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: Thursday, October 1, 2009       2:35 PM      Nick Yonker

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

Flat ridge over the state today is keeping skies mostly fair but an upper level trough will develop to the northwest and move in on Friday.  Expect increasing clouds with a chance of some light showers.  Because the system is dropping down from the northwest, moisture will be light and limited.  Cooler temperatures will follow Friday evening with the snow level dropping down to near 5000 ft.  Air mass will remain mostly unstable, and with increasing NW flow during the afternoon, will make for good smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Upper level low continues to drop southward Sunday and forms into a chilly upper level low over the state.  This low will gradually slip to the southeast Sunday leaving the region under chilly northerly to offshore flow through Monday.  Air mass will remain mostly unstable except for brief late night and early morning stability.  Air mass will dry Monday as moisture moves off to the east with the low and a high pressure ridge noses in from the west.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 3800 - 4800 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2500 - 3500 ft during the evening.

Transport wind SSW to W at 6 - 10 mph during the morning.  Transport wind shifts to NW to NNW and increases to 10 - 20 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NNW at 8 - 14 mph during the afternoon then decreases to WNW to NNW at 5 - 9 mph during the evening.

OUTLOOK:

SATURDAY
Mixing height 4000 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 8 - 14 mph.  Surface wind light and variable during the morning becoming NW to NNW at 8 - 14 mph during the afternoon.

SUNDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 10 - 16 mph.  Surface wind NW to NNE at 5 - 9 mph.

MONDAY
Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNE to NE at 10 - 16 mph.  Surface wind N to NE at 8 - 12 mph.

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 Friday, October 2, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the SW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the SW through N in or near drainages leading to SSRAs.  Watch for shifting transport winds.  No additional restrictions necessary.

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