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 7, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will remain anchored off the Pacific Northwest coast through tomorrow keeping skies mostly clear and temperatures pleasant.  Air mass will remain mostly stable.  Light to moderate NW winds will keep smoke dispersion poor to fair.

    OUTLOOK (FRIDAY - SUNDAY):

A mostly dry cold front will drop down from the north on Friday bringing some clouds and a chance of sprinkles or snow flurries.  Cooler air will move in aloft and destabilize the air mass.  Cooler, northerly flow will remain over the region through Saturday and early Sunday before getting driven eastward by the ridge in the eastern Pacific later Sunday.  Wind flow will turn offshore.

2.  DISPERSION

THURSDAY
Mixing height below 1000 ft early rising to 3200 - 4200 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1000 - 2000 ft during the evening.

Transport wind WNW to NNW at 5 - 9 mph during the morning.  Transport wind increases to WNW to NNW at 8 - 16 mph during the afternoon and evening.

Surface wind WNW to NNW at 4 - 8 mph.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 2700 to 3700 ft by late morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 5 - 9 mph during the morning becoming NNW to NNE at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 8 - 14 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 4 - 8 mph.  Surface wind light and variable during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NE to E at 4 - 8 mph during the afternoon.  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 8, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the WSW through NNW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Complete ignitions by 4 p.m.

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