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: Monday, June 21, 2010       2:35 PM      Jim Little

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

    TUESDAY

A weak upper level ridge slowly moves east over the region during the day on Tuesday.  Weather will be dry and skies mostly sunny across the region.  Mixing heights will climb to 5000 feet or above for good smoke dispersal conditions.

    OUTLOOK (WEDNESDAY-FRIDAY)

The weak upper ridge moves east and is replaced by southwesterly flow aloft on Wednesday.  Temperatures will bump up a few degrees, but a disturbance in the SW flow aloft may produce afternoon thunderstorms over the Cascades and into central Oregon, especially in the afternoon.  Maximum mixing heights will continue above 5000 feet for good smoke dispersal conditions throughout the outlook period. Skies will be partly cloudy Wednesday through Friday.  On Friday a cool northwesterly flow aloft develops.  Temperatures will generally be near to slightly below average.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 1100 - 2100 ft during the evening.

Transport wind light and variable and controlled by local terrain.  Transport wind increases to NNE to ENE at 10 - 16 mph during the evening.

Surface wind light and variable and controlled by local terrain.  Surface wind increases to NNE to ENE at 6 - 12 mph during the evening.

Zone 633 - 638:
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 NNW to NNE at 4 - 8 mph during the evening.

Surface wind light and variable and controlled by local terrain.





OUTLOOK:

WEDNESDAY
In the west mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising above 5000 ft during the afternoon.  In the east mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind ESE to SSE at 10 - 18 mph.  Surface wind ESE to S at 6 - 10 mph.

THURSDAY
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.

FRIDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.  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 Tuesday, June 22, 2010.
    ==================================================================

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 4:00pm.

Zone 633 - 638:
Avoid ignitions within 12 miles in all directions of SSRAs.  No additional restrictions necessary.  Complete ignitions by 4:00pm.

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