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: Friday, October 23, 2009       2:35 PM      Nick Yonker

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

Cold front is moving into the region this afternoon bringing some light rain to the region.  Front will move through later this evening.  An upper level ridge will quickly rebuild tomorrow, stabilizing the air mass and reducing wind flow.  Expect a fair and dry day on Saturday.  Smoke dispersion will decrease considerably from today under the building ridge.

    OUTLOOK (SUNDAY - TUESDAY):

Upper ridge will remain over the state Sunday but a warm front will overrun it, bringing another round of moisture late Sunday.  Air mass will remain stable but smoke dispersion will improve as SW'erly flow increases.  The trailing cold front will move through on Monday bringing a good shot of moisture and cooler, unstable conditions.  Upper trough moves through later Monday with chilly northerly flow following on Tuesday.  Showers decrease.  Snow level will lower to near 3000 ft by early Tuesday.  Expect plenty of snow in the mountains from this system.  Mixing and smoke dispersion will be mostly excellent Monday and Tuesday.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.  Afternoon mixing height rises to 3300 - 4300 ft then lowers below 1000 ft during the evening.

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

Surface wind W to NW at 7 - 12 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to W at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W at 4 - 8 mph during the afternoon.

MONDAY
Mixing height 3200 to 4200 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind W to WNW at 15 - 25 mph.  Surface wind WSW to WNW at 12 - 22 mph.

TUESDAY
Mixing height 4500 to 5000 ft throughout the day.  Transport wind WNW to NNW at 10 - 20 mph.  Surface wind WNW to NW 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 Saturday, October 24, 2009.
    ==================================================================

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 25 miles to the W through NNE in or near drainages leading to SSRAs.  Complete ignitions by 4 p.m.

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