Fig. 1From: Ensemble experiments using a nested LETKF system to reproduce intense vortices associated with tornadoes of 6 May 2012 in Japan a Surface weather map and b weather map at the height of 500 hPa at 09:00 JST on 6 May 2012. b Solid and broken contours indicate height (m) and temperature (°C), respectively. Intervals of the solid and broken contours are 3 °C and 60 m, respectivelyBack to article page