SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Fri Dec 4 14:27:54 PST 2009


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, December 4, 2009       2:35 PM      Nick Yonker

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

Dry cold front and trough will drop down from the north this afternoon and evening and bring cooling temperatures aloft.  Air mass will destabilize Saturday as the cooler air moves in.  Expect mostly fair skies with chilly northerly winds.  Smoke dispersion will become mostly good by late morning to early afternoon on Saturday.

    OUTLOOK (SUNDAY - TUESDAY):

Another more arctic-like front will drop southward Saturday night to Sunday morning bringing very cold temperatures and the chance of some light snow or snow flurries Sunday.  Cold pool of air settles over the state for the rest of the period as the upper level low slowly moves to the south of the region.  Decreasing offshore wind flow and warming aloft while temperatures remain cold near the surface, will slowly stabilize the air mass again.  Smoke dispersion will be the best Sunday then worsen Monday and Tuesday.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1300 - 2300 ft during the evening.

Transport wind NNW to NNE at 9 - 15 mph.

Surface wind NNW to NNE at 6 - 11 mph.

OUTLOOK:

SUNDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 10 - 20 mph during the morning becoming NNE to NE at 15 - 30 mph during the afternoon.  Surface wind NNE to ENE at 7 - 13 mph.

MONDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind N to NE at 9 - 15 mph.  Surface wind NNW to NNE at 6 - 10 mph.

TUESDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

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 and Sunday, December 5 and 6, 2009.
    ==================================================================

For Saturday:

Avoid ignitions within 12 miles to the NNW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the NNW through ENE in or near drainages leading to SSRAs.  No additional restrictions necessary.

For Sunday:

Avoid ignitions within 10 miles to the NNE through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the N through ENE in or near drainages leading to 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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