For your listening pleasure:
http://archive-server.liveatc.net/kt...2015-0330Z.mp3
You can hear one of your pilots announcing the go-around at 13:30 into this recording. The tower was closed so the flight-crew was self announcing on the Common Traffic Advisory Frequency.
He doesn't give a reason for a go-around but there was a very good chance that it was a wind-shear warning from the on-board instrumentation or another indicator of wind-shear.