Solar wind parameters, measured at ACE, indicated the arrival of the
anticipated positive polarity coronal hole high speed stream (CH HSS).
Solar wind speed began the period ranging from 375 – 430 km/s. At
approximately 09/0450 UTC, speeds began a steady climb to near 470 km/s,
temperature and density increased simultaneously, and the phi angle
began changing to positive (away) orientation. Total field strength
increased to near 14 nT while the Bz component dropped to -14 nT. By the
end of the period, speeds had reached over 500 km/s and the phi angle
was solidly in a positive (away) orientation.