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.

1000 hPa Height, 1000-500 hPa Thickness, and RHS Sutcliffe-Petterssen

Caption:
+1000 hPa geopotential height (solid contours every 30 m).
+1000-500 hPa thickness (dashed contours every 6 dam).
+Total RHS of the Sutcliffe-Petterssen Development theory equation [shaded according to the colorbar (10^-9 s^-2)]. Warm (cold) colors denote regions of 1000 hPa (anti)cyclonic vorticity tendency in the Northern Hemisphere.
+Image was generated from 1.0x1.0^o NCEP-GFS data smoothed by a Gaussian filter with a weight of 25.