Mission – using subjective identification techniques on Streamline Charts at the start of 12-hourly rainfall period recorded in 1966-2012 with verification over an outside sample dataset in 2013-2021 at Hong Kong Charles Luk The author is also the owner of https://contourtechnique.ca/2026/01/07/a-fantastic-approach-for-easy-contour-drawing-and-simple-high-low-labeling/ New posting: 17 March 2026 -The study is re-titled to reflect that the majorityContinue reading “A Study of 200hPa Mid-latitude Disturbance Excitation behind a 12-hr Synoptic Scenario on Imminent Extreme Rainstorm Occurrence at the Subtropical Region”