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A simple and easily remembered method is described for estimating cloud ceiling height in the field. Estimating ceiling height provides the means to estimate stability class, a parameter used to help determine Dispersion Index and Low Visibility Occurrence Risk Index, indices used as smoke management aids. Stability class is also used as an input to VSMOKE, an atmospheric dispersion model used to estimate prescribed fire smoke effects on air quality and visibility.doi:10.2737/srs-rn-4 fatcat:wldpvwawwzc47pxch76wza5uoy