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, April 10, 2009       2:35 PM      Nick Yonker

****Smoke management will begin staffing the office 7 days-a-week beginning this Sunday, April 12th.  This will continue until burning declines considerably toward the beginning of summer.  Please call 503-945-7401 if you have questions or waivers to the instructions.****

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

Minor upper level ridge builds into the region on Saturday providing some warming and drying.  A minor disturbance will ride through the ridge and provide variable clouds however.  Residual cool air aloft will maintain good mixing levels.  Onshore flow will continue through the day, and along with good mixing heights, will make for good to excellent smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Upper ridge moves to the east Sunday giving way to a decent frontal system and upper level trough later in the day.  Overrunning moisture will move into the region during the afternoon with the main body of the front moving in during the evening and overnight.  Front will move through overnight with considerably cooler air moving in behind.  Snow level will lower from near 8000 ft on Sunday to 3000 - 4000 ft Monday morning.  Upper trough will move through Monday providing cool showers.  Trough moves by to the east Tuesday leaving the region under chilly but drier NW flow.  Smoke dispersion will be mostly good to excellent through the period.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1300 - 2300 ft during the evening.

Transport wind W to NW at 6 - 10 mph during the morning.  Transport wind increases to WNW to NW at 10 - 16 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Surface wind WSW to NW at 4 - 8 mph during the morning.  Surface wind increases to WNW to NNW at 9 - 15 mph during the afternoon then becomes light and variable and controlled by local terrain during the 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 S to SW at 6 - 12 mph during the morning becoming SW to W at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 6 - 10 mph during the afternoon.

MONDAY
Mixing height 4500 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 10 - 20 mph during the morning becoming WNW to NW at 15 - 25 mph during the afternoon.  Surface wind WSW to WNW at 8 - 12 mph.

TUESDAY
Mixing height 4500 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 9 - 15 mph.  Surface wind W to NW at 6 - 10 mph during the morning becoming NW to N at 8 - 12 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, April 11, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the W through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSW through N 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


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