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, June 16, 2010       2:40 PM      Jim Little

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

    THURSDAY

The upper low that has been plaguing the Pacific Northwest the past few days weakens and moves east but upper troughiness remains over the region on Thursday.  There will be a slight chance of mainly afternoon showers.  Temperatures continue below average for the time of year.  Afternoon mixing heights should push high enough for good smoke dispersal conditions.

    OUTLOOK (FRIDAY-SUNDAY)

A broad trough remains over the region throughout the outlook period.  There will be a slight chance of mainly afternoon showers each day throughout the outlook period - lowest chance on Friday, highest chance on Saturday.  Temperatures continue below average for the time of year.  None the less, there should be enough sunshine to warm surface temperatures enough that, combined with the cool air aloft, mixing heights will be pushed high enough during the afternoon for good smoke dispersal conditions.

2.  DISPERSION

THURSDAY
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.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable 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 8 - 12 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
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 Thursday, June 17, 2010.
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Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of 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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