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, November 6, 2009       2:40 PM      Nick Yonker

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

Cold front quickly passed to the east this morning leaving the region under a cool trough pattern with the jet stream overhead.  This will lead to continued unsettled conditions with scattered showers through tomorrow.  Air mass will remain unstable and smoke dispersion excellent.

    OUTLOOK (SUNDAY - TUESDAY):

Upper level trough weakens on Sunday with a minor ridge building in, shutting off any remaining shower activity.  Ridge will pass to the east on Monday with another front approaching for later in the day.  Moisture from the front should move in Monday night and continue into Tuesday.  Other than Sunday night and early Monday, air mass will be mostly unstable and smoke dispersion good.

2.  DISPERSION

SATURDAY
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 3000 - 4000 ft during the evening.

Transport wind SW to W at 10 - 20 mph.

Surface wind SW to W at 8 - 12 mph during the morning and afternoon.  Surface wind decreases to SW to W at 6 - 12 mph during the evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early, rising above 5000 ft by late morning and through the afternoon.  Transport wind SSW to WSW at 4 - 8 mph during the morning becoming SSE to SSW at 6 - 12 mph during the afternoon.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early, rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SE to SSW at 9 - 15 mph during the morning becoming SSE to SSW at 15 - 25 mph during the afternoon.  Surface wind SE to S at 6 - 10 mph.

TUESDAY
Mixing height 2500 - 3500 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind WSW to WNW at 9 - 15 mph.  Surface wind WSW to WNW at 6 - 10 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, November 7, 2009.
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Avoid ignitions within 10 miles to the SW through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SW through W in or near drainages leading to 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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