Downburst captured by High Dense Ground Observation Network "POTEKA" on 22 August 2014

Abstract

Meisei Improved developed low-cost compact weather sensor "POTEKA" in 2013. The following year, we further improved POTEKA to observe wind direction, wind speed and rainfall. Additionally, we can obtain real-time meteorological information (temperature, pressure and etc.) per one minute in total 145 stations. Downburst occurred in the August 22 2014 (case 1), POTEKA could capture the temperature drop and pressure peak. In comparison with the case of downburst on 11 August 2013 (case 2), temperature decrease rate is about half, after the pressure peak was maintained a high pressure state. In addition, thickness of cold air flow of case 1 was estimated lower than case 2 about a few tens of meters.