SMI South Central (Smoke Management Instructions) South Central Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Sunday, November 15, 2009       2:40 PM      Jim Little

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

A Pacific cold front will stall in western Oregon during the day on Monday leaving areas east of the Cascades dry.  Warm southerly flow will stabilize conditions and mixing heights will be somewhat suppressed.  Smoke dispersal conditions should be marginal to fair with a generally southerly flow for transport winds.

    OUTLOOK (TUESDAY - THURSDAY):

By Tuesday some rain crosses the Cascades as a cold front moves east.  Atmospheric stability will decrease for better smoke dispersal conditions.  Wednesday will be dry but high mixing heights will continue.  Thursday another Pacific cold front moves into western Oregon with rain spreading to east of the Cascades during the day.  Expect good to excellent smoke dispersal conditions through the outlook period.

2.  DISPERSION

MONDAY
Mixing height 2000 - 3000 ft during the morning.  Afternoon mixing height rises to 3000 - 4000 ft then lowers to 2000 - 3000 ft during the evening.

Transport wind SSE to SSW at 10 - 20 mph.

Surface wind SSE to SSW at 10 - 20 mph during the morning.  Surface wind decreases to SSE to SSW at 8 - 12 mph during the afternoon and evening.

OUTLOOK:

TUESDAY
Mixing height 2200 - 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 12 - 22 mph.  Surface wind SSW to WSW at 9 - 15 mph.

WEDNESDAY
Mixing height 4500 - 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 10 - 20 mph during the morning becoming SW to W at 9 - 15 mph during the afternoon.  Surface wind WSW to NW at 6 - 10 mph.

THURSDAY
Mixing height 4500 - 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 6 - 10 mph.  Surface wind SSW to WSW at 5 - 9 mph.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Monday, November 16, 2009.
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Avoid ignitions within 12 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through WSW 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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