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: Thursday, September 30, 2010       2:35 PM      Pete Parsons



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



    FRIDAY



A strong upper-level ridge will remain over the Pacific Northwest but shift slightly eastward.  The surface thermal trough is forecast to shift east of the Cascades with light transport winds. Suppressed mixing heights and light transport winds will make for marginal ventilation conditions.


    OUTLOOK (SATURDAY-MONDAY)


The upper-level ridge will weaken and continue to slowly shift eastward.  Transport winds are expected to remain light Saturday, and then turn increasing onshore Sunday, as an upper-level trough, and corresponding cold front, approach the coastline.  That will improve ventilation conditions. Showers are likely Sunday night and Monday, with the passage of an upper-level trough.



2.  DISPERSION



FRIDAY

Mixing height below 500 ft early rising to 2200 - 3200 ft by late morning.  Afternoon mixing height rises to 3000 - 4000 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.  Transport wind increases to NNW to NNE at 6 - 10 mph during the evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph during the morning becoming WSW to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to NW at 4 - 8 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph during the morning becoming WNW to NW at 10 - 20 mph during the afternoon.  Surface wind WSW to WNW at 6 - 10 mph during the morning becoming WNW to NW 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 Friday, October 1, 2010.

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



Delay ignitions until 11 a.m.  Avoid ignitions within 20 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 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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