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 28, 2010       2:35 PM      Jim Little

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

    TUESDAY

Upper air charts for Tuesday show a trough aloft with its axis extending from a low near the Queen Charlotte Islands southward to about 300 miles off the Oregon Coast.  This gives southwesterly flow aloft over the region.  Weather will be dry, with mostly sunny skies and temperatures near average.  Cool air aloft will allow maximum afternoon mixing heights to reach 5000 feet for generally good smoke dispersal conditions.

    OUTLOOK (WEDNESDAY-FRIDAY)

Onshore flow and cooler than average temperatures will continue through the outlook period.  A weak trough will remain over the area on Wednesday. Temperatures should be 6 to 9 degrees below average.  Maximum mixing heights will push to above 5000 feet most areas for good smoke dispersal conditions.  A progressive disturbance moving across the Pacific Ocean deepens the trough over the area and could produce some rain in the north on Thursday.  The trough axis will pass to the east Thursday evening.  Mixing heights should remain above 5000 feet most areas.  Temperatures will be around 10 degrees below average.  By Friday a cool west-northwesterly flow aloft will develop.  Skies will be mostly sunny buy temperatures will remain well below average for the time of year.  Maximum mixing heights will remain high.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 1700 - 2700 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1700 - 2700 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNW to NNE at 10 - 18 mph during the afternoon and increases to NNW to N at 15 - 25 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 10 - 18 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height 3400 - 4400 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1400 - 2400 ft during the evening.

Transport wind W to NW at 5 - 9 mph throughout the day.

Surface wind W to NW at 5 - 9 mph.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 2600 to 3600 ft by late morning rising to 4300 to 5000 ft during the afternoon.  Transport wind NW to NNE at 5 - 9 mph.  Surface wind NW to N at 4 - 8 mph.

THURSDAY
Mixing height 2800 to 3800 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming W to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.

FRIDAY
Mixing height 3200 to 4200 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to NNE 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 29, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the W through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the W through NNE in or near drainages leading to SSRAs.

Zone 633 - 638:
Avoid ignitions within 15 miles to the WSW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the WSW 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.

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