Airshed
Management
System

Airshed charts and summary table can be found here and maps can be found here.

Winds increase on Wednesday behind a disturbance moving through Canada for central and southwest MT.  MT east of the Continental Divide and central and southern ID FAIR to GOOD dispersion. North ID and western MT inversions stay strong with cool air trapped at the surface with POOR to FAIR dispersion. 

Upper level high pressure begins to break down on Thursday and a warm front moves east of the Continental Divide. Dispersion continues to be FAIR to GOOD for central and eastern MT. Northwest MT inversions strengthened by warm air aloft and light winds for POOR dispersion. Clouds increasing over ID reducing most dispersion to POOR to FAIR except FAIR to GOOD extreme southwest ID. 

Storm system develops over central MT on Friday with gusty winds. Despite clouds and cooler temperatures most places FAIR to GOOD dispersion. Precipitation over central and western MT may limit burning potential.

Saturday airmass stabilizes considerably over the region. POOR dispersion except eastern MT where winds will be stronger for FAIR to GOOD dispersion. 

 Dan Borsum - NRCC Meteorologists