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

ODF Smoke Management Instructions smi_south_central at listsmart.osl.state.or.us
Mon Nov 29 08:50:17 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, November 29, 2010       7:50 AM      Jim Little





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



High pressure aloft will dominate weather today across the region.  Low level inversions in valley areas will promote dense fog in the colder air near the surface during the morning hours.  Otherwise expect dry weather and generally fair skies with increasing clouds from an approaching Pacific weather system late in the day.  The high pressure aloft means quite stable conditions and suppressed maximum mixing heights for poor smoke dispersion especially during the morning hours.



2.  DISPERSION



MONDAY

Mixing height below 1000 ft during the morning.  Afternoon mixing height rising to 2000 - 3000 ft then lowering to 1500 - 2500 ft during the evening.



Transport wind SSW to WSW at 6 - 10 mph during the morning.  Transport wind increases to SSW to SW at 12 - 22 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to S to SW at 6 - 10 mph during the afternoon and evening.



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 29, 2010.

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



Unfavorable burning situation this morning due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the S through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the S through WSW 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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