1. An occurrence-data storage system, comprising: (a) a data storage device; (b) a plurality of distributed sensor nodes, each sensor node being respectively operable to sense and communicate data related to a parameter; (c) a computing device coupled with the data storage device and operable to communicate with the plurality of distributed sensor nodes; and (d) instructions loaded on the data storage device that, when executed by a processor of the computing device, configure the computing device to: (i) store an instance of data related to the sensed parameter from a first sensor node of the plurality of sensor nodes in a first sensor data set in the data storage device; (ii) receive an input selection corresponding to a target-occurrence having a representative feature, the representative feature including at least one recognizable pattern of at least one parameter sensed by one or more of the sensor nodes; (iii) in response to the input selection corresponding to the target-occurrence, automatically search the first sensor data set for data correlating to the target-occurrence representative feature; (iv) when sensor data correlating to the target-occurrence representative feature is found, store the correlated sensor data in a retained data storage; and (v) delete the instance of data related to the sensed parameter from the first sensor data set according to a deletion sequence.