Loop ReVerse



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850 hPa streamfunction (thin black contours every 2x106 m2 s-1, negative dashed, positive solid), potential temperature (solid contours every 2oC, positive red, negative purple), Qs (arrows in x10-10 K m-1 s-1), and Qs convergence (arrows in x10-15 K m-2 s-1). Temperature and wind are smoothed using a 9-point local smoother run 80 times.
These plots are derived from the NCEP GFS analyses and forecasts on a 0.25x0.25o latitude-longitude grid.