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: Wednesday, April 29, 2009       2:35 PM      Jim Little

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

The upper low that brought wet, cool weather to the Pacific Northwest has been slow to move out but by Thursday afternoon should be just a memory.  There may still be some scattered showers around but by afternoon skies should turn to partly cloudy to mostly sunny.  Transport winds will be generally northwesterly to westerly. Mixing heights should remain high for favorable smoke dispersal conditions.

    OUTLOOK (FRIDAY-SUNDAY):

The upper low that brought wet, cool weather to the Pacific Northwest has been slow to move out but by Thursday afternoon should be just a memory.  There may still be some scattered showers around but by afternoon skies should turn to partly cloudy to mostly sunny.  Transport winds will be generally northwesterly to westerly. Mixing heights should remain high for favorable smoke dispersal conditions.

2.  DISPERSION

THURSDAY

Zone 630 and 632:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

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

Surface wind NW to NNE at 4 - 8 mph throughout the day.

Zone 633 - 638:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind NW to N at 6 - 10 mph throughout the day.

Surface wind NW to N at 6 - 10 mph.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 4400 to 5000 ft by late morning lowering to 2400 to 3400 ft during the afternoon.  In the west transport wind ESE to SSE at 13 - 25 mph.  In the east transport wind ESE to SSE at 10 - 18 mph.  Surface wind ESE to S at 4 - 8 mph during the morning becoming ENE to E at 8 - 14 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning and through the afternoon.  Transport wind NW to N at 10 - 20 mph.  Surface wind NW to N at 10 - 20 mph.

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 Thursday, April 30, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Complete ignitions by 4pm

Zone 633 - 638:
Avoid ignitions within 12 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Complete ignitions by 4pm

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