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: Thursday, May 14, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will build into the state tonight and Friday bringing sunshine and warmer temperatures.  Air mass will stabilize some during the night and morning hours but daytime heating should provide good mixing.  Wind flow will be light, favoring offshore to northerly flow as surface high pressure builds to the north.   Smoke dispersion will be mostly fair.

    OUTLOOK (SATURDAY - MONDAY):

Upper level ridge continues to build over the state on Saturday and Sunday, further stabilizing the air mass.  Ridge will then drift eastward later Sunday, opening the door for the next frontal system on Monday.  Expect mostly sunny skies and warm temperatures through Sunday.  The approaching trough will likely set off an evening marine push on Sunday.  Clouds increase Monday with moisture possibly moving in during the late afternoon to early evening.  Air mass destabilizes and smoke dispersion improves Monday as the front and trough move in.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain.  Transport wind increases to N to NE at 4 - 8 mph during the evening.

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

OUTLOOK:

SATURDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to SSW at 6 - 10 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SE to S at 5 - 9 mph during the morning becoming SSW to WSW at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 5 - 9 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SW to WSW at 10 - 20 mph during the morning becoming WSW to W at 18 - 30 mph during the afternoon.  Surface wind SSW to WSW at 8 - 12 mph during the morning becoming SW to W at 12 - 24 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 Friday, May 15, 2009.
    ==================================================================

Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.

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