Downpours and locally severe thunderstorms over the Central states will not only foil holiday weekend activities, but will also put some lives at risk.
A few days after a chilly storm departs the Northeast, warm weather will make a strong comeback in parts of the Midwest and the East later next week.
Another plunge of chilly air will set the stage for the risk of a frost and freeze centered Michigan, Ohio, West Virginia and other nearby states this weekend.
During Sunday's race, the skies will be variably cloud with the risk of a few showers.
This holiday weekend, a rare astronomical phenomenon will occur that will not be seen again until October 2015.
Thunderstorms continue to drench San Antonio, Texas, and are producing widespread flooding.
Udall, KS (1955)
This town 25 southeast of Wichita was destroyed by a tornado; 80 people dead.
Chicago, IL (1992)
32 degrees, latest 32 or lower on record.
Morden, Manitoba (1933)
Flash flood washes away bridges, ruined crops, and killed livestock.