ForWarn discovered a decline anomaly in the Manistee National Forest, Michigan. The behavior of the anomaly is consistent with previous years. The area consisting of mesophytic glacial till and clay hills with sandy outwash bottoms supports oak and some pine. The cold conditions of the early spring greenup forced a delay in the cold-sensitive oaks. The phenology of the trees in the area were affected by the anomalous cold conditions and prompted a decline of vegetation greenness.