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Model: a 3D atmosphere of 16 terrain-following layers from the ground to 5.6 km, thinnest (~40 m) near the ground. Each layer carries wind, temperature (buoyancy) and smoke; vertical motion follows from mass conservation, so air rises over ridges and sinks in their lee. The air is well mixed below the mixing height, capped by an inversion and stably layered above, so ridges block and channel low-level flow and smoke tends to stay below the cap. Daytime heating and night-time cooling of the ground drive upslope and drainage winds and cold-air pools. Wind and temperature are nudged toward the forecast at each height: the National Weather Service near the ground (blended with station observations when holding current conditions) and NOAA HRRR aloft. Smoke is released up to its plume-rise height, carried with MacCormack transport and stirred vertically. It is still a simplified illustration, not an official smoke forecast.
Weather: National Weather Service (forecast and station observations); winds aloft and history: NOAA HRRR/GFS via Open-Meteo; past station winds: Iowa Environmental Mesonet. Roads: Esri, HERE, Garmin, © OpenStreetMap contributors. Elevation: USGS 3DEP.