July 12, 2012
The Sun Today: Solar Facts and Space Weather
Here is the computer model from NASA Goddard Space Weather Center. The CME is predicted to impact Earth, Messenger, Spitzer, MSL, Mars. The CME is expected to impact Earth 7/14/2012 at 10:20 UT (+-7 hrs), 6:20 am EDT.
The predicted impact is for a G2 - G4 level geomagnetic storm, moderate to severe. This could produce aurora as far south as northern California and Alabama. This would be into central UK and Europe or southern New Zealand. At its worst it could lead to some intermittent satellite/radio navigation problems, surface charging on satellites and power grid fluctuations. But the larger storm is less likely as these are rough estimates.