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

ODF Smoke Management Instructions smi_south_central at listsmart.osl.state.or.us
Sun Jun 20 15:56:04 PDT 2010


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

ISSUED: Sunday, June 20, 2010       2:40 PM      Jim Little

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

    MONDAY

The upper low that brought clouds and light rain to the region Sunday moves northeast and is over Montana by Monday.  Expect a mixture of sunshine and clouds.  There will be enough surface heating to push mixing heights to 5000 feet or better for good smoke dispersal conditions most areas.

    OUTLOOK (TUESDAY-THURSDAY)

There will be a drier and warmer air mass over the region on Tuesday.  Again, daytime heating pushes mixing heights to 5000 feet or above for good smoke dispersal conditions. On Wednesday a broad upper trough approaches the Pacific Northwest turning upper flow southwesterly.  Expect dry weather and good smoke dispersal conditions.  On Thursday flow aloft is west-northwesterly.  Very minor impulses moving through the flow should not have much effect on the region.

2.  DISPERSION

MONDAY
Mixing height 3400 - 4400 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain.  Transport wind increases to NNE to ENE at 6 - 10 mph during the evening.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming S to SW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming S to SW at 5 - 9 mph during the afternoon.

WEDNESDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY
Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning rising above 5000 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 Monday, June 21, 2010.
==================================================================

Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.

==============================================================
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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