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: Sunday, November 1, 2009       2:35 PM      Jim Little

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

    ** Stable Pattern - Poor Smoke Dispersal Conditions Through Mid-Week **

Upper level heights hold strong in spite of a short wave moving into British Columbia on Monday.  The atmosphere will remain very stable for poor smoke dispersal conditions except for possible brief marginal conditions mid afternoon.  Mixing heights will remain low.  Surface pressure gradients flat for light winds.  Except for some morning fog in the valleys hazy fall sunshine will rule.


    OUTLOOK (TUESDAY-THURSDAY)

The upper ridge builds on Tuesday and surface high pressure increases over the region.  Generally sunny and pleasant weather will continue with light winds and poor smoke dispersal conditions.  Wednesday will be a near repeat of Tuesday with very low mixing heights although winds aloft will increase a bit from the southwest.  Real improvement will not occur until at least Thursday when smoke dispersal conditions will be fair with an upper trough approaching.  This will cool temperatures aloft to help destabilize the atmosphere a bit.  In addition transport winds will be stronger from the south by Thursday.

2.  DISPERSION

MONDAY

Zone 630 and 632:
Mixing height 1500 - 2500 ft during the morning.  Afternoon mixing height rises to 3000 - 4000 ft then lowers below 1000 ft during the evening.

Transport wind SSW to WSW at 6 - 12 mph during the morning.  Transport wind shifts to NW to N at 6 - 10 mph during the afternoon and evening.

Surface wind S to SW at 5 - 9 mph during the morning.  Surface wind shifts to NW to N at 6 - 10 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Zone 633 - 638:
Mixing height 2300 - 3300 ft during the morning.  Afternoon mixing height rises to 3000 - 4000 ft then lowers below 1000 ft during the evening.

Transport wind S to SW at 5 - 9 mph during the morning.  Transport wind shifts to W to NW at 8 - 12 mph during the afternoon and evening.

Surface wind S to SW at 5 - 9 mph during the morning.  Surface wind shifts to W to NW at 5 - 9 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 1200 to 2200 ft by late morning rising to 2500 to 3500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

WEDNESDAY
Mixing height below 1000 ft early rising to 1000 to 1700 ft by late morning rising to 1600 to 2600 ft during the afternoon.  Transport wind light and variable.  Surface wind SE to SSE at 22 - 38 mph during the morning becoming light and variable during the afternoon.

THURSDAY
Mixing height below 1000 ft during the morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SSE to SW at 6 - 12 mph.  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 Monday, November 2, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

Zone 633 - 638:
Avoid ignitions within 15 miles to the S through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the S through NW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Watch for shifting transport winds.  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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