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: Friday, May 15, 2009       2:40 PM      Nick Yonker

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

Upper level ridge continues to build over the state today and will remain strong over the region tomorrow as well.  Air mass will remain stable except for a brief period of good mixing during maximum afternoon heating.  Expect sunny skies and high temperatures in the upper 70s to low 80s.  Wind flow will be light, favoring an easterly direction.  Smoke dispersion will be mostly poor to fair.

    OUTLOOK (SUNDAY - TUESDAY):

Upper ridge remains strong over the region Sunday and Monday.  A frontal system that was supposed to arrive overnight Monday/Tuesday appears much weaker.  The only effects appear to be some increased onshore wind flow. Expect continued sunny skies and warm temperatures.  Air mass will remain mostly stable and smoke dispersion poor to fair.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning.  Afternoon mixing height rises to 4400 - 5000 ft then lowers below 1000 ft during the evening.

Transport wind E to SE at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to NNE to ENE at 4 - 8 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 4 - 8 mph during the afternoon and evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 2700 - 3700 ft by late morning rising above 5000 ft during the afternoon.  Transport wind E to SSE at 6 - 10 mph during the morning becoming SW to W at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to WNW at 6 - 10 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph.  Surface wind SSW to WSW at 4 - 8 mph.

TUESDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SW to W at 6 - 12 mph during the morning becoming W to NW at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 8 - 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 Saturday, May 16, 2009.
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Avoid ignitions within 15 miles to the NNE through SE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the NNE through SE in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.

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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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