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: Wednesday, May 13, 2009       2:40 PM      Nick Yonker

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

Upper level trough is driving a front into the region today.  Expect an increasing chance of moisture this afternoon and evening.  The trough will follow early Thursday then move by to the east Thursday afternoon with showers decreasing.  An upper level ridge will start building in Thursday evening, clearing skies and starting the stabilization process.  Expect good smoke dispersion Thursday under good mixing and brisk westerly flow.

    OUTLOOK (FRIDAY - SUNDAY):

Upper level ridge builds in strongly beginning Friday and lasting through the weekend.  Expect warming temperatures and sunny skies.  Air mass will stabilize during the night and morning hours but then destabilize during the afternoon.  Wind flow turns light northerly.  Expect mostly fair smoke dispersion.

2.  DISPERSION

THURSDAY
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 3000 - 4000 ft during the evening.

Transport wind WSW to WNW at 14 - 28 mph during the morning and afternoon.  Transport wind decreases to WNW to NNW at 10 - 20 mph during the evening.

Surface wind SSW to WSW at 10 - 20 mph during the morning.  Surface wind shifts to W to WNW at 12 - 22 mph during the afternoon then decreases to WNW to NW at 8 - 12 mph during the evening.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4300 - 5000 ft during the afternoon.  Transport wind ENE to ESE at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

SATURDAY
Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind ESE to S at 5 - 9 mph during the morning becoming SSW to WSW at 4 - 8 mph during the afternoon.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Thursday, May 14, 2009.
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Avoid ignitions within 10 miles to the WSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles in all directions of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.

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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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