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: Friday, April 17, 2009       2:35 PM      Nick Yonker

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

Weak cold front and upper trough are passing through the region this afternoon and will push east of the state this evening.  Next, the upper ridge will start building in over the weekend providing the warmest temperatures of the year.  Expect mostly clear skies.  Air mass will stabilize as temperatures warm aloft.  In addition, wind flow will become quite light, leading to generally poor smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Upper level ridge will remain firmly entrenched over the region through the period with only slight weakening on Tuesday.  Expect continued sunny skies and warm temperatures.  Mixing will be mostly poor except for brief afternoon instability.  Also, wind flow will remain light, leading to continued poor smoke dispersion.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises to 4500 - 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to SSW to WSW at 5 - 9 mph during the afternoon then becomes light and variable during the evening.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SE to SSW at 5 - 9 mph during the morning becoming S to SW at 5 - 9 mph during the afternoon.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

TUESDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind WSW to NW at 5 - 9 mph.  Surface wind light and variable during the morning becoming WSW to NW at 4 - 8 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 Saturday, April 18, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the SE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the SE through SW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly 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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