Caption: +700 hPa geopotential height (solid contours every 3 dam). +700 hPa temperature (dashed contours every 3 C). +700 hPa Q-vectors (arrows in x10-7 Pa m-1 s-1). +RHS of the Q-vector form of the QG Omega equation [shaded according to the colorbar (10-12 Pa m-2 s-1)]. Warm (cold) colors denote regions of forcing for 700 hPa ascent (descent). +Image was generated from smoothed 1.0x1.0o NCEP-GFS data.