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, October 16, 2009       2:40 PM      Nick Yonker

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

Upper level ridge will slowly slide to the east tonight and tomorrow giving way to a frontal system and upper level trough later Saturday.  Moisture will probably not reach the region until later afternoon to evening.  Air mass will destabilize during the day, and with breezy southerly winds, will make for good to excellent smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Minor upper level ridge will move in Sunday following the passage of the upper level trough early Sunday morning.  This ridge will not last very long and will give way to another front expected to move in early Monday morning.  Trough will follow Monday afternoon then be replaced by an upper ridge for Tuesday.  Air mass will remain fairly unstable through this progressive weather pattern.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 3200 - 4200 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 3200 - 4200 ft during the evening.

Transport wind SSW to SW at 16 - 30 mph during the morning.  Transport wind increases to SW to WSW at 20 - 35 mph during the afternoon then decreases to SW to WSW at 16 - 30 mph during the evening.

Surface wind SSW to SW at 10 - 18 mph during the morning and afternoon.  Surface wind decreases to SSW to WSW at 10 - 16 mph during the evening.

OUTLOOK:

SUNDAY
Mixing height 2000 - 3000 ft during the morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SSW to WSW at 6 - 10 mph.  Surface wind light and variable during the morning becoming SSW to WSW at 6 - 10 mph during the afternoon.

MONDAY
Mixing height 2800 - 3800 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind WSW to W at 12 - 24 mph during the morning becoming W to NW at 8 - 12 mph during the afternoon.  Surface wind SW to W at 8 - 12 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 SSE to SSW at 10 - 18 mph.  Surface wind SE to S at 6 - 12 mph.

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, October 17, 2009.
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Avoid ignitions within 12 miles to the SSW through WSW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  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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