SMI Northeast (Smoke Management Instructions) (no subject)

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Sun Nov 14 15:10:56 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Sunday, November 14, 2010       2:35 PM      Jim Little



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


    MONDAY
Upper air charts show a high pressure area centered about 600 miles west of San Francisco and an upper level disturbance moving across the top of the high into British Columbia.  This helps maintain a weak warm front that moves over the Pacific Northwest.  Upper level winds will be northwesterly.  Warmer air aloft with the warm front will stabilize the atmosphere for reduced maximum mixing heights.  Look for marginal smoke dispersal conditions.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
The upper disturbance moves British Columbia and northern Washington early Tuesday - cooler temperatures aloft behind this system will allow for higher maximum mixing heights and improved ventilation conditions. Transport winds will be generally west southwest to west northwest.
By Wednesday a deep low in the Gulf of Alaska, both at the surface and aloft, begins to influence weather in the Pacific Northwest.  Winds turn southerly both at the surface and aloft.  A surface cold front moves into western Washington then drops south into northwest Oregon by afternoon but rain will hold off until Thursday.  Expect south-southwesterly transport winds Wednesday, becoming light on Thursday but still favoring southwesterly.

2.  DISPERSION



MONDAY



Zone 630 and 632:



Maximum mixing height 2500 feet.



Transport wind WNW to NNW at 15 - 25 mph during the morning and afternoon.  Transport wind increases to WSW to WNW at 21 - 37 mph during the evening.



Surface wind WNW to NNW at 10 - 16 mph throughout the day.



Zone 633 - 638: Maximum mixing height 2500 feet.



Transport wind WSW to WNW at 10 - 16 mph during the morning and afternoon.  Transport wind increases to WSW to WNW at 18 - 30 mph during the evening.



Surface wind SW to WNW at 6 - 12 mph during the morning and afternoon.  Surface wind increases to WSW to W at 12 - 22 mph during the evening.





OUTLOOK:



TUESDAY

Mixing height 3200 to 4200 ft during the morning rising to 4100 to 5000 ft during the afternoon.  Transport wind W to WNW at 22 - 38 mph during the morning becoming WNW to NW at 13 - 25 mph during the afternoon.  Surface wind WSW to WNW at 16 - 26 mph during the morning becoming W to NW at 10 - 18 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft during the morning rising to 2000 to 3000 ft during the afternoon.  Transport wind SE to SSW at 4 - 8 mph.  Surface wind SE to SSW at 4 - 8 mph.



THURSDAY

Mixing height 1800 to 2800 ft during the morning rising to 2500 to 3500 ft during the afternoon.  Transport wind SW to W at 6 - 10 mph during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.  Surface wind SW to W at 4 - 8 mph 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 Monday, November 15, 2010.

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



Zone 630 and 632:

Delay ignitions until 10:ooam.  Avoid ignitions within 15 miles to the WSW through NW of SSRAs.



Zone 633 - 638:

Delay ignitions until 10:00am.  Avoid ignitions within 15 miles to the WSW through WNW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.



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

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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