Compare between any two dates. The target day should not be a future date, and the baseline day should be earlier than the target day.
Optimal Scenario: Given Day1 (20150801) and Day2 (20150802), anomalous melting is detected between two consecutive or continuous days.
Alternative or Hypothetical Scenario: Given Day1 (20150801) and Day2 (20150830), anomalous melting is detected for a cumulative time period over 30 days.