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, May 14, 2009       2:40 PM      Nick Yonker

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

Upper level ridge will build into the state tonight and Friday bringing sunshine and warmer temperatures.  Air mass will stabilize some during the night and morning hours but daytime heating should provide good mixing.  Wind flow will be light, favoring offshore to northerly flow as surface high pressure builds to the north.   Smoke dispersion will be mostly fair.

    OUTLOOK (SATURDAY - MONDAY):

Upper level ridge continues to build over the state on Saturday and Sunday, further stabilizing the air mass.  Ridge will then drift eastward later Sunday, opening the door for the next frontal system on Monday.  Expect mostly sunny skies and warm temperatures through Sunday.  The approaching trough will likely set off an evening marine push on Sunday.  Clouds increase Monday with moisture possibly moving in during the late afternoon to early evening.  Air mass destabilizes and smoke dispersion improves Monday as the front and trough move in.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind E to ESE at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to NNW to NNE 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:

SATURDAY
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning rising to 4300 - 5000 ft during the afternoon.  Transport wind ESE to SSE at 6 - 12 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind ESE to S at 5 - 9 mph during the morning becoming WSW to WNW at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W at 6 - 10 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind SW to WSW at 10 - 20 mph during the morning becoming WSW to W at 15 - 30 mph during the afternoon.  Surface wind SSW to WSW at 9 - 15 mph during the morning becoming WSW to W at 12 - 24 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 Friday, May 15, 2009.
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Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions 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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