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, December 17, 2009       2:40 PM      Nick Yonker

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

Upper level ridge is building over the region today as a warm front moves in from the coast.  Very little, if any, moisture is expected from the front.  Cold front will follow Friday morning.  Again, moisture amounts will be minimal as the front dissipates as it moves in.  Front will do little damage to the upper ridge which will quickly pop up again Friday evening.  Air mass will remain mostly stable with fair smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Next warm front will move into the ridge Saturday afternoon and evening bringing some light moisture by nightfall.  Cold front and trough will approach on Sunday increasing the chance of moisture and increasing the wind.  The first cold front should move through overnight Sunday/Monday with a second one moving in late Monday.  Air mass will be quite stable Saturday with poor smoke dispersion.  Mixing and dispersion improve Sunday and Monday.

2.  DISPERSION

FRIDAY
Mixing height 1000 - 1800 ft during the morning.  Afternoon mixing height rises to 1700 - 2700 ft then lowers to 1000 - 1800 ft during the evening.

Transport wind S to SW at 9 - 15 mph.

Surface wind S to SW at 5 - 9 mph.

OUTLOOK:

SATURDAY
Mixing height 1000 - 1700 ft during the morning rising to 2000 - 3000 ft during the afternoon.  Transport wind SSW to SW at 8 - 14 mph during the morning becoming SSW to SW at 12 - 22 mph during the afternoon.  Surface wind S to SW at 5 - 9 mph.

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.

MONDAY
Mixing height 3500 - 4500 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind S to SW at 15 - 25 mph during the morning becoming S to SSW at 18 - 32 mph during the afternoon.  Surface wind SSE to SSW at 10 - 18 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, December 18, 2009.
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Avoid ignitions within 15 miles to the S through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the S through W in or near drainages leading to SSRAs.  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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