SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

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

ISSUED: Sunday, June 20, 2010       2:35 PM      Jim Little

1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638



    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 with a chance of a light shower.  There will be enough 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

Zone 630 and 632:
Mixing height 2700 - 3700 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2800 - 3800 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NW to N at 8 - 12 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 8 - 12 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height 2700 - 3700 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2000 - 3000 ft during the evening.

Transport wind SW to WNW at 6 - 10 mph throughout the day.

Surface wind SW to WNW at 6 - 10 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 4300 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

WEDNESDAY
Mixing height 2800 to 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY
Mixing height below 1000 ft early rising to 2000 to 3000 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 NORTHEAST OREGON ZONES 630-638
    The following considerations should be adhered to in addition to
    the requirements of the Oregon Smoke Management Plan. These
    Instructions are valid for burning conducted on Monday, June 21, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the W through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.

Zone 633 - 638:
Avoid ignitions within 12 miles to the SW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSW through NNW in or near drainages leading to SSRAs.

    =========================================================
4.  SPECIAL NOTE:

    The smoke management forecaster is available at (503)-
    945-7401. Please call this number and not individual's
    numbers to discuss daily burning.  For large burns (over
    2000 tons) or burns extending over a considerable period,
    please request a special forecast.  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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