Information for April 23, 2014

Burn Recommendations  latest update: 04/23/2014 16:35

MONTANA

No restrictions.

 

*Burns restrictions have been coordinated with Missoula County.*

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: 04/23/2014 07:41

WEDNESDAY, April 23 Discussion

GOOD to EXCELLENT smoke dispersion conditions will occur today as a broad, upper level low pressure system moves across ID and NW MT and into N Central MT by afternoon. Precipitation will be heaviest over ID and wrn MT today...with just scattered showers over central and ern MT.  Transport wind flow will be generally from the W and quite strong over and east of the divide in the afternoon.

 

Extended Outlook:

 

GOOD to EXCELLENT smoke dispersion conditions are expected on Thursday as the low pressure system drifts east across southern Saskatchewan. Areas of light snow are possible across the NE MT while the precip over N ID begins to pick up in coverage and intensity with the approach of a weak system. Western and Central MT should be mostly dry througout the day. Transport wind flow will be light-moderate and mostly from the NW.

GOOD to EXCELLENT smoke dispersion conditions are expected in afternoon on Friday under a southerly flow aloft ahead of the next upper level low moving into the western US. Morning inversions in the valleys of ID and wrn MT...limiting dispersion...will break by late morning. Showers will be increasing during the day...and scattered thunderstorms are expected over western and central MT in late afternoon. Transport winds will be light from the S to SW over ID, and from the SE over western/central MT. Eastern MT will see light NW transport winds.

 

GOOD smoke dispersion conditions are expected in Idaho and western MT Saturday...and GOOD to EXCELLENT conditions in central/eastern MT. A low pressure trough will be moving through MT...so enough instability will be present for scattered showers...but also to promote very good mixing conditions. Scattered showers over ID and western MT will be mainly over the mountains. Transport wind flow will be light W-NW over ID and western MT...and light S-SW over central and eastern MT.

  

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

 

Wednesday, April 23 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 Michael Richmond, Northern Rockies Met


Forecast for

Burn Recommendations  latest update: 04/23/2014 16:36

MONTANA

No restrictions.

 

*Burns restrictions have been coordinated with Missoula County.*

IDAHO

No restrictions.


Meteorology/Dispersion Discussion  latest update: 04/22/2014 16:43

THURSDAY, April 24 Discussion

 GOOD to EXCELLENT smoke dispersion conditions are expected on Thursday as the low pressure system drifts into SC Canada. Areas of moderate snow are possible across the HiLine of MT while the precip over N ID begins to pick up in coverage and intensity with the approach of a weak system. Western and Central MT should be mostly dry througout the day. Transport wind flow will be light and mostly from the NW.

 

Extended Outlook:

 

GOOD to EXCELLENT smoke dispersion conditions are expected on Friday the next system drifts E into W MT and SE ID. Precipitation in these areas will be on the increase through the day while N ID sees a gradual reduction in shower activity in the afternoon. Transport wind flow will be mostly from the East across MT and from the NNW across ID.

  

GOOD to EXCELLENT smoke dispersion conditions are expected to continue into Saturday as the low pressure area stalls over Central MT and WY. Intermittent rainfall is expected areawide, and some snowfall is possible in the higher terrain of W MT and N ID. Transport wind flow will generally be from the E across E MT and from the N across W MT and N ID.

 

GOOD smoke dispersion conditions are expected for Sunday as the low pressure system drifts into E MT and E WY. Moderate to heavy precipitation is expected with the passage of this system across the E half of MT. Across W MT and ID...high pressure will begin to build in from the W providing for a brief break in the weather. Transport wind flow will be from the N across most of MT and light and variable across ID.

 

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

 

 

Thursday, April 24 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