The expected storm arrived as forecast during the night.
Fortunately, during the first couple of hours of the night,
several blazars were successfully observed for polarization through
the light cirrus that preceded the main cloud banks of the storm.
was measured at about 1 arcsec at the start of the night, but quickly
degraded to worse than 2 arcsec by the time operations were halted by
at just before 2200 local time.