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: Wednesday, October 14, 2009       2:35 PM      Jim Little

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

An upper ridge builds over the region.  Mixing heights should remain high enough to provide fair smoke dispersal conditions.  Weather will be dry and as a surface high builds over Montana transport winds will shift from southwesterly early to southeasterly later in the day.

OUTLOOK (FRIDAY-SUNDAY)

Friday the surface high moves east and transport winds go southerly.  Dry weather continues most of Saturday, but a weak front will bring rain to the area late in the day and overnight.  Sunday will see a return to dry weather but flat surface gradients mean light and variable winds making burning near sensitive areas problematic.

2.  DISPERSION

THURSDAY

Zone 630 and 632:
Mixing height 1700 - 2700 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 2400 - 3400 ft during the evening.

Transport wind SSW to SW at 10 - 16 mph during the morning and afternoon.  Transport wind increases to S to SSW at 10 - 18 mph during the evening.

Surface wind SSW to SW at 8 - 12 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 1700 - 2700 ft during the morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers below 1000 ft during the evening.

Transport wind S to SW at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and evening.

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

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 3600 to 4600 ft during the afternoon.  Transport wind SSE to SSW at 9 - 15 mph.  Surface wind SE to SSW at 6 - 10 mph.

SATURDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning and through 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 Thursday, October 15, 2009.
    ==================================================================

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

Zone 633 - 638:
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.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.

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