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: Friday, April 24, 2009       2:40 PM      Nick Yonker

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

Cool, NW'erly flow aloft will remain over the region through this weekend.  A minor disturbance will move through the flow but expect mostly just clouds with a slight chance of some scattered showers.  Air mass will remain mostly unstable and wind flow mainly NW'erly.  Expect continued good smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Upper level flow turns more northerly aloft through the period.  An upper low will drop southward on Monday and increase the chance of showers mainly on Tuesday.  Air mass will remain mostly unstable during the day with minor stability at night.  Wind flow will turn a little more northerly.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 3300 - 4300 ft during the evening.

Transport wind WNW to NW at 10 - 18 mph during the morning.  Transport wind increases to WNW to NW at 12 - 24 mph during the afternoon and evening.

Surface wind W to NW at 5 - 9 mph during the morning.  Surface wind increases to W to NW at 10 - 20 mph during the afternoon and evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind NW to N at 6 - 10 mph.  Surface wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 3300 - 4300 ft by late morning rising above 5000 ft during the afternoon.  Transport wind N to NE at 6 - 12 mph.  Surface wind NNE to ENE at 4 - 8 mph.

TUESDAY
Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NW to N at 5 - 9 mph.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Saturday, April 25, 2009.
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Avoid ignitions within 10 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the WNW through N in or near drainages leading to SSRAs.

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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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