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.
Temperatures will be a few degrees below average across the UK this weekend, but largely dry conditions are expected.
After no rain for almost a month, Santiago braces for rain early in the week. Cool air follows, spreading into Chile, Argentina and Uruguay mid-week.
There is a significant chance that Jimena will turn back toward Hawaii and threaten the islands during the second week of September.
An unusually strong push of cool air for early September will move southward along the Atlantic Seaboard into the Labor Day weekend before July-like heat returns by next week.
Steering winds could take Ignacio, as a remnant storm, into the southeastern arm of Alaska or British Columbia during the middle days of next week.
Strong thunderstorms will roll across the Upper Midwest while rain and strong winds roar through the Northwest this weekend.
Greatest natural disaster for Arizona. Rains in central Arizona caused rivers to rise 5-10 feet per hour, sweeping cars and buildings 30-40 feet downstream. Twenty-three lives were claimed by the floodwaters. This rain came from Tropical Storm Norma.
Los Angeles, CA (1988)
110 degrees -- all-time September record.
Washington, DC (1939)
"Once in a hundred-year rainstorm" 4.40 inches in 2 hours at the Washington Zoo.