Airshed
Management
System

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

Friday the main low pressure system moves into the region bringing widespread shower and thunderstorm chances and cooler temperatures. POOR dispersion north and central ID and northern and western MT. POOR to FAIR dispersion eastern parts of central and southern ID and southern MT with warmer temperatures for a bit better mixing but light winds with limited smoke transport. GOOD dispersion southwest ID with better sunshine and wind. 

Pattern remains the same for Saturday with continued extensive cloud cover, light winds and shower activity. POOR dispersion except southwest ID with warmer temperatures and FAIR to GOOD dispersion. 

Sunday high pressure begins to move into the area from the west bringing some clearing but winds will remain light. Enough moisture will have fallen Friday and Saturday to support morning fog which might have trouble burning off in some valleys. POOR to FAIR dispersion all areas. 

Dan Borsum - NRCC Meteorologist