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Airshed charts and summary table can be found here and maps can be found here.
Wednesday a cold front moves through bringing another round of wind. Montana will see GOOD to VERY GOOD dispersion. Front exits north ID early enough that winds may decrease early in the day and cloud cover will bring weaker surface mixing. POOR to FAIR dispersion in northern and central ID but FAIR to GOOD dispersion in southern ID where winds will stay stronger.
Thursday high pressure builds over the western Great Basin which stabilizes the airmass over north ID and western MT for POOR dispersion. Not as stable east of the Continental Divide and better chance to break inversions over southern ID for FAIR dispersion.
Friday a disturbance tracks across Alberta which weakens inversions and increases wind especially in most of MT and southern and central ID. POOR to FAIR dispersion over northern ID as inversions will be stronger with cooler temperatures. Eastern MT under strong high pressure for light winds for POOR to FAIR dispersion but GOOD to VERY GOOD dispersion other locations.
Dan Borsum - NRCC Meteorologist