The following are figures related to curvature calculated with CUBED scripts.
Instantaneous 300-hPa curvature (10^-6 m^-1) at 06z23Jan2017. Z300 contours (m) are superimposed.
Instantaneous 300-hPa curvature radius (km) at 06z23Jan2017. Z300 (m; black contours) and scalar wind speed (m^2/s^2; purple contours) are superimposed.