  We report on the detection of source noise in the time domain at 162MHz with
the Murchison Widefield Array. During the observation the flux of our target
source Virgo A (M87) contributes only $\sim$1\% to the total power detected by
any single antenna, thus this source noise detection is made in an intermediate
regime, where the source flux detected by the entire array is comparable with
the noise from a single antenna. The magnitude of source noise detected is
precisely in line with predictions. We consider the implications of source
noise in this moderately strong regime on observations with current and future
instruments.
