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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Thu Dec 3 14:24:21 PST 2009


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

ISSUED: Thursday, December 3, 2009       2:35 PM      Nick Yonker

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

Upper level ridge is flattening today and will open the door for a trough and cold front to drop down from the north.  Cooler air will move in tomorrow afternoon and start destabilizing the air mass.  Clouds will increase on Friday but moisture is not expected.  Wind flow turns onshore from the SW to NW.  Expect improving smoke dispersion through the day.

    OUTLOOK (SATURDAY - MONDAY):

Cold front and trough will drop to the south on Saturday bringing cooler but mainly dry air to the region.  Only expect some snow flurries or light snow showers.  Air mass will destabilize and wind flow turns offshore.  Another trough and more arctic-like air mass will drop southward bringing very chilly and unstable conditions on Sunday.  Again, moisture will be limited but snow flurries or snow showers will be likely.  Arctic northerly flow will continue into Monday.  Expect mostly good smoke dispersion through the period.

2.  DISPERSION

FRIDAY

Zone 630 and 632:
Mixing height below 1000 ft early rising to 1700 - 2700 ft by late morning.  Afternoon mixing height rises to 2800 - 3800 ft then lowers to 1800 - 2800 ft during the evening.

Transport wind WSW to WNW at 10 - 20 mph during the morning.  Transport wind increases to WNW to NW at 15 - 25 mph during the afternoon and evening.

Surface wind SSW to WSW at 6 - 10 mph during the morning.  Surface wind shifts to WNW to NW and increases to 10 - 16 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height below 1000 ft early rising to 2200 - 3200 ft by late morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers to 1500 - 2500 ft during the evening.

Transport wind SW to WSW at 10 - 18 mph during the morning.  Transport wind shifts to WNW to NW and increases to 12 - 24 mph during the afternoon and evening.

Surface wind SSW to WSW at 6 - 10 mph during the morning.  Surface wind shifts to W to NW and increases to 9 - 15 mph during the afternoon and evening.

OUTLOOK:

SATURDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 9 - 15 mph.  Surface wind NNW to NNE at 8 - 12 mph.

SUNDAY
Mixing height 4500 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 10 - 18 mph.  Surface wind NNE to ENE at 9 - 15 mph.

MONDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind N to NE at 8 - 12 mph.  Surface wind NNW to NNE 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, December 4, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the WSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the WSW through NE in or near drainages leading to SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
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 12 miles to the SW through N in or near drainages leading to SSRAs.  Watch for shifting transport winds.  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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