Pictures Early Summer Thunderstorms May 9, 2011 / 7:17 AM CDT / CBS News (credit: Jessica Liefert) May Thunderstorm (credit: Jessica Liefert) May Thunderstorm (credit: Douglas Sandstad) May Thunderstorm (credit: Hank Stubanski) May Thunderstorm (credit: Dick) May Thunderstorms (credit: Paul Uhren) May Thunderstorms (credit: Paul Uhren) May Thunderstorms (credit: Heidi Zerwas) May Thunderstorms (credit: Manda Baldwin)