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: Friday, December 4, 2009       2:40 PM      Nick Yonker

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

Dry cold front and trough will drop down from the north this evening and bring cooling temperatures aloft.  Air mass will destabilize Saturday as the cooler air moves in.  Expect mostly fair skies with chilly northerly winds.  Smoke dispersion will become mostly good by late morning to early afternoon on Saturday.

    OUTLOOK (SUNDAY - TUESDAY):

Another more arctic-like front will drop southward Saturday night to Sunday morning bringing very cold temperatures and the chance of some light snow or snow flurries Sunday.  Cold pool of air settles over the state for the rest of the period as the upper level low slowly moves to the south of the region.  Decreasing offshore wind flow and warming aloft while temperatures remain cold near the surface, will slowly stabilize the air mass again.  Smoke dispersion will be the best Sunday then worsen Monday and Tuesday.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 2000 - 3000 ft during the evening.

Transport wind N to NE at 10 - 18 mph.

Surface wind N to NE at 8 - 14 mph.

OUTLOOK:

SUNDAY
Mixing height 3000 - 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NE to E at 10 - 16 mph during the morning becoming NE to ENE at 14 - 28 mph during the afternoon.  Surface wind NE to E at 6 - 10 mph during the morning becoming NE to ENE at 10 - 20 mph during the afternoon.

MONDAY
Mixing height 3500 - 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NE to E at 8 - 12 mph.  Surface wind NE to ESE at 6 - 10 mph.

TUESDAY
Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 2700 - 3700 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Saturday and Sunday, December 5 and 6, 2009.
==================================================================

For Saturday:

Avoid ignitions within 12 miles to the N through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the N through E in or near drainages leading to SSRAs.  No additional restrictions necessary.

For Sunday:

Avoid ignitions within 10 miles to the NE through E of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the NNE through E in or near drainages leading to SSRAs.  No additional restrictions necessary.

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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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