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, November 3, 2010       2:40 PM      Jim Little



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


    THURSDAY
*** Marginal Smoke Dispersal Conditions Continue ***
Thursday's upper air pattern will be very similar to Wednesday's - just shifted slightly eastward.  Upper flow over the region will be from the southwest.  Low level flow will be generally south to southeasterly with suppressed mixing heights for unfavorable ventilation conditions.  Transport winds will be generally south or southeasterly.
    EXTENDED OUTLOOK (FRIDAY - SUNDAY)
On Friday an upper level trough approaches from the west.  Associated cooler air aloft should allow for higher maximum mixing heights for improved ventilation conditions.  Transport winds will be generally southerly.  The upper trough moves through early Saturday and there will be some stabilization during the afternoon.  However another relatively weak front will brings more rain during the evening.  Expect a few left-over showers Sunday, good smoke dispersal conditions and transport winds mostly from the southwest.

2.  DISPERSION



THURSDAY

Mixing height below 1000 ft during the morning.  Afternoon mixing height rising to 1000 - 1700 ft then rising to 1600 - 2600 ft during the evening.



Transport wind S to SSW at 8 - 10 mph.



Surface wind SSE to SW at 4 - 8 mph.



OUTLOOK:



FRIDAY

Mixing height 3700 - 4700 ft during the morning and through the afternoon.  Transport wind SSW to SW at 19 - 33 mph.  Surface wind S to SW at 10 - 16 mph.



SATURDAY

Mixing height below 1000 ft early rising to 1600 - 2600 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning rising to 4500 - 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, November 4, 2010.

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Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 15 miles to the SSE through SW of SSRAs.



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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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