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: Monday, April 27, 2009       2:35 PM      Jim Little

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

An upper level disturbance dropping southward from British Columbia on Monday will develop into an upper level low over the Pacific Northwest on Tuesday.  This will produce periods of rain throughout the day for most of the area.  The rain will taper off later in the day, but showers are likely through Wednesday.  With the cooler air aloft the atmosphere will be rather unstable and mixing heights should be favorable for good smoke dispersal.  Expect transport winds to be generally from the northwest.

    OUTLOOK (WEDNESDAY - FRIDAY):

The upper low drifts slowly eastward across the state on Wednesday.  Showers will continue throughout the day.  Mixing heights will remain high, transport winds generally north through northeast.  By Thursday the upper low will pass to the east allowing weak ridging to build over the area.  Weather should be dry. Transport winds northwesterly.  On Friday a Pacific weather system moves toward the state from the southwest.  This will increase clouds but any rain should hold off until the weekend with the heaviest amounts on Sunday.


2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind WNW to NW at 15 - 29 mph during the morning.  Transport wind decreases to W to NW at 10 - 22 mph during the afternoon and evening.

Surface wind WNW to NNW at 6 - 10 mph throughout the day.

Zone 633 - 638:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind WNW to NW at 12 - 24 mph during the morning and afternoon.  Transport wind decreases to WNW to NNW at 8 - 12 mph during the evening.

Surface wind NW to NNW at 8 - 12 mph during the morning and afternoon.  Surface wind decreases to WNW to NNW at 6 - 10 mph during the evening.

OUTLOOK:

WEDNESDAY
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 N to NE at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 9 - 15 mph during the afternoon.

THURSDAY
Mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 9 - 15 mph during the morning becoming NW to N at 12 - 24 mph during the afternoon.  Surface wind NNW to NNE at 10 - 16 mph during the morning becoming NW to N at 12 - 24 mph during the afternoon.

FRIDAY
Mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 9 - 15 mph during the morning becoming light and variable during the afternoon.  Surface wind NNW to NNE at 10 - 16 mph during the morning becoming light and variable during the afternoon.

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 Tuesday, April 28, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the W through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the W through NNW in or near drainages leading to SSRAs.

Zone 633 - 638:
Avoid ignitions within 12 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the WNW through NNE 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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