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500 hPa Height, Temperature, and Geostrophic Relative Vorticity

Caption:
+500 hPa geopotential height (solid contours every 6 dam).
+500 hPa temperature (dashed contours every 3^oC).
+500 hPa geostrophic relative vorticity [shaded according to the colorbar (10^-5 s^-1)].
+Image was generated from 1.0x1.0^o NCEP-GFS data (unsmoothed).