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: Wednesday, April 22, 2009       2:35 PM      Nick Yonker

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

Dry cold front will move down from British Columbia today to usher in considerably cooler air and variable cloud cover.  Front doesn't appear to have enough juice to bring any widespread moisture, just isolated sprinkles.  Air mass will destabilize throughout the day as the cooler air moves in aloft.  Upper level trough will move in tomorrow to keep the air mass mostly unstable.  Smoke dispersion improves throughout the day today and will be good to excellent Thursday.

    OUTLOOK (FRIDAY - SUNDAY):

Following the passage of the upper level trough early Friday, the region will remain under cool, northerly flow through the period.  Another minor disturbance may move through the northerly flow on Sunday bringing a chance of some light, scattered showers.  Expect mixing and smoke dispersion to be good through the period.

2.  DISPERSION

THURSDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 4200 - 4800 ft during the evening.

Transport wind WNW to NNW at 10 - 18 mph.

Surface wind WNW to NNW at 10 - 16 mph during the morning and afternoon.  Surface wind decreases to NW to NNW at 8 - 14 mph during the evening.

OUTLOOK:

FRIDAY
Mixing height 3300 to 4300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 6 - 12 mph during the morning becoming NW to N at 12 - 22 mph during the afternoon.  Surface wind WSW to WNW at 4 - 8 mph during the morning becoming NW to N at 10 - 20 mph during the afternoon.

SATURDAY
Mixing height 2800 to 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 6 - 10 mph.  Surface wind light and variable during the morning becoming WNW to NNW at 8 - 12 mph during the afternoon.

SUNDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNE at 4 - 8 mph.  Surface wind light and variable during the morning becoming NW to NNE at 5 - 9 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 Thursday, April 23, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the WNW through N of SSRAs.  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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