SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, March 31, 2009       2:35 PM      Jim Little



1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638

A warm front will gradually spread rain into the region during the day Wednesday.  A trailing cold front will keep rain and snow going Wednesday night into early Thursday.  Mixing heights should be fairly high for good smoke dispersal conditions.  Transport winds will be generally southwesterly gradually backing to south-southwesterly late in the day.



    OUTLOOK (THURSDAY - SATURDAY):



As the cold front progresses east, post-frontal showers will continue most of Thursday, more numerous in the north.  Transport winds will turn more northwesterly.  Precipitation will end Friday as higher pressure builds in and dry weather will prevail throughout the region on Saturday.  Mixing heights should remain favorable for good smoke dispersion





2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height 3800 - 4800 ft during the morning.  Afternoon mixing height lowers to 2200 - 3200 ft then lowers below 1000 ft during the evening.



Transport wind SSW to WSW at 6 - 10 mph during the morning.  Transport wind increases to WSW to W at 12 - 24 mph during the afternoon and increases to WSW to W at 15 - 29 mph during the evening.



Surface wind SSE to SW at 4 - 8 mph during the morning.  Surface wind shifts to W to NW at 5 - 9 mph during the afternoon and shifts to SSW to WSW at 4 - 8 mph during the evening.



Zone 633 - 638:



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to SW to W at 9 - 15 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain.





OUTLOOK:



THURSDAY

In the west mixing height 2700 to 3700 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 3400 to 4400 ft during the morning rising above 5000 ft during the afternoon.  In the west transport wind WSW to W at 18 - 32 mph.  In the east transport wind WSW to W at 13 - 25 mph.  Surface wind SSE to SSW at 6 - 12 mph during the morning becoming WNW to NNW at 10 - 22 mph during the afternoon.



FRIDAY

Mixing height 2900 to 3900 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 10 - 18 mph.  Surface wind WNW to NNW at 10 - 18 mph.



SATURDAY

Mixing height 2800 to 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



3.  BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638

    The following considerations should be adhered to in addition to

    the requirements of the Oregon Smoke Management Plan. These

    Instructions are valid for burning conducted on Wednesday, April 1, 2009.

    ==================================================================



Zone 630 and 632:

Avoid ignitions within 15 miles to the SW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SW through WNW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.



Zone 633 - 638:

Avoid ignitions within 12 miles to the S through WNW of SSRAs.  No additional restrictions necessary.



    =========================================================

4.  SPECIAL NOTE:



    The smoke management forecaster is available at (503)-

    945-7401. Please call this number and not individual's

    numbers to discuss daily burning.  For large burns (over

    2000 tons) or burns extending over a considerable period,

    please request a special forecast.  Avoid calling before

    8 a.m. and between 2 to 3 p.m.



    This forecast is available on the Internet at:

      http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management



    Please ensure your units have been planned and accomplished by checking:

      http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml
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