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: Friday, October 15, 2010       2:35 PM      Pete Parsons



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



SATURDAY



The upper-level flow is forecast to turn southwesterly, as a splitting weak trough approaches the coastline.  It will spread some clouds across the region but not likely any precipitation.  Some sunshine will warm surface temperatures enough for fair to good afternoon mixing, with light onshore transport winds.


OUTLOOK (SUNDAY-TUESDAY)


An upper-level trough is forecast to split apart, as is moves onshore, with the main portion of it dropping southward, across California and Nevada, Sunday through Tuesday.  An upper-level ridge is forecast to build over Oregon for continued dry conditions.  Warming aloft will combine with October's lowering sun angle to strengthen overnight surface-based inversions.  Afternoon smoke dispersal conditions will deteriorate each day, becoming marginal to poor Monday and Tuesday.



2.  DISPERSION



SATURDAY

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.  Afternoon mixing height rises to 3800 - 4800 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WSW to WNW at 6 - 10 mph during the afternoon then becomes light and variable during the evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 1400 to 2400 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



MONDAY

Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 2700 to 3700 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2700 to 3700 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



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 Saturday, October 16, 2010.

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



Delay ignitions until 10 a.m.  Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 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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