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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Mon Dec 7 07:41:57 PST 2009


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

ISSUED: Monday, December 7, 2009       7:45 AM      Jim Little

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

An arctic air mass has overspread Oregon for a cold and mostly dry week.  A strong upper level high pressure area is centered over the northern Gulf of Alaska while an upper level low is positioned over southern Oregon.  This is giving a dry northeasterly flow aloft over the region.  Daytime mixing heights should give marginal to fair smoke dispersal conditions.  Nighttime inversions will hold smoke to near the ground.

2.  DISPERSION

MONDAY

Zone 630 and 632:
Mixing height 1000 - 1700 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind NE to E at 5 - 9 mph.

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

Zone 633 - 638:
Mixing height 1300 - 2300 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.

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

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 Monday, December 7, 2009.
    ==================================================================

Zone 630 and 632:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  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 SE 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.  Complete ignitions by 3:00pm.

Zone 633 - 638:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles in all directions 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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