Airshed
Management
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Burn Recommendations

Last Updated: 2019-04-21 11:03:01.553373 MST
Idaho
No Restrictions.
Montana

No Restrictions.

AS 2

#200635 - Monitor downwind smoke impacts/dispersion and residual smoke impacts to Hwy. 200, adjust accordingly.

AS 3A

#200189 - Monitor downwind smoke impacts/dispersion and residual smoke impacts to Hwy. 200, adjust accordingly.

AS 4

#200933, #200935, and #173869 - Monitor downwind smoke impacts/dispersion and residual smoke impacts to Hwy. 93, adjust accordingly.

AS 6

 

#174004 - Monitor downwind smoke impacts/dispersion and residual smoke impacts to Helena, adjust accordingly.


**Missoula County burns have been coordinated with county officials **


Meteorology/Dispersion Discussion

Last Updated: 2019-04-19 07:15:05.539194 MST

MARGINAL-GOOD dispersion Monday ID and Western MT under weak ridging. Light W-NW surface winds except Northerly in SW MT. GOOD dispersion Central/Eastern MT with SE-S surface winds. 

MARGINAL-GOOD dispersion Tuesday ID and Western MT under weak ridging. Light SW-NW surface winds. GOOD-EXCELLENT dispersion Central/Eastern MT with Westerly surface winds. 

GOOD dispersion Wednesday ID and Western MT under strong Westerly flow aloft. Westerly surface winds, except SW surface winds in Southern ID with EXCELLENT dispersion. EXCELLENT dispersion Central/Eastern MT with W-NW surface winds. 

GOOD-EXCELLENT dispersion Thursday ID and Western MT with Canadian cold front. W-NW surface winds. EXCELLENT dispersion Central/Eastern MT with strong NW surface winds. 

Tuesday 23 April Dispersion Forecast

MONTANA
Northwest (AS 1, 2): GOOD.
West Central (AS 3A, 3B, 4, 5, 6): GOOD.
Southwest (AS 7, 8A, 8B): GOOD.
Central/Eastern (AS 9, 10): GOOD AS 10, EXCELLENT AS 9.

IDAHO:

North (AS 11): GOOD. 

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

West Central (AS 14, 15, 21A):  MARGINAL.

East Central (AS 16, 17): MARGINAL.

Northeast (AS 18, 19): GOOD.

Southeast (AS 20): GOOD.

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


Prepared by Michael Richmond and Coleen Haskell Meteorologists, NRCC