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 22, 2010       2:35 PM      Nick Yonker

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

Flat upper level ridge noses into the region overnight and Friday bringing dry and fairly stable conditions tomorrow.  Ridge will shift eastward Friday night.  Expect mostly fair skies with seasonably afternoon temperatures after a frosty morning.  Smoke dispersion will be poor during the morning becoming fair during the afternoon.

    OUTLOOK (SATURDAY - MONDAY):

Upper level trough and minor disturbance moves in early Saturday bringing considerably cooler and unstable conditions Saturday.  Moisture is unlikely however.  Upper level ridge builds back into the region on Sunday, stabilizing the air mass again.  Ridge moves slowly eastward Monday.  Expect good smoke dispersion Saturday, and fair to good dispersion Sunday and Monday after poor mixing during the early morning hours.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 3800 - 4800 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 WSW to WNW at 7 - 13 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain.  Surface wind increases to SW to WNW at 5 - 9 mph during the evening.

OUTLOOK:

SATURDAY
In the west mixing height 2700 to 3700 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 2000 to 3000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 10 - 16 mph during the morning becoming WNW to NW at 13 - 25 mph during the afternoon.  Surface wind WSW to WNW at 6 - 12 mph during the morning becoming WNW to NNW at 10 - 18 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SE to S at 8 - 12 mph.  Surface wind ESE 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, April 23, 2010.
    ==================================================================

Avoid ignitions within 12 miles to the SW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the SW through NW 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


Nick Yonker
Meteorology Manager
Oregon Department of Forestry
503-945-7451


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