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

ODF Smoke Management Instructions smi_south_central at listsmart.osl.state.or.us
Sun Nov 7 14:30:58 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Sunday, November 7, 2010       2:40 PM      Jim Little



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


    MONDAY
Upper troughiness over the Pacific Northwest will be moving east during the day and a broad, flat ridge will be approaching from the west.  This will slowly stabilize the atmosphere but scattered showers will likely persist into the afternoon.  Expect fair to good smoke dispersal conditions most areas.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
An upper low moves rapidly across the eastern Pacific during the day on Tuesday.  A surface cold front associated with this low will bring rain back to the region.  Rain will reach the region by evening but amounts will be light.  The front and upper low move rapidly through the region and by Wednesday a strong ridge pops up to the west.  Subsidence with this ridge will depress maximum mixing heights somewhat but smoke dispersal conditions should remain fair.  The upper ridge moves eastward across the region on Thursday further stabilizing the atmosphere.  Expect smoke dispersal conditions to be generally poor.

2.  DISPERSION



MONDAY

Mixing height 3000 - 4000 ft during the morning.  Afternoon mixing height rises to 4300 - 5000 ft then lowers to 1000 - 1700 ft during the evening.



Transport wind W to NW at 6 - 12 mph.



Surface wind W to NW at 6 - 10 mph.



OUTLOOK:



TUESDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 3500 - 4500 ft during the afternoon.  Transport wind SSW to SW at 16 - 26 mph during the morning becoming SSW to SW at 23 - 41 mph during the afternoon.  Surface wind SSW to SW at 8 - 14 mph during the morning becoming SSW to SW at 15 - 25 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 2700 - 3700 ft during the afternoon.  Transport wind light and variable during the morning becoming SSW to WSW at 6 - 10 mph during the afternoon.  Surface wind light and variable.



THURSDAY

Mixing height 2500 - 3500 ft during the morning lowering to 1000 - 2000 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to WSW at 18 - 32 mph during the afternoon.  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 Monday, November 8, 2010.

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



Avoid ignitions within 15 miles to the W through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSW through NW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2:30pm.



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

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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