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: Saturday, November 21, 2009       2:40 PM      Nick Yonker

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

Cold front and upper level trough are racing toward the state today and will bring increasing moisture to the region tonight.  Snow level will rise briefly to near 5000 ft overnight before dropping to the valley floors on Sunday.  Air mass will remain unstable through Sunday with excellent smoke dispersion.  Upper level trough moves through Sunday morning before a ridge builds in Sunday afternoon and evening.  Expect excellent smoke dispersion through Sunday.

    OUTLOOK (MONDAY - WEDNESDAY):

Upper level ridge continues to build in on Monday and will hold through Wednesday.  Air mass will become quite stable and smoke dispersion poor through the period.  Expect mostly sunny skies.

2.  DISPERSION

SUNDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 3000 - 4000 ft during the evening.

Transport wind W to NW at 18 - 30 mph during the morning.  Transport wind decreases to W to WNW at 15 - 25 mph during the afternoon and evening.

Surface wind W to WNW at 12 - 22 mph during the morning.  Surface wind decreases to WSW to WNW at 9 - 15 mph during the afternoon and decreases to SW to WNW at 5 - 9 mph during the evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 1200 - 2200 ft by late morning rising to 1800 - 2800 ft during the afternoon.  Transport wind SSW to W at 5 - 9 mph.  Surface wind light and variable.

TUESDAY
Mixing height below 1000 ft early rising to 1000 - 1700 ft by late morning and through the afternoon.  Transport wind SE to S at 4 - 8 mph.  Surface wind light and variable during the morning becoming SE to S at 5 - 9 mph during the afternoon.

WEDNESDAY
Mixing height below 1000 ft during the morning rising to 1000 - 2000 ft during the afternoon.  Transport wind SE to SSW at 6 - 10 mph.  Surface wind light and variable during the morning becoming SE to S at 4 - 8 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 Sunday, November 22, 2009.
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Avoid ignitions within 10 miles to the WSW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SW through NW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.

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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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