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Thursday April 3 2025
Maps of the airshed ratings available here:
Charts for the individual airsheds here: This includes the airshed table.
Today broad low pressure across ID and MT with cool temperatures. Most areas POOR to FAIR dispersion with moderate inversions and limited surface heating. Higher elevations of southwest MT and southeast ID FAIR to GOOD with unstable conditions.
Friday drying begins to move into the area from the west with FAIR to GOOD dispersion over ID. Still cooler with stronger inversion over MT for POOR to FAIR dispersion except for eastern MT with GOOD dispersion with stronger winds.
Saturday drying but warmer levels warming faster than the surface. FAIR to POOR dispersion. Exception northern part of the Panhandle and extreme NW MT with a bit better warming and FAIR to GOOD dispersion.
Sunday a cold front backs into northeast MT but increases winds for GOOD to VERY GOOD dispersion. The rest of the area stronger surface warming with FAIR to GOOD dispersion
Monday expect GOOD to VERY GOOD dispersion most areas though inversion may be maintained a bit longer into the day over some southwest MT valleys.
Dan Borsum NRCC Meteorologist
