Spaceweather.com writes: (link mine)
The CME launched toward Earth by the July 12th X-flare has not yet arrived. However, we are still within the forecast window set by analysts at the Goddard Space Weather Lab. The cloud should hit at 09:17 UT plus or minus 7 hours on Saturday, July 14th. Weekend auroras are likely.
In the meantime, you can check the WUWT Solar Reference page and watch the data from the satellites, the CME should announce its arrival prominently.