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: Monday, April 13, 2009       2:35 PM      Jim Little

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

An upper level low remains over the region Tuesday for numerous rain and snow showers.  Mixing heights will be high for good to excellent smoke dispersal conditions.  Transport winds will be generally southwesterly except northwesterly over the Grande Ronde and Baker Valleys.

    OUTLOOK (WEDNESDAY - FRIDAY):

An upper level ridge approaches the Pacific Northwest on Wednesday and will be over the region Thursday and Friday.  Transport winds will be mostly west through northwesterly Wednesday and then light and variable with the upper ridge Thursday and Friday.  Warmer air aloft with the ridge will suppress mixing heights for deteriorating smoke dispersal conditions.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.

Transport wind NW to NNW at 10 - 18 mph during the morning and afternoon.  Transport wind increases to NW to NNW at 15 - 29 mph during the evening.

Surface wind NW to NNW at 10 - 16 mph during the morning.  Surface wind increases to NW to NNW at 12 - 24 mph during the afternoon then decreases to NW to NNW at 8 - 14 mph during the evening.

Zone 633 - 638:
Mixing height above 5000 ft throughout the day.

Transport wind NW to N at 15 - 25 mph throughout the day.

Surface wind NW to NNW at 12 - 24 mph during the morning.  Surface wind increases to NW to NNW at 15 - 29 mph during the afternoon then decreases to NW to NNW at 10 - 20 mph during the evening.

OUTLOOK:

WEDNESDAY
Mixing height 3300 to 4300 ft during the morning rising above 5000 ft during the afternoon.  In the west transport wind NNW to N at 18 - 32 mph.  In the east transport wind NNW to N at 24 - 42 mph.  In the west surface wind WNW to NW at 8 - 14 mph during the morning becoming NW to N at 10 - 20 mph during the afternoon.  In the east surface wind NW to NNW at 14 - 24 mph.

THURSDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to N at 12 - 24 mph.  Surface wind NNW to N at 13 - 25 mph during the morning becoming NNW to NNE at 10 - 18 mph during the afternoon.

FRIDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable during the morning becoming NW to N at 4 - 8 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 Tuesday, April 14, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the NW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the NW through N in or near drainages leading to SSRAs.  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 NW through N 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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