Thunderstorms are expected to rumble through the Windy City and other parts of the Midwest Friday. Some storms could be strong with gusty winds, hail and brief downpours.
In addition to Chicago, areas from Wisconsin to Missouri, including Milwaukee, St. Louis and Kansas City, are in the threat area.
The time period of concern is this afternoon and into the evening. The afternoon rush hour could become treacherous in spots across the large metro areas.
The most intense thunderstorms can bring wind gusts to 50 mph, hail and brief downpours. These downpours will reduce visibility and bring the risk for hydroplaning.
Some minor tree damage is possible in spots along with localized power outages. Localized flash flooding in low-lying and poor drainage areas is also possible.
The culprit of Friday's active weather is a cold front associated with an area of low pressure. This is the same storm storm system that brought potent thunderstorms from Wisconsin to Nebraska on Thursday.
After showers and storms clear the region, an unseasonably cool air mass will settle over the Midwest Saturday with high temperatures only reaching the 60s and 70s.
Temperatures over the weekend will average 5 to 15 degrees below normal across the Great Lakes and Midwest. Many record low temperatures could be matched or broken Saturday and Sunday.
Story by AccuWeather.com Meteorologist Mike Doll
A budding tropical disturbance has the potential to strengthen significantly and reach Florida with strong winds, coastal flooding and torrential rainfall during Sunday and Monday.
Rounds of showers and thunderstorms will bring the potential for flash flooding and localized damaging wind gusts through Thursday.
Stargazers will want to dig out their binoculars and telescopes this weekend as Venus and Jupiter shine so close that they appear as one large, bright star in the evening sky.
Friday will be largely dry across the United Kingdom, but the threat for rain will increase over the bank holiday weekend.
One final surge of heat will encompass much of England and Wales from Tuesday through Thursday.
The remains of Typhoon Holly brought heavy rains and flooding to south-central Alaska with heavy snow inland. (4-foot drifts at Denali National Park).
Hampton Roads, VA (1990)
Very heavy rain fell during the morning, causing widespread flooding. There was also 7.33 inches of rain at Virginia Beach. Between 4 and 5 inches of rain fell at Hampton Roads.
Cloudburst at Guinea, VA - 9.25 inches of rain in only 40 minutes.