lead to localized flash flooding, while strong wind gusts and large hail can result in property damages.
Rush hour commutes can turn treacherous around major cities with storms that roll through during the late afternoon. Blinding downpours will reduce visibilities and cause water to pool on roadways, resulting in poor travel conditions for motorists.
Storms will migrate eastward heading into Monday night, moving into southern Minnesota and northern Iowa.
With the system tracking to the east, the severe weather threat on Tuesday will come to an end in Montana, North Dakota and western parts of South Dakota and Nebraska. However, new cities will be in the line of fire from these storms.
Chicago, Ill., Madison, Wis., Minneapolis, Minn. and Cedar Rapids, Iowa, will all be added to the list of cities that will likely have severe thunderstorms on Tuesday and Tuesday night.
By Wednesday, the main center of low pressure associated with the storm system will have lifted up into Quebec. A cold front extending from this low will trigger another round of severe weather on Wednesday, this time across the Northeast.
Storms will stretch from Boston to Indianapolis with New York, Philadelphia and Washington, D.C., being on the eastern fringe of the severe threat.
Story by AccuWeather.com Meteorologist Brian Lada.