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, May 25, 2009       2:35 PM      Jim Little

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

The Pacific Northwest will remain under a generally west-southwest flow aloft on Tuesday.  A weak front will move by to the north, but the only effect on this area should be a few high clouds.  Mixing heights should be favorable for good smoke dispersal. Transport winds will be generally northwesterly.

    OUTLOOK (WEDNESDAY-FRIDAY)

Weak ridging aloft will continue the dry weather for the area on Wednesday.  Transport winds will be generally northerly.  Mixing heights still providing good smoke dispersal conditions.  However nighttime inversions will hold residual smoke close to the ground during the early morning hours.  Thursday and Friday the ridge sharpens a bit with its axis to the east for more southerly flow over the region.  This could allow isolated thunder storms over mountainous areas.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 3200 - 4200 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2400 - 3400 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NW to NNW at 8 - 12 mph during the afternoon and increases to NW to N at 10 - 18 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 9 - 15 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height 3300 - 4300 ft during the morning.  Mixing height rises above 5000 ft during the afternoon 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 NW to N at 8 - 12 mph during the afternoon and increases to NNW to N at 10 - 22 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 8 - 12 mph during the afternoon and evening.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 2900 to 3900 ft by late morning rising to 4300 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 6 - 12 mph during the afternoon.

THURSDAY
Mixing height 2600 to 3600 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height 2700 to 3700 ft during the morning rising to 4500 to 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 Tuesday, May 26, 2009.
    ==================================================================

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

Zone 633 - 638:
Avoid ignitions within 15 miles to the W through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the W through NNE in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  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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