Competing in her first meet of the season, Krishna went beyond the 64.72 meters mark that decided the gold medal in the 2008 Beijing Olympics.
It was also a marked improvement on her 2011 best of 62.25 meters which she achieved in October.
The gold in the ongoing event went to Beijing Olympics champion Stephanie Trafton, who threw 67.74 meters setting a new US record.
"I am happy with this performance. It was my first competition of the season and close to my personal best of 63.69 meter."
The bronze medal went to Gia lewis (62.88 meter).