Information for April 19, 2014

Burn Recommendations  latest update: 04/18/2014 15:03

MONTANA

No restrictions.

IDAHO

No restrictions.


These burn recommendations apply only to members of the Montana/Idaho Airshed Group. Nonmembers should follow any applicable local, state, or Tribal guidelines regarding open burning.


Meteorology/Dispersion Discussion  latest update: 04/18/2014 07:53

SATURDAY, April 19 Discussion

GOOD to EXCELLENT smoke dispersion conditions are expected Saturday as a weak Westerly flow pattern lingers over the region. The previous day's cold front will move into the Dakotas by mid-day taking the precip with it. Skies should begin to clear across the region by afternoon as a weak ridge of high pressure begins to approach from the West. Latest model data shows a weak cold front moving into N ID late Saturday night. This should help to minimize impacts from any weak valley/canyon temperature inversion that develops.

 

Extended outlook:

GOOD to EXCELLENT smoke dispersion conditions are expected on Sunday as a very weak cold front moves East across the region though an equally weak ridge of high pressure. Isolated showers may accompany the passage of the front across NW MT. Transport wind flow will be from the WSW and light except briefly gusty with the passage of the front.

 

GOOD to EXCELLENT smoke dispersion conditions are expected on Monday as a warm and unstable SW flow pattern develops in advance of a rather large, intensifying area of low pressure that is expected to move onto the coast of OR/WA in the late afternoon. Latest data holds off on convection and precipitation until Tuesday. Temperatures will be well above normal.

GOOD to EXCELLENT smoke dispersion conditions are expected Tuesday as the intensifying system along the OR/CA coast drifts inland. Southerly transport wind flow will continue to usher warm, moist and unstable air into ID and MT. Scattered showers and Thunderstorms will increase in coverage through the day...expecially across W ID.

 

For a smoke dispersion web briefing, click HERE. It will be the first link under the header NRCC Weather Products.


Saturday, April 19 Dispersion Forecast

MONTANA

Northwest (AS 1, 2): GOOD to EXCELLENT.

West Central (AS 3A, 3B, 4, 5, 6): GOOD to EXCELLENT.

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

Eastern Montana (AS 9 and 10): GOOD to EXCELLENT.

 

IDAHO:

North (AS 11): GOOD to EXCELLENT.

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

West Central (AS 14, 15, 21A): GOOD to EXCELLENT.

East Central (AS 16, 17): GOOD to EXCELLENT.

Northeast (AS 18, 19): GOOD to EXCELLENT.

Southeast (AS 20): GOOD to EXCELLENT.

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


Prepared by Bryan Henry, Northern Rockies Met

Forecast for

Burn Recommendations  latest update: 04/18/2014 15:03

MONTANA

No restrictions.

IDAHO

No restrictions.


Meteorology/Dispersion Discussion  latest update: 04/18/2014 07:53

SUNDAY, April 20 Discussion

GOOD to EXCELLENT smoke dispersion conditions are expected on Sunday as a very weak cold front moves East across the region though an equally weak ridge of high pressure. Isolated showers may accompany the passage of the front across NW MT. Transport wind flow will be from the WSW and light except briefly gusty with the passage of the front.

 

Extended outlook:

GOOD to EXCELLENT smoke dispersion conditions are expected on Monday as a warm and unstable SW flow pattern develops in advance of a rather large, intensifying area of low pressure that is expected to move onto the coast of OR/WA in the late afternoon. Latest data holds off on convection and precipitation until Tuesday. Temperatures will be well above normal.


GOOD to EXCELLENT smoke dispersion conditions are expected Tuesday as the intensifying system along the OR/CA coast drifts inland. Southerly transport wind flow will continue to usher warm, moist and unstable air into ID and MT. Scattered showers and Thunderstorms will increase in coverage through the day...expecially across W ID. 

 

GOOD to EXCELLENT smoke dispersion conditions are expected Wednesday as the broad, upper level low pressure system moves across ID and W MT and into Central MT by afternoon. Precipitation will become widespread and heavy at times. Moderate to heavy rainfall may change over to heavy snow in some locations. Transport wind flow will generally be light and from the South across E MT and from the NNE across Central MT-N ID.  S ID will likely experience WNW transport wind flow.


For a smoke dispersion web briefing, click HERE. It will be the first link under the header NRCC Weather Products.


Sunday, April 20 Dispersion Forecast

MONTANA

Northwest (AS 1, 2): GOOD to EXCELLENT.

West Central (AS 3A, 3B, 4, 5, 6): GOOD to EXCELLENT.

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

Eastern Montana (AS 9 and 10): GOOD to EXCELLENT.

 

IDAHO:

North (AS 11): GOOD to EXCELLENT.

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

West Central (AS 14, 15, 21A): GOOD to EXCELLENT.

East Central (AS 16, 17): GOOD to EXCELLENT.

Northeast (AS 18, 19): GOOD to EXCELLENT.

Southeast (AS 20): GOOD.

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


Prepared by Bryan Henry, Northern Rockies Met