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: Sunday, June 27, 2010       2:35 PM      Jim Little

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

    MONDAY

An upper level low will drift to within about 300 miles west of the NW tip of Vancouver Island.  Upper flow will be from the SW over Oregon.  A very weak, but mostly dry, front will push into NW Oregon but any moisture should stay well north of central or northeast Oregon.  Skies will be mostly sunny and temperatures generally 4 to 8 degrees above average.  Warm surface temperatures should help push maximum mixing heights to above 5000 feet most areas.

    OUTLOOK (TUESDAY-THURSDAY)

The upper low moves into southern British Columbia and the air mass continues to cool on Tuesday.  Temperatures drop to near average.  Smoke dispersal conditions remain good.  Wednesday and Thursday will see the upper low pull out into central Canada, leaving a cool trough over the region.  Temperatures will drop to about 3 to 8  degrees below average Wednesday and 5 to 10 degrees below average on Thursday.  However, the cool air aloft should help maximum afternoon mixing heights to near 5000 feet most areas for good smoke dispersal conditions depending on wind direction.


2.  DISPERSION

MONDAY

Zone 630 and 632:
Mixing height 3600 - 4600 ft during the morning.  Mixing height rises above 5000 ft during the afternoon and evening.

Transport wind W to NW at 4 - 8 mph during the morning.  Transport wind increases to WNW to NW at 10 - 22 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NW at 10 - 22 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 2500 - 3500 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to W to NW at 6 - 10 mph during the afternoon and increases to WNW to NW at 12 - 24 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NW at 8 - 12 mph during the afternoon and increases to WNW to NW at 12 - 24 mph during the evening.

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 5 - 9 mph during the morning becoming WNW to NW at 12 - 22 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NW at 12 - 22 mph during the afternoon.

WEDNESDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 4 - 8 mph during the morning becoming NW to NNW at 8 - 12 mph during the afternoon.  Surface wind WNW to NNW at 4 - 8 mph.

THURSDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 6 - 12 mph.  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 Monday, June 28, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the W through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the W through NW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.

Zone 633 - 638:
Avoid ignitions within 10 miles to the W through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the W through NW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.

    =========================================================
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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