SMI South Central (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Wednesday, October 13, 2010       2:40 PM      Jim Little



1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625


    THURSDAY
Upper level flow over the Pacific Northwest will be southwesterly ahead of an upper level disturbance moving towards British Columbia and northern Washington on Thursday.  A weak front reaches Oregon's north coast late in the afternoon. The effects of all this should stay well to the north and weather for south-central Oregon should remain sunny and dry with generally good smoke dispersal conditions.
    EXTENDED OUTLOOK (FRIDAY - SUNDAY)
On Friday upper flow will be west-southwesterly with a weak ridge aloft.  The remains of the front that pushes into northwest Oregon on Thursday will move through, but with limited the moisture likely all that will happen locally is some brief gusty winds.   Otherwise expect dry weather and fair to good ventilation.  Saturday will see southwesterly flow aloft with dry weather and mild temperatures.  Transport level winds be mostly light and variable.  Little change for Sunday with a weak upper disturbance moving through that could produce a few clouds, but expect dry weather, mostly northwesterly transport winds, and generally good ventilation.



2.  DISPERSION



THURSDAY

Mixing height 1800 - 2800 ft during the morning.  Mixing height rises above 5000 ft during the afternoon and evening.



Transport wind SSW to SW at 12 - 24 mph during the morning.  Transport wind increases to SW to WSW at 18 - 30 mph during the afternoon and evening.



Surface wind SSW to SW at 9 - 15 mph during the morning.  Surface wind increases to SW to WSW at 12 - 22 mph during the afternoon then decreases to SSW to WSW at 8 - 12 mph during the evening.



OUTLOOK:



FRIDAY

Mixing height 2300 - 3300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 5 - 9 mph during the morning becoming SW to W at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to WNW at 6 - 10 mph during the afternoon.



SATURDAY

Mixing height below 1000 ft early rising to 1400 - 2400 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Thursday, October 14, 2010.

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Avoid ignitions within 10 miles to the SSW through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SSW through W in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.



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4.  SPECIAL NOTE:



    The smoke management forecaster is available at (503)

    945-7401.  The smoke management forecaster is available

    to discuss specific burns.  The duty forecaster phone

    number is (503) 945-7401. Please call this number and

    not individual's numbers to discuss daily burning. Please

    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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