A derecho that pushed across the Plains and Midwest Monday into Tuesday unleashed heavy rain and huge hail and sent lightning across a wide swath of the United States.
Some hailstones measured up to 4 inches in diameter, or about the size of a grapefruit.
The video below shows three lightning bolts striking Chicago towers at the same time.
Triple lightning strikes captured hitting Sears, Trump and Hancock in Chicago on Monday, June 30, 2014. (YouTube Video/Dan Robinson)
In Chicago, flooding rains and severe thunderstorms cut power to tens of thousands, closed roads and have halted air traffic at O'Hare International Airport. Lightning was seen flashing across the sky and hitting skyscrapers across the Windy City.
Chicago lightning on Monday, June 30, 2014. (Twitter Photo/Barry Butler)
There were eight tornadoes reported from Texas to Ohio. Wind reports nearly reached 300, and large hail reports fell just shy of 50.
More than 6 inches of rain was reported by NWS-trained spotter in Parnell, Iowa, in a 24-hour time span. This brought the monthly rain total to 14.45 inches.
A system with rain and thunderstorms will bring both good and bad news to the western United States later this week.
A change in the weather pattern will bring an extended period of dry and sunny conditions over much of the south-central United States.
After England and Wales endured a cool end to April and an unsettled bank holiday, the warmest air so far this year is set to arrive late this week.
SpaceX is preparing to launch another rocket into space, and as they do so, they will be monitoring the weather carefully to make sure that it does not interfere.
Residents of the southeastern United States may feel like the calendar has flipped ahead to Memorial Day with warm and muggy weather in place for the start of May.
May is picking up where April left off with record-challenging warmth surging back into the northwestern United States.
Charleston, SC (1761)
Large tornado swept Charleston harbor when British fleet of 40 sails was at anchor. Raised waves 12' high, many vessels on beam-ends, 4 killed.
May snowstorm from New York City southwest to to Pennsylvania and south into Virginia; ground covered, severe frost in North Carolina, fruit killed.
Eastern U.S. (1812)
May snowstorm swept from Philadelphia northeastward to Maine. Snow covered ground in New York City; 12" accumulated near Keene, New Hampshire, 9" fell at Waltham, Mass., near Boston.