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, April 9, 2009       2:35 PM      Nick Yonker

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

Upper level trough will approach tonight and stretch to the south keeping the air mass cool and unstable.  Expect a few lingering showers but mainly over the mountains.  Otherwise look for partly to mostly cloudy skies.  Wind flow will be light onshore but with good mixing, smoke dispersion should be mostly good.

    OUTLOOK (SATURDAY - MONDAY):

Upper level trough weakens and moves to the east Saturday allowing for a minor upper level ridge to build in.  Air mass will warm and dry some.  Next front and trough move in on Easter and promise to bring plenty of moisture to most locations.  Expect fairly breezy conditions as well with this rather strong late season front.  Front moves by to the east later Sunday with the upper trough following on Monday.  Snow level will lower from 6000 - 7000 ft Sunday to near 3000 ft Monday morning.  Air mass will remain mostly unstable through the period and smoke dispersion good to excellent.

2.  DISPERSION

FRIDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.

Transport wind WNW to NNW at 5 - 9 mph during the morning.  Transport wind increases to WNW to NNW at 8 - 14 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NNW at 6 - 10 mph during the afternoon and evening.

OUTLOOK:

SATURDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to NW at 5 - 10 mph during the morning becoming W to NW at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to NW at 6 - 12 mph during the afternoon.

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.  Surface wind S to SW at 10 - 16 mph.

MONDAY
Mixing height 4500 to 5000 ft throughout the day.  Transport wind W to WNW at 12 - 24 mph.  Surface wind WSW to WNW at 9 - 15 mph.

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, April 10, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the W through NNW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.

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