SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instruction

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Saturday, May 23, 2009       2:35 PM      Jim Trost

The weather/smoke management office will be closed Sunday for the Memorial Day holiday.  A forecaster will be available Monday to prepare an instruction for Tuesday and to assist in planning for Tuesday's burning.  Recommend against burning on Sunday and Monday.


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

West to southwest flow aloft over the Pacific Northwest brings warm dry weather to western Oregon.  Afternoon heating creates enough instability to threaten a slight chance of thunderstorms.  Light northerly transport continues.  Surface winds light enough that terrain controls nighttime smoke movement.  Poor night and morning dispersion but heating brings generally good dispersion in the afternoon.

    OUTLOOK (MONDAY - WEDNESDAY)

Not a lot of change through mid-week.  If anything, the upper level pattern tends to a stronger ridge and more limited mixing. Transport flow mostly northerly through the period.  However, watch out for terrain controlled surface flow during the nights and early mornings.  Poor dispersion in the mornings but heating will provide good dispersion during the afternoons.

2.  DISPERSION

SUNDAY
Mixing height 2200 - 3200 ft during the morning, 3800 - 4800 ft in the afternoon and  1800 - 2800 ft during the evening.  Mixing height falls below 1000 ft overnight.

Transport wind NW to N at 8 - 12 mph during the morning and NW to N at 12 - 20 mph during the afternoon and evening.

Surface wind W to NE at 6 - 10 mph during the morning and NW to N at 10 - 17 mph during the afternoon and evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early, 2500 to 3500 ft by late morning, and 3800 to 4800 ft during the afternoon.  Transport wind light and variable during the morning, becoming NW to N at 5 - 9 mph during the afternoon.  Surface wind light and variable, becoming NW to N at 8 - 14 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early, 2600 to 3600 ft by late morning, and 3700 to 4700 ft during the afternoon.  Transport wind NE to E at 4 - 8 mph during the morning, becoming NW to N at 6 - 10 mph during the afternoon.  Surface wind light and variable, becoming NW to N at 8 - 12 mph during the afternoon.

WEDNESDAY
Mixing height below 1000 ft early, 2500 to 3500 ft by late morning, and 3600 to 4600 ft during the afternoon.  Transport wind NE to E at 4 - 8 mph during the morning and N to NE at 4 - 8 mph during the afternoon.  Surface wind light and variable, becoming WNW to NNW at 5 - 9 mph during the afternoon.

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, May 24, 2009.
    ==================================================================

Recommend against burning over the Memorial Day holiday.  At a minimum, avoid ignitions within 14 miles to the NW through NNE of SSRAs and recreation areas.  For units that will smolder into the evening, avoid burning within at least 35 miles to the NW through E in or near drainages leading to SSRAs.  Recommend against burning units that will smolder 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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