The somewhat poorly drained, sandy Willowbrook soils have a mollic epipedon and are on lower flood plains. Moderately well drained. Runoff is very low. Permeability is rapid. February through May in most years.
Flooding is rare, very brief duration.
Most areas are in cropland. Wheat, grain sorghum and alfalfa are the principal crops. LRR H Great Plains Winter Wheat and Range, MLRA 79 Great Bend Sand Plains. The series is of small extent. These soils were formerly mapped as the Canadian series.