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, December 16, 2009       2:40 PM      Nick Yonker

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

Moist and mild SW'erly jet stream will continue to bring frontal systems into the region.  A warm front will move in tomorrow but expect mostly just clouds.  A cold front will approach late Thursday.  Mild air mass aloft will keep mixing heights rather low.  Expect mostly fair smoke dispersion.

    OUTLOOK (FRIDAY - SUNDAY):

Cold front will move through and dissipate on Friday.  Next warm front arrives on Saturday then will be followed by a cold front on Sunday.  Air mass will remain somewhat stable through the period under mild air aloft.  Smoke dispersion will be generally fair through the period, varying as fronts move through.

2.  DISPERSION

THURSDAY
Mixing height below 1000 ft early rising to 1200 - 2200 ft by late morning.  Afternoon mixing height rises to 1700 - 2700 ft then lowers to 1000 - 1700 ft during the evening.

Transport wind S to SW at 6 - 12 mph during the morning and afternoon.  Transport wind increases to SSE to SSW at 10 - 20 mph during the evening.

Surface wind light and variable and controlled by local terrain through the day.  Surface wind increases to SE to SSW at 5 - 9 mph during the evening.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning rising to 1700 - 2700 ft during the afternoon.  Transport wind SSW to SW at 8 - 14 mph.  Surface wind light and variable.

SATURDAY
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning rising to 2000 - 3000 ft during the afternoon.  Transport wind SSE to SSW at 5 - 9 mph.  Surface wind light and variable during the morning becoming SE to SSW at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 1300 - 2300 ft by late morning rising to 3000 - 4000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph.  Surface wind SE to SSW at 6 - 12 mph during the morning becoming SSE to SSW at 10 - 18 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 Thursday, December 17, 2009.
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Avoid ignitions within 15 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSE through W 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.

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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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