This requires Javascript for an animation of the satellite imagery. You will need Netscape version 3.0 or higher or Internet Explorer 3.0 or higher and Javascript enabled to view this.

700 hPa Height, Temperature, Qnd-vectors, and Term A Qnd-vector QG Omega Equation

Caption:
+700 hPa geopotential height (solid contours every 3 dam).
+700 hPa temperature (dashed contours every 3 K).
+700 hPa nondivergent wind Q-vectors (arrows in x10^-7 Pa m^-1 s^-1).
+Term A of the Q-vector form of the QG Omega equation computed using the nondivergent wind [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 0.5x0.5^o NCEP-GFS data smoothed by 40 passes of a 9-point local smoother.