A strengthening storm tracking toward Michigan will continue to spark violent thunderstorms before the weekend comes to a close.
Severe thunderstorms, some capable of spawning tornadoes, are already erupting across the central and southern Plains with more to follow as tonight progresses.
The risk of damaging and life-threatening storms remains high through this evening across central Texas, central and eastern Oklahoma, central and eastern Kansas, northern and western Missouri, northwestern Arkansas, southeastern Nebraska, Iowa and northwestern Illinois.
According to Severe Weather Expert Henry Margusity, "The potential from the storms spans the complete arsenal of violent weather ranging from large hail and flash flooding to damaging straight-line wind gusts and tornadoes."
One severe thunderstorm from earlier today downed power lines and a store's sign in Altus, Okla.
Cities that could be hit by violent thunderstorms into this evening include Omaha, Des Moines, Rockford, Kansas City, Joplin, Fayetteville, Tulsa, Oklahoma City, Dallas and Wichita.
College and high school football games are only a handful of the activities that could be impacted by the severe weather threat.
Late tonight, the severe weather danger will shift eastward to Chicago, St. Louis, Little Rock and Shreveport.
The risk of storms with strong wind gusts and torrential downpours will then continue into the latter part of the weekend.
Over portions of the Ohio Valley and Great Lakes, strong wind gusts, with and without thunder, are a possibility as a cool front plows eastward during Sunday. Chicago, Indianapolis, Louisville, Nashville, Cincinnati, Columbus and Detroit could experience squalls capable of knocking down tree limbs and power lines.
Farther south, locally drenching thunderstorms may affect portions of central and northeastern Texas to part of the lower Mississippi Valley Sunday.
The pattern shaping up into this weekend is a classic example of the secondary severe weather season that occurs during autumn.
A stretch of higher-than-average temperatures will continue across a large portion of the Western U.S. this week.
A dominant storm track featuring storms moving west to east across Europe will result in a stark contrast between cold air building across Scandinavia and milder air masses entrenched near the Mediterranean.
An El Nino-fueled October will feature more rainfall and storms for Southwest beginning this week.
After waves of cool air progress through the Midwest and Northeast this week, some areas will be cold enough for the first snow showers of the season by this weekend.
Tropical Storm Nora moved into to the Central Pacific Basin on Sunday, where unusually warm waters have already led to a record 13 tropical systems this hurricane season.
Denver, CO (1982)
Wet snow - 6 inches foothills; slush in city. Power lines down, as well as trees.
Early-season snows: Jay Peak 6 inches Warren 5 inches
New England (1990)
Remains of Tropical Storms Klaus and Marco brought torrential rains and flooding. Parts of Connecticut had 6 inches of rain or more. Stafford, CT, had 4.20 inches.