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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Mon May 4 14:52:50 PDT 2009


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

ISSUED: Monday, May 4, 2009       2:35 PM      Jim Little

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

An upper level low remains in the Gulf of Alaska on Tuesday with a strong west to east upper flow over the eastern Pacific and the Pacific Northwest.  Post frontal showers will continue throughout the day.  Maximum mixing heights will be above 5000 feet for good smoke dispersal conditions and transport winds will be generally south through southwesterly.


    OUTLOOK (WEDNESDAY-FRIDAY):

A slow moving Pacific cold front will move across the region on Wednesday for periods of rain throughout the day.  Mixing heights will remain high and transport winds will be southwesterly becoming westerly later in the day.  On Thursday a strong westerly flow aloft continues, while at the surface high pressure begins to build west of California.  The surface high will be too distant to have much effect on Oregon weather with scattered showers continuing.  By Friday the surface high will finally begin to nose into the Pacific Northwest cutting off showers.  Low level transport winds will finally shift to more northerly by Friday.  Smoke dispersal conditions remain good.


2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.

Transport wind SW to W at 20 - 36 mph during the morning.  Transport wind decreases to WSW to W at 10 - 22 mph during the afternoon and decreases to W to NW at 5 - 9 mph during the evening.

Surface wind SW to WSW at 9 - 15 mph during the morning.  Surface wind shifts to WNW to NNW at 9 - 15 mph during the afternoon then decreases to WNW to NNW at 6 - 10 mph during the evening.

Zone 633 - 638:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 2200 - 3200 ft during the evening.

Transport wind SW to W at 13 - 25 mph during the morning.  Transport wind decreases to W to NW at 9 - 15 mph during the afternoon and decreases to WNW to NNW at 6 - 10 mph during the evening.

Surface wind ESE to S at 6 - 10 mph during the morning.  Surface wind shifts to NNW to NNE at 8 - 12 mph during the afternoon and evening.

OUTLOOK:

WEDNESDAY
In the west mixing height above 5000 ft throughout the day.  In the east mixing height 3900 to 4900 ft during the morning lowering to 3100 to 4100 ft during the afternoon.  Transport wind SSW to WSW at 10 - 18 mph during the morning becoming WSW to W at 14 - 28 mph during the afternoon.  Surface wind S to SW at 4 - 8 mph during the morning becoming NW to NNW at 10 - 18 mph during the afternoon.

THURSDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SSW to WSW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.

FRIDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NNW to NNE at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 9 - 15 mph 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, May 5, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the SW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the S through NW in or near drainages leading to SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
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 SSE through NNW in or near drainages leading to SSRAs.  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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