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Moisture Convergence Contour - -12 hr

Moisture Convergence Contour - -12 hr
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Contour plot of the convergence of surface winds weighted by the moisture in the atmosphere represented by the surface specific humidity. Positive areas represent where winds are converging and thus forcing upward motion. Negative areas often reflect the presence of sinking motion. Since this is weighted by the moisture, high values of convergence can often represent areas where forced convection (possible thunderstorms) may occur.