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: Tuesday, March 31, 2009       2:40 PM      Jim Little



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



A Pacific weather system will move across the northern half of the state tomorrow with south-central Oregon only feeling the effects of the southern fringes of this system.  A few light sprinkles are possible.  Mixing heights should be fairly high for good smoke dispersal conditions.  Transport winds will be generally west-southwesterly.



    OUTLOOK (THURSDAY - SATURDAY):



As the cold front progresses east, a few post frontal showers are possible Thursday.  Transport winds will turn more northwesterly Friday, shifting back to southerly on Saturday.  Dry weather will prevail throughout the region on Saturday.  Mixing heights should remain favorable for good smoke dispersion







2.  DISPERSION



WEDNESDAY



Transport wind WNW to NW at 10 - 22 mph during the morning.  Transport wind increases to W to WNW at 18 - 30 mph during the afternoon and evening.



Surface wind SSE to SSW at 6 - 12 mph during the morning.  Surface wind shifts to WSW to WNW at 8 - 12 mph during the afternoon and evening.





OUTLOOK:



THURSDAY

Mixing height 3100 - 4100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to W at 20 - 34 mph.  Surface wind SSW to SW at 8 - 14 mph during the morning becoming WSW to W at 12 - 22 mph during the afternoon.



FRIDAY

Mixing height 3000 - 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 12 - 24 mph.  Surface wind W to NW at 12 - 22 mph.



SATURDAY

Mixing height 2000 - 3000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to SSW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming SE to SSW at 6 - 12 mph during the afternoon.



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

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Wednesday, April 1, 2009.

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Avoid ignitions within 12 miles to the W through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the SW through NW in or near drainages leading to SSRAs.  No additional restrictions necessary.



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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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