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: Friday, May 8, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will continue to build over the state today and through the weekend bringing warmer and drier conditions.  Air mass will stabilize during the night and morning hours but daytime heating will bring a period of good mixing.  Wind flow will remain generally light northerly.  Expect mostly fair smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Ridge reaches its peak over the state on Sunday bringing the warmest temperatures.  However, marine air will move in during the afternoon to evening as a trough and minor front move in on Monday.  Front will bring some scattered light showers to mainly the northern part of the region.  Trough moves by to the east on Tuesday.  Air mass will be stable Sunday morning then destabilize during the day.  Air mass will remain mostly unstable Monday and Tuesday under the influence of the trough pattern and brisk westerly flow.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 4500 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNW to NNE at 5 - 9 mph during the afternoon and evening.

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

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to S at 6 - 10 mph during the morning becoming SSW to SW at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 5 - 9 mph during the afternoon.

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 WSW to W at 15 - 25 mph during the morning becoming WSW to WNW at 18 - 32 mph during the afternoon.  Surface wind WSW to WNW at 10 - 18 mph.

TUESDAY
Mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 15 - 30 mph.  Surface wind WSW to WNW at 10 - 20 mph during the morning becoming WNW to NW 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 Saturday, May 9, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the NW through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of 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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