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Anticipated Smoke PlumeTrajectory Determination
Locate the burn on a map and draw a line representing the centerline of the smoke plume. The length of the line should be greater than the screening distance. If the burn will last over a long period of time, draw another line showing predicted wind direction at the end of the burn.
To allow for horizontal dispersion of the smoke, as well as shifts in the wind direction, draw two other lines from the fire at an angle of 30 degrees from the centerline(s).