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

[ODF Smoke Management Instructions]

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

ISSUED: Sunday, October 18, 2009       2:40 PM      Jim Little

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

An upper level disturbance tracks across the Pacific Ocean and into northern California during the day.  Scattered showers will continue and smoke dispersal conditions will be marginal.

   OUTLOOK (TUESDAY-THURSDAY)


Weather conditions will be dry Tuesday.  Transport flow will be variable becoming westerly later in the day.  Mixing heights will be suppressed and smoke dispersal conditions will be marginal.  A weakening front brings scattered showers to the region Wednesday afternoon and evening.  High pressure returns Thursday for light winds and suppressed mixing heights.   Smoke dispersal conditions will be poor.  Recommend not planning units near smoke sensitive areas for Thursday.

2.  DISPERSION

MONDAY
Mixing height 2100 - 3100 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind SW to WSW at 13 - 25 mph during the morning.  Transport wind decreases to W to NW at 6 - 10 mph during the afternoon and evening.

Surface wind SW to WSW at 10 - 18 mph during the morning.  Surface wind shifts to W to NW and decreases to 4 - 8 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 1700 - 2700 ft by late morning rising to 2500 - 3500 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to W at 4 - 8 mph during the afternoon.  Surface wind light and variable.

WEDNESDAY
Mixing height below 1000 ft during the morning rising to 2100 - 3100 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning rising to 2000 - 3000 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 Monday, October 19, 2009.
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Avoid ignitions within 15 miles to the SW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  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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