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: Saturday, October 16, 2010       2:35 PM      Nick Yonker



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



Weak upper level trough over the region today will dissipate and give way to an upper level ridge that will build into the region through early next week.  Surface high pressure will build to the north with a thermal trough moving up from California.  This will bring mostly northerly to offshore flow.  Expect mostly sunny skies with patchy fog in the valleys during the morning.  Air mass will further stabilize and with generally light wind flow, make for poor smoke dispersion.



    OUTLOOK (MONDAY - WEDNESDAY):



Upper level ridge continues to strengthen over the state Monday and Tuesday before slowly shifting eastward on Wednesday.  Expect little change in the pattern with high pressure to the north and a surface thermal trough to the south and west maintaining a very light wind flow.  Expect continued stable conditions through the period and poor smoke dispersion.



2.  DISPERSION



SUNDAY

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.  Afternoon mixing height rises to 3000 - 4000 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNW to NE at 6 - 10 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 1000 to 1800 ft by late morning rising to 2000 to 3000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft during the morning rising to 1700 to 2700 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



WEDNESDAY

Mixing height below 1000 ft during the morning rising to 2500 to 3500 ft during the afternoon.  Transport wind SE to S at 4 - 8 mph.  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 Sunday, October 17, 2010.

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



Avoid ignitions within 15 miles to the NNW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the NNW through NE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4 p.m.



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

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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