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, November 30, 2009       2:35 PM      Jim Little

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

An upper level ridge in the eastern Pacific and Gulf of Alaska will dominate weather this week.  At the surface a strong surface high pressure area drops out of Canada and heads towards the northern Rockies.  With subsiding air aloft mixing heights will be suppressed.  Expect very light winds.  Poor to marginal smoke dispersal conditions on Tuesday will further deteriorate Wednesday and Thursday.

    OUTLOOK (TUESDAY-FRIDAY)

The upper ridge axis noses over into southeast Alaska and western Canada.  This will give northerly flow aloft and keep atmospheric conditions very stable through the week.  Expect marginal burning conditions most areas at least through Friday.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 1400 - 2400 ft during the morning.  Afternoon mixing height rises to 2300 - 3300 ft then lowers below 1000 ft during the evening.

Transport wind N to NE at 6 - 10 mph.

Surface wind N to NE at 4 - 8 mph during the morning.  Surface wind becomes light and variable and controlled by local terrain during the afternoon and evening.

Zone 633 - 638:
Mixing height 1200 - 2200 ft during the morning.  Afternoon mixing height rises to 2300 - 3300 ft then lowers below 1000 ft during the evening.

Transport wind NNW to NE at 6 - 10 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.

Surface wind NNW to NNE at 6 - 10 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

WEDNESDAY
In the west mixing height below 1000 ft during the morning rising to 1700 to 2700 ft during the afternoon.  In the east mixing height 1000 to 2000 ft during the morning rising to 1700 to 2700 ft during the afternoon.  Transport wind ESE to S at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

THURSDAY
Mixing height 1000 to 1700 ft throughout the day.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height below 1000 ft during the morning rising to 1000 to 2000 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, December 1, 2009.
    ==================================================================

Zone 630 and 632:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 11:00am.  Avoid ignitions within 20 miles to the N through E of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the N through SSE in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

Zone 633 - 638:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 11:00am.  Avoid ignitions within 20 miles to the NNW through E of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

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