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: Saturday, October 17, 2009       2:35 PM      Nick Yonker

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

Front and upper level trough will move into the region later today and tonight bringing a chance of some light rain to the region.  Most moisture will stay in the northern part of the region.  Minor ridging builds in early Sunday providing some modest stabilization.  Expect mostly cloudy skies on Sunday with some sun breaks.  Wind flow will be fairly light but with decent afternoon mixing, will make for fair to good smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY):

Front and upper level low move into the region early Monday providing another shot of moisture with the heavier amounts over the southern part of the state this time.  Low moves through Monday afternoon and gives way to a minor ridge that will develop over the state on Tuesday.  Again, this ridge will provide just brief and minor stabilization.  Another minor front will approach on Wednesday bringing another chance of some light rain.  Smoke dispersion should be mostly good through the period under this progressive weather pattern.

2.  DISPERSION

SUNDAY
Mixing height below 2000 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 4200 - 5000 ft then lowers below 1000 ft during the evening.

Transport wind SSE to SSW at 4 - 8 mph during the morning.  Transport wind shifts to SW to W at 6 - 10 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to NNW at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

TUESDAY
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 WSW to NW at 6 - 10 mph.  Surface wind light and variable.

WEDNESDAY
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 SW to WSW at 10 - 20 mph during the morning becoming WSW to WNW at 12 - 24 mph during the afternoon.  Surface wind S to SW at 5 - 9 mph during the morning becoming SW to WNW 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, October 18, 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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