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, April 8, 2009       2:35 PM      Nick Yonker

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

Upper level low is moving off to the east today after providing moisture to mainly the southern part of the state.  The next upper trough and cold front will move in tomorrow bringing an increase in moisture.  Air mass will remain unstable and smoke dispersion decent under light to moderate wind flow.

    OUTLOOK (FRIDAY - SUNDAY):

Upper level trough moves through Friday as it dives to the south into California.  Expect some lingering showers in the cool, unstable air mass.  Snow level will be near 4000 ft.  Minor ridge builds in Saturday providing some warming and drying.  Next stronger front and trough arrive Sunday afternoon and evening bringing a good dose of moisture and wind.  Other than nighttime stability, mixing and smoke dispersion will remain good to excellent through the period.

2.  DISPERSION

THURSDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning.

Transport wind S to SW at 7 - 11 mph.

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

OUTLOOK:

FRIDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNE at 6 - 10 mph.  Surface wind light and variable during the morning becoming NW to NNW at 8 - 12 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 10 - 20 mph.  Surface wind SW to W at 6 - 10 mph.

SUNDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind S to SW at 12 - 24 mph during the morning becoming SSW to SW at 22 - 38 mph during the afternoon.  Surface wind S to SW at 10 - 16 mph during the morning becoming SSW to SW 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 Thursday, April 9, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the SSE through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles in all directions of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  No additional restrictions necessary.

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