SMI Northeast (Smoke Management Instructions) (no subject)

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Tue Nov 9 14:55:38 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, November 9, 2010       2:35 PM      Jim Little



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


    WEDNESDAY
The weather system that brought rain or snow to much of the region on Tuesday moves south and east on Wednesday while an upper level ridge builds to the west and slowly drifts over the Pacific Northwest.  The ridge should help stabilize the atmosphere and suppress maximum mixing heights.  Expect mostly cloudy skies and a few lingering showers.  Ventilation conditions will be mostly marginal and winds generally northwesterly.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper ridge moves through during the day Thursday.  Maximum mixing heights remain suppressed with poor to marginal smoke dispersal conditions.  Winds most areas will be light and variable becoming southerly later in the day.  On Friday a broad ridge again builds over the eastern Pacific and noses in over the Pacific Northwest.  Dryer weather and more sunshine will warm near-surface layers and push maximum mixing heights higher to improve ventilation conditions for both Friday and Saturday.





2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height 1600 - 2600 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind WNW to NNW at 6 - 12 mph during the morning and afternoon.  Transport wind decreases to NNW to NNE at 4 - 8 mph during the evening.



Surface wind WNW to NNW at 5 - 9 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



Zone 633 - 638:

Mixing height 1500 - 2500 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind W to NW at 5 - 9 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 4 - 8 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



THURSDAY

Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning and through the afternoon.  Transport wind SSE to SSW at 5 - 7 mph during the morning becoming S to SW at 12 - 24 mph during the afternoon.  Surface wind light and variable during the morning becoming SSE to SW at 6 - 12 mph during the afternoon.



FRIDAY

Mixing height 1000 to 2000 ft during the morning rising to 2500 to 3500 ft during the afternoon.  Transport wind W to NW at 4 - 8 mph during the morning becoming NW to N at 4 - 8 mph during the afternoon.  Surface wind W to NW at 4 - 8 mph during the morning becoming NW to N at 4 - 8 mph during the afternoon.



SATURDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2500 to 3500 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 4 - 8 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 Wednesday, November 10, 2010.

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



Zone 630 and 632:

Avoid ignitions within 15 miles to the WNW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2:30pm.



Zone 633 - 638:

Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2:30pm.



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

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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