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, June 6, 2010       2:40 PM      Jim Little

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

    MONDAY

The weather system that brought rain to much of the Pacific Northwest Sunday is well to the east and dissipating by Monday.  There will be slight ridging aloft and surface high pressure centered offshore.  Skies will be generally partly cloudy to mostly sunny.  Look for good mixing heights for generally fair to good smoke dispersal conditions.

    OUTLOOK (TUESDAY-THURSDAY)

Weak high pressure aloft develops over the region Thursday.  Expect mostly sunny skies and warmer temperatures. The warmer surface temperatures should push mixing heights to 5000 feet or above for generally good smoke dispersal conditions.  Another weather system brings rain back to the area spreading eastward Wednesday.  Amounts will be mostly less than a tenth of an inch.  Thursday will see some left-over showers.  Mixing heights will remain high Wednesday and Thursday for good smoke dispersal conditions.

2.  DISPERSION

MONDAY
Mixing height 2400 - 3400 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to N to NE at 5 - 9 mph during the afternoon and evening.

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

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 4200 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind E to SE at 4 - 8 mph during the morning becoming SSW to WSW at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 5 - 9 mph during the afternoon.

WEDNESDAY
Mixing height 1800 - 2800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY
Mixing height 3200 - 4200 ft during the 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 Monday, June 7, 2010.
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Avoid ignitions within 15 miles to the N through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the N through SE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  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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