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 1, 2009       2:40 PM      Nick Yonker

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

Upper level ridge is passing by to the east this afternoon as increasing clouds from a frontal system and trough moving up from the southwest pushes in this evening.  Increasing rain arrives tonight and early Saturday morning.  Air mass will be somewhat stable during the night and early morning but cooler air moving in aloft, plus increasing southerly flow, will make for good mixing and dispersion on Saturday.

    OUTLOOK (SUNDAY - TUESDAY):

Upper trough continues to move in Sunday with more moisture increasing during the morning hours on Sunday.  Rain will continue on and off Sunday before drying out later in the day.  Another front will move in Monday bringing more rain and wind.  Expect continued cool, breezy, and showery conditions into Tuesday.  Air mass will be mostly unstable through the period, and with brisk SW'erly flow, smoke dispersion will remain mostly excellent.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 3000 - 4000 ft during the evening.

Transport wind SW to WSW at 13 - 25 mph.

Surface wind SSE to SSW at 10 - 16 mph.

OUTLOOK:

SUNDAY
Mixing height 3200 - 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 18 - 30 mph during the morning becoming WSW to W at 18 - 32 mph during the afternoon.  Surface wind SSE to SSW at 10 - 16 mph during the morning becoming SW to W at 12 - 24 mph during the afternoon.

MONDAY
Mixing height 3200 - 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 12 - 22 mph during the morning becoming S to SSW at 15 - 30 mph during the afternoon.  Surface wind SSE to SSW at 9 - 15 mph.

TUESDAY
Mixing height 3500 - 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 22 - 38 mph.  Surface wind SW to W at 15 - 25 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, May 2, 2009.
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Avoid ignitions within 10 miles to the SSW through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the S through WSW 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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