SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Sat May 30 14:29:48 PDT 2009


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Saturday, May 30, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will weaken over the next couple of days as an upper low approaches from the southwest and a trough drops down from the north.  Southerly flow aloft will continue the thundershower threat over the region but mainly to the south.  Air mass will remain stable and smoke dispersion mostly poor due to little wind movement.  Otherwise expect mostly fair skies.

    OUTLOOK (MONDAY - WEDNESDAY):

Upper level trough moves in closer on Monday and Tuesday.  However, expect little change in the weather other than slightly cooler temperatures. Isolated afternoon to evening thundershowers are still possible.  Expect little change to the air mass with stable mornings and unstable afternoons due to heating.  Wind flow will remain fairly light favoring NW to NE flow.  Smoke dispersion will remain poor to fair.

2.  DISPERSION

SUNDAY
Mixing height below 1000 ft early rising to 1800 - 2800 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NW to NNE at 6 - 10 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 6 - 10 mph during the afternoon then becomes light and variable during the evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNW to NE at 6 - 10 mph.  Surface wind light and variable during the morning becoming NW to N at 6 - 12 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 8 - 12 mph during the morning becoming NNW to NNE at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to NNE at 6 - 10 mph during the afternoon.

WEDNESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 6 - 12 mph during the morning becoming NNW to NNE at 6 - 10 mph during the afternoon.  Surface wind NNE to ENE at 5 - 9 mph during the morning becoming NW to NNE at 6 - 10 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 Sunday, May 31, 2009.
    ==================================================================

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