SMI South Central (Smoke Management Instructions) South Central Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Thursday, September 23, 2010       2:40 PM      Pete Parsons



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



    FRIDAY



A building ridge of high pressure will clear skies over south-central Oregon with temperatures warming to above normal.  However, light transport winds will make for only marginal ventilation conditions.


     OUTLOOK (SATURDAY-MONDAY)


A very weak weather system is forecast to ride over the top of the protective ridge of high pressure Sunday but will have little effect on the generally stagnant weather pattern.  The ridge is forecast to hold firm through at least Monday with continued light transport winds making for only marginal ventilation conditions.



2.  DISPERSION



FRIDAY

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers below 1000 ft during the evening.



Transport wind SSW to WSW at 4 - 8 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 6 - 10 mph during the morning becoming SSW to WSW at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 5 - 9 mph during the afternoon.



SUNDAY

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 4 - 8 mph.  Surface wind light and variable.



MONDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 4000 - 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 Friday, September 24, 2010.

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Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4 p.m.



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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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