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: Thursday, April 30, 2009       2:40 PM      Nick Yonker

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

Upper level trough is exiting eastward and giving way to a temporary ridge for tonight and Friday.  However, the next upper low and front will move up from the southwest later Friday bringing an increased chance of moisture Friday evening.  Air mass will stabilize during the morning under the ridge but afternoon heating will provide good mixing.  Wind flow will turn offshore and provide decent smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Upper level low moves in Saturday and weakens but will still produce some scattered showers over the region.  Showers decrease on Sunday, and then another trough and front move in Monday.  This promises to be a stronger system, bringing fairly breezy conditions as well.  Air mass will be mostly unstable during the afternoon and somewhat stable during the morning.  Expect decent smoke dispersion.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers below 1000 ft during the evening.

Transport wind ESE to SSE at 10 - 16 mph.

Surface wind ESE to S at 6 - 12 mph.

OUTLOOK:

SATURDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SSW to WSW at 10 - 16 mph during the morning becoming SSW to SW at 12 - 24 mph during the afternoon.  Surface wind SSE to SW at 6 - 10 mph.

SUNDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind WSW to WNW at 10 - 18 mph.  Surface wind WSW to WNW at 9 - 15 mph.

MONDAY
Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 12 - 22 mph during the morning becoming S to SSW at 15 - 30 mph during the afternoon.  Surface wind SSE to SSW at 9 - 15 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 Friday, May 1, 2009.
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Avoid ignitions within 12 miles to the ESE through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the ESE through SW 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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