Airshed
Management
System

October 14 2025

Discussions will be issued MWF 

Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF. 

Another storm system will approach MT/ID from the southwest west and track from southern MT to northwest ND through Friday. This will keep clouds and moisture and cool weather in place through Thursday. 

Most of the area will have POOR dispersion with a few locations getting POOR to FAIR dispersion due to windier conditions mainly over southwest ID. 

Dispersion begins to improve over MT on Friday as clearing occurs and winds increase with FAIR to GOOD dispersion west of the Continental Divide and GOOD to VERY GOOD along and east of the Continental Divide. Northwest MT and north ID will retain POOR to FAIR dispersion but central and eastern ID will see FAIR to GOOD dispersion. 

Saturday is a windy pattern for MT for FAIR to GOOD dispersion but high pressure begins to build over ID for POOR to FAIR dispersion. 

Dan Borsum NRCC Meteorologist

October 16 2025

Discussions will be issued MWF 

Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF. 

Storm system spins over eastern MT but cool temperatures and low mixing heights will cover much of ID and MT. Higher elevations will see better mixing due to stronger winds aloft with southwest MT along and west of the Continental Divide into eastern ID being favored. Less clouds over southwest ID will aid dispersion. Otherwise expect most areas to have POOR to FAIR dispersion. 

Dispersion begins to improve over MT on Friday as clearing occurs and winds increase with FAIR to GOOD dispersion west of the Continental Divide and GOOD to VERY GOOD along and east of the Continental Divide. North ID will retain POOR to FAIR dispersion but central and eastern ID will see FAIR to GOOD dispersion. 

Saturday is a windy pattern for central and eastern MT for FAIR to GOOD dispersion but high pressure begins to build over ID and western MT for POOR to FAIR dispersion. 

Low pressure approaches on Sunday causing the atmosphere to become unstable supporting an improvement in dispersion especially for southern ID and MT along and east of the Continental Divide. Inversions may stay stronger over northwest MT and north ID valleys with fog limiting heating. 

Dan Borsum NRCC Meteorologist

October 17 2025

Discussions will be issued MWF 

Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF. 

Dispersion begins to improve over MT on Friday as clearing occurs and winds increase with FAIR to GOOD dispersion west of the Continental Divide and GOOD to VERY GOOD along and east of the Continental Divide. North ID will retain POOR to FAIR dispersion but central and eastern ID will see FAIR to GOOD dispersion. 

Saturday is a windy pattern for central and eastern MT for FAIR to GOOD dispersion but high pressure begins to build over ID and western MT for POOR to FAIR dispersion. 

Low pressure approaches on Sunday causing the atmosphere to become unstable supporting an improvement in dispersion especially for southern ID and MT along and east of the Continental Divide. Inversions may stay stronger over northwest MT and north ID valleys with fog limiting heating. 

Dan Borsum NRCC Meteorologist