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: Monday, June 21, 2010       2:40 PM      Jim Little

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

    TUESDAY

A weak upper level ridge slowly moves east over the region during the day on Tuesday.  Weather will be dry and skies mostly sunny across the region.  Mixing heights will climb to 5000 feet or above for good smoke dispersal conditions.

    OUTLOOK (WEDNESDAY-FRIDAY)

The weak upper ridge moves east and is replaced by southwesterly flow aloft on Wednesday.  A disturbance in the SW flow aloft may produce afternoon thunderstorms over the Cascades and into central Oregon, especially in the afternoon.  Maximum mixing heights will continue above 5000 feet for good smoke dispersal conditions throughout the outlook period. Skies will be partly cloudy Wednesday through Friday.  On Friday a cool northwesterly flow aloft develops.  Temperatures will generally be near to slightly below average.


2.  DISPERSION

TUESDAY
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to SSW to WSW at 6 - 10 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SSW to WSW at 5 - 9 mph during the afternoon then becomes light and variable during the evening.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 4300 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to S at 8 - 14 mph during the morning becoming SW to WSW at 12 - 22 mph during the afternoon.  Surface wind SE to SSW at 4 - 8 mph during the morning becoming SSW to WSW at 10 - 18 mph during the afternoon.

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

FRIDAY
Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  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 Tuesday, June 22, 2010.
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Avoid ignitions within 12 miles to the SE through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SE through W in or near drainages leading to SSRAs.  Complete ignitions by 4:00pm.

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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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