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We present ALFALFA HI observations of a well studied region of the Leo Cloud,which includes the NGC 3227 group and the NGC 3190 group. We detect opticallydark HI tails and plumes with extents potentially exceeding 600 kpc, wellbeyond the field of view of previous observations. These HI features containapproximately 40% of the total HI mass in the NGC~3227 group and 10% in theNGC~3190 group. We also present WSRT maps which show the complex morphology ofthe extended emission in the NGC~3227 group. We comment on previously proposedmodels of the interactions in these groups and the implications for the scaleof group processing through interactions. Motivated by the extent of the HIplumes, we place the HI observations in the context of the larger loose group,demonstrating the need for future sensitive, wide field HI surveys tounderstand the role of group processing in galaxy evolution.

ALFALFA and WSRT Imaging of Extended HI Features in the Leo Cloud of Galaxies