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Burn Recommendations

Last Updated: 2018-09-23 13:06:29.396933 MST
Idaho
No Restrictions
Montana

AS 1 - #17292 Big Steep Unit 4, #172998 5 Creeks Unit (111 ac) and #170276 Tween Unit 136 (32 ac). Limit your acreage to 142 ac per your note on 9/21/18 to limit smoke impacts to  lake corridor (HWY 37) and Eureka Non Attainment area.


AS *3A/*3B. No restrictions for 9/24(*Missoula County only).  Call Sarah Coefield if reconsidering burning in Seeley Lake for today.

No other restrictions


Meteorology/Dispersion Discussion

Last Updated: 2018-09-23 12:40:14.475162 MST

Monday, September 24 Discussion: Northwest flow aloft over the western airsheds between strong ridging off the Pacific coast and troughing over the Central US will persist through Thu. Best dispersion for the western airsheds will be today, then more limited each day thereafter as surface winds become lighter, and valley inversions stronger and harder to break. A pattern change to NE low-level flow over North ID and Western MT may occur Fri/Sat when a trough drops south from Canada. 

GOOD dispersion Today ID and Western MT under NW flow aloft with broad upper trough over the Dakotas. W-NW surface winds.  EXCELLENT dispersion Central/Eastern MT with NW surface winds. 

MARGINAL-GOOD dispersion Tuesday ID and Western MT under NW flow aloft with light W-NW surface winds. EXCELLENT dispersion Central/Eastern MT with NW surface winds. 

MARGINAL-GOOD dispersion Wednesday ID and Western MT under NW flow aloft with weak upper trough over the Dakotas. Light SW-W surface winds.  EXCELLENT dispersion Central/Eastern MT with NW surface winds. 

MARGINAL-GOOD dispersion Thursday ID and Western MT under NW flow aloft with weak upper trough over the Dakotas. Light SW-W surface winds.  GOOD-EXCELLENT dispersion Central/Eastern MT with SW-W surface winds Central MT and S-SE Eastern MT. 

MARGINAL-GOOD dispersion Friday ID and Western MT under NW flow aloft with weak upper trough dropping south from Canada. NE-E winds northern Panhandle and NW MT. SW-W surface winds Central and S ID and SW MT. EXCELLENT dispersion Central/Eastern MT with NE surface winds. Rain/snow. 

MARGINAL-GOOD dispersion Saturday ID and Western MT under weak upper trough. NE-E winds northern Panhandle and Western MT. SW-W surface winds Central and S ID and SW MT. EXCELLENT dispersion Central/Eastern MT with NE-E surface winds. 

 

Tuesday 25 September Dispersion Forecast

MONTANA

Northwest (AS 1, 2): MARGINAL.

West Central (AS 3A, 3B, 4, 5, 6): MARGINAL. 

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

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


IDAHO:

North (AS 11): MARGINAL. 

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

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

East Central (AS 16, 17): MARGINAL.  

Northeast (AS 18, 19): MARGINAL. 

Southeast (AS 20): MARGINAL. 

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


Prepared by Michael Richmond, Meteorologist NRCC