POTEKA (POint TEnki KAnsoku in Japanese) is a compact weather station that can observe multiple meteorological variables such as temperature, pressure, wind direction / speed. A high density ground surface observation network (POTEKA network) with the resolution of approximately 1~2 km has been composed by approximately 150 POTEKAs on the plain of Gunma and Saitama prefectures in Japan. The POTEKA network has observed several gust events such as downbursts and gust fronts. These observation results revealed that the two events of JEF1 downburst on July 14, 2016 and F1 downburst on June 15, 2015 had the similar characteristics while downburst occurrence, for example, the transition time relation between wind speed and temperature / pressure, the cumulonimbus advancing situation, the localized wind change and the horizontal scale of a downburst. The comprehension of these similar characteristics may be able to predict the downburst gust on the plain of Gunma and Saitama prefectures.