|Ventilation<adjective measures the atmosphere's capacity to disperse pollution. It combines windspeed and mixing height, essentially measuring the size of the curtain of air that passes over a point on the edge of a fire. Prescribed burning in Colorado is seldom permitted if an inversion is likely to last all day, indicated by forecasted ventilation of 'poor' all day.|
Forecasts from entities other than NWS could be useful to you for other purposes but may not be used to establish smoke permit compliance.
Smoke weather ventilation patterns (658 Kb)