SMI South Central (Smoke Management Instructions) South Central Smoke Management Instructions

[ODF Smoke Management Instructions]

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

ISSUED: Sunday, April 12, 2009       2:40 PM      Jim Little

1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625

A weakening cold front moving through the region early Monday morning and will usher in a cool upper level trough that will bring showers to the area throughout the day. Transport winds will be westerly early, veering to more northwesterly later in the day.  Mixing heights will be quite high for good to excellent smoke dispersal conditions.

    OUTLOOK (TUESDAY - THURSDAY):

Showers linger in the area through Wednesday.  By Thursday an upper-level ridge moves in from the west for drier weather but lowering mixing heights and deteriorating smoke dispersal conditions.



2.  DISPERSION

MONDAY
Mixing height above 5000 ft throughout the day.

Transport wind W to NW at 10 - 18 mph during the morning.  Transport wind increases to W to NW at 15 - 25 mph during the afternoon and evening.

Surface wind SW to WNW at 6 - 12 mph during the morning.  Surface wind increases to W to NW at 12 - 24 mph during the afternoon then decreases to WNW to NNW at 10 - 16 mph during the evening.

OUTLOOK:

TUESDAY
Mixing height 4400 - 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to N at 15 - 29 mph.  Surface wind WNW to NNW at 9 - 15 mph during the morning becoming WNW to NW at 15 - 25 mph during the afternoon.

WEDNESDAY
Mixing height 4500 - 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 10 - 18 mph.  Surface wind WNW to NNW at 10 - 16 mph during the morning becoming SW to WSW at 10 - 22 mph during the afternoon.

THURSDAY
Mixing height 2500 - 3500 ft during the morning and through the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming W to WNW at 12 - 22 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Monday, April 13, 2009.
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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 10 miles to the W 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.  No additional restrictions necessary.

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4.  SPECIAL NOTE:

    The smoke management forecaster is available at (503)
    945-7401.  The smoke management forecaster is available
    to discuss specific burns.  The duty forecaster phone
    number is (503) 945-7401. Please call this number and
    not individual's numbers to discuss daily burning. Please
    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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