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, November 12, 2009       2:35 PM      Nick Yonker

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

Upper level low is moving through the region today bringing clouds and scattered showers.  This trough will move to the east tonight, then another front and trough approach early Friday.  Moisture, mostly snow, will move into the region during the late morning to early afternoon.  Air mass will be stable early then destabilize as the front moves in during the day.  Breezy S to W flow will make for good to excellent smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Upper level trough moves by to the east leaving the region under chilly northerly flow for Saturday.  Upper level ridge moves in later Saturday, stabilizing the air mass.  Ridge moves overhead early Sunday providing a dry and fair day.  Ridge will move by to the east Monday but air mass will remain dry and stable.  Wind flow will become light and variable Saturday, then as the ridge moves through Sunday and Monday, winds will increase from the S to SW.  Smoke dispersion will be fair Saturday and Sunday then improve Monday.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 2800 - 3800 ft by late morning.  Afternoon mixing height rises above 5000 ft and remains above 5000 ft through the evening.

Transport wind S to SW at 14 - 26 mph during the morning.  Transport wind shifts to WSW to WNW at 14 - 26 mph during the afternoon and evening.

Surface wind S to SW at 10 - 19 mph during the morning.  Surface wind shifts to WSW to WNW at 10 - 17 mph during the afternoon and evening.

OUTLOOK:

SATURDAY
Mixing height 2000 to 3000 ft during the morning rising to 2800 to 3800 ft during the afternoon.  Transport wind WNW to NNW at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

SUNDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 2300 to 3300 ft during the afternoon.  Transport wind S to SW at 6 - 10 mph.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning and through the afternoon.  Transport wind SE to SSW at 10 - 18 mph.  Surface wind SE to S at 6 - 10 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, November 13, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the S through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the S through NNW in or near drainages leading to SSRAs.  Watch for shifting transport winds.  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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