Airshed
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Burn Recommendations

Last Updated: 2020-10-28 15:00:01.199518 MST
Idaho

Air Stagnation Advisory for most of ID:  

Sandpoint/Bonner County  is under a open burn ban for Thursday.

See map for restrictions/approvals ALL AIRSHEDS

PLEASE Confirm favorable wind direction with test fire and monitor dispersion conditions throughout firing. Adjust/reduce acreage if smoke dispersion/air quality degrades. Conclude burning by 1600pm : Monitor air quality, adjust as needed.

Montana

AIRSHEDS 3A/3B - Coordinated with Missoula County; consider proposals above 5,000 ft if in the impact zone & 4500ft + above if outside of it.

See map for restrictions/approvals (ALL AIRSHEDS)

PLEASE Confirm favorable wind direction with test fire and monitor dispersion conditions throughout firing. Adjust/reduce acreage if smoke dispersion/air quality degrades. Conclude burning by 1600pm : Monitor air quality, adjust as needed.


Meteorology/Dispersion Discussion

Last Updated: 2020-10-27 08:34:13.763754 MST


*** An Air Stagnation Advisory remains in effect for the airsheds West of the Continental Divide through This morning. ***

POOR-MARGINAL dispersion in Idaho and Western Montana Today with Northwest flow/high pressure ridge aloft.  Light and variable surface winds. MARGINAL-GOOD smoke dispersion in Central/Eastern Montana with Northwest flow/high pressure ridge. Northwest-west surface winds.

MARGINAL-GOOD dispersion in Idaho and Western Montana Friday with Northwest flow aloft/weak trough of low pressure and surface cold front.  Southwest-northwest surface winds. Widely scattered snow showers in Northern half of Idaho and NW Montana. GOOD-EXCELLENT smoke dispersion in Central/Eastern Montana with Westerly flow aloft/weak trough of low pressure. Moderate westerly surface winds.

POOR dispersion in Idaho and Western Montana Saturday with Northwest flow/high pressure ridge aloft.  Light and variable surface winds. GOOD-EXCELLENT smoke dispersion in Central/Eastern Montana with moderate Northwest flow aloft and at the surface.

POOR dispersion in Idaho and Western Montana Sunday with West/Northwest flow/broad high pressure ridge aloft.  Calm surface winds except light southwest surface winds near the Continental Divide (As 2, 6, 7, and 8).  MARGINAL-GOOD smoke dispersion in Central/Eastern Montana with weak Northwest flow aloft. Light southwest-west surface winds.

POOR dispersion in Idaho and Western Montana Monday with weak Westerly flow/broad high pressure ridge aloft.  Calm surface winds except light southwest surface winds near the Continental Divide (As 2, 6, 7, and 8). Light East-northeast surface winds in Southern Idaho. MARGINAL-GOOD smoke dispersion in Central/Eastern Montana with weak West-Northwest flow/high pressure ridge aloft. Light south-southwest surface winds. 

Friday 30 October Dispersion Forecast

MONTANA:

Northwest (AS 1, 2): MARGINAL.

West Central (AS 3A, 3B, 4, 5, 6): MARGINAL in As 3A, 3B, and 4. GOOD in As, 5, and 6.

Southwest (AS 7, 8A, 8B): GOOD.

Central/Eastern (AS 9, 10):  EXCELLENT in As 9. GOOD in As 10.


IDAHO:

North (AS 11): MARGINAL.

North Central (AS 12A, 12B, 13): MARGINAL.

West Central (AS 14, 15): MARGINAL.

East Central (AS 16, 17): GOOD.

Southeast (AS 18, 19, 20): GOOD. 

Southwest (AS 21, 22, 23, 24, 25): GOOD.


Prepared by Coleen Haskell, NRCC Meteorologist