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 14, 2010       2:40 PM      Jim Little

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

    TUESDAY

An upper level low drops in from the northwest during the day Tuesday.  Skies will be partly to mostly cloudy with scattered showers.  Relatively cool air aloft will destabilize the atmosphere and help push maximum mixing heights to above 5000 feet.  This will give generally good smoke dispersal conditions to the region.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper low moves southeast into southern Idaho on Wednesday.  Cooler daytime temperatures will limit maximum mixing heights a bit but smoke dispersal conditions should be at least fair to good most areas.  There will still be enough moisture for some scattered showers.  By Thursday the upper level low will move east northeast into south-central Canada but some troughiness will hold back across the Pacific Northwest.  Friday looks dry but partly to mostly cloudy.  Mixing heights both Thursday and Friday should be quite high yielding generally good smoke dispersal conditions.

2.  DISPERSION

TUESDAY
Mixing height 3200 - 4200 ft during the morning.  Mixing height rises above 5000 ft during the afternoon and evening.

Transport wind NNW to NNE at 4 - 8 mph during the morning and afternoon.  Transport wind increases to NNW to NNE at 19 - 33 mph during the evening.

Surface wind NNW to NNE at 5 - 9 mph during the morning and afternoon.  Surface wind increases to NNW to NNE at 13 - 25 mph during the evening.

OUTLOOK:

WEDNESDAY
Mixing height 3300 - 4300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to N at 12 - 24 mph.  Surface wind NW to N at 10 - 18 mph.

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 2800 - 3800 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 Tuesday, June 15, 2010.
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Avoid ignitions within 10 miles to the WNW through NNE of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  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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