Corrections:
Not Krakow, but Potsdam. I'm not sure if the "final warning" was issued on July 17th.
150,000 dead from nukes in two cities; 100,000 from firebombing in Tokyo.
Hirohito takes 6 days after Nagasaki to surrender. Looks like we might have rushed to use the bomb again to demonstrate to the U.S.S.R. who was the top dog.
July 17 - Potsdam conference
July 26 - Groves issues directive to 509 group - bg
Aug. 6 - Hiroshima - 20 kiloton Little Boy killed 80,000
Aug. 8 - Russia declared war on Japan - map
Aug. 9 - Nagasaki - 22 kiloton Fat Man kills 70,000
Aug. 15 - Emperor surrender broadcast - VJ Day
source
July 17 - Potsdam conference July 26 - Groves issues directive to 509 group - bg Aug. 6 - Hiroshima - 20 kiloton Little Boy killed 80,000 Aug. 8 - Russia declared war on Japan - map Aug. 9 - Nagasaki - 22 kiloton Fat Man kills 70,000 Aug. 15 - Emperor surrender broadcast - VJ Day source