Radar is perhaps the best method for hydrologists and meteorologists to measure precipitation over large areas all at once, particularly in rural areas where surface rain gages are few and rainfall reports are infrequent. Unfortunately radar precipitation estimates have several inherent deficiencies such as: (1) data void areas due to mountains blocking the radar beam, (2) contamination due to large hail, or non-meteorological targets such as insects, and (3) the inability to capture precipitation processes which occur below the radar beam and close to the ground. Since these deficiencies are present, radar precipitation estimates are frequently compared to actual surface rain gage data for accuracy.