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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Fri Dec 18 14:29:21 PST 2009


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

ISSUED: Friday, December 18, 2009       2:35 PM      Nick Yonker

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

Cold front pretty much fell apart as it came in last night.  Ridge has rebuilt and is keeping the air mass quite stable.  Next warm front arrives on Saturday increasing the chance of rain.  Expect continued stable conditions with light to moderate southerly winds.  Smoke dispersion will remain poor to fair.

    OUTLOOK (SUNDAY - TUESDAY):

Cold front moves in on Sunday bringing more rain and stronger wind.  Air mass destabilizes.  First upper trough will then follow through late Sunday.  Another cold front and stronger trough will then move in Monday afternoon and evening bringing more moisture and considerably cooler air aloft.  Snow level will drop to 2000 ft Tuesday morning.  Upper trough will move through early Tuesday followed by chilly NW flow aloft.  Air mass will destabilize further Monday and remain unstable Tuesday.  Expect good to excellent smoke dispersion through the period.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning.  Afternoon and evening mixing height similar to late morning.

Transport wind S to SSW at 10 - 18 mph.

Surface wind SSE to SSW at 5 - 9 mph.

OUTLOOK:

SUNDAY
Mixing height 2000 to 3000 ft during the morning rising to 3000 to 4000 ft during the afternoon.  Transport wind S to SSW at 13 - 25 mph during the morning becoming SSW to SW at 20 - 35 mph during the afternoon.  Surface wind SSE to SSW at 8 - 14 mph.

MONDAY
Mixing height 4000 to 5000 ft throughout the day.  Transport wind S to SSW at 18 - 32 mph.  Surface wind SSE to SSW at 9 - 15 mph.

TUESDAY
Mixing height 4500 to 5000 ft throughout the day.  Transport wind WSW to WNW at 15 - 30 mph.  Surface wind WSW to WNW at 10 - 18 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 Saturday and Sunday, December 19 and 20, 2009.
    ==================================================================

For Saturday:

Delay ignitions until 10 a.m.  Avoid ignitions within 15 miles to the SSE through SW of SSRAs.

For Sunday:

Avoid ignitions within 12 miles to the S through SW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  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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