SMI Northeast (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, October 19, 2010       2:35 PM      Jim Little



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


    WEDNESDAY
A slow transition out of the sunny and dry weather pattern of the past few days begins on Wednesday - but slow is the operative word here.  An upper low continues in the vicinity of southern California and a ridge of high pressure over the Pacific Northwest is shunting weather systems well to the north.  The upper ridge will edge east during the day Wednesday. Maximum afternoon mixing heights will climb to around 3000 feet most areas but winds will be light and variable.  Expect a slight tendency to SSE but pay close attention to spot forecasts as wind directions will have little consistency across the region.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper ridge will have moved east by Thursday and an upper short wave will be approaching from the southwest.  This will increase cloudiness throughout the day.  Transport winds most areas will be from the south through southwest.  By Friday the region will be under southwesterly flow aloft.  There will be very limited moisture for some areas of light rain, but most areas should remain dry during the day. Afternoon mixing heights should climb to 5000 feet. On Saturday an active warm front/cold front combination will approach from the west.  Rain will be on the increase during the late afternoon with rain continuing Saturday night and Sunday.





2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height 1900 - 2900 ft during the morning.  Afternoon mixing height rises to 2500 - 3500 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.



Surface wind light and variable and controlled by local terrain.



Zone 633 - 638:

Mixing height 1000 - 2000 ft during the morning.  Afternoon mixing height rises to 2500 - 3500 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.  Transport wind increases to SE to S at 8 - 14 mph during the evening.



Surface wind light and variable and controlled by local terrain.  Surface wind increases to SE to S at 4 - 8 mph during the evening.



OUTLOOK:



THURSDAY

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.



FRIDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SATURDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable during the morning becoming SSE to SSW at 6 - 10 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, October 20, 2010.

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



Zone 630 and 632:

Delay ignitions until 10:00am.  Avoid ignitions within 15 miles in all directions of SSRAs.  Watch for shifting transport winds.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions or in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30pm.



Zone 633 - 638:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the SE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the SE through SW in or near drainages leading to SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30pm.



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

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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