Janet Yellen Explains Why She Hiked In A 0.9% GDP Quarter: Live Webcast

It appears that, the worse the economy was doing, the higher the odds of a rate hike.
Putting the Federal Reserve's third rate hike in 11 years into context, if the Atlanta Fed's forecast is accurate, 0.9% GDP would mark the weakest quarter since 1980 in which rates were raised (according to Bloomberg data).