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: Saturday, November 7, 2009       2:40 PM      Nick Yonker

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

Strong WSW'erly jet stream will remain over the region through tomorrow with ridge not building in as much as earlier expected.  Expect partly to mostly cloudy skies.  Air mass will only stabilize some overnight then become unstable during the afternoon.  Wind flow will be light to moderate and lead to fair to good smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY):

Next cold front approaches the state Monday with clouds increasing through the afternoon and light moisture beginning during the evening.  Air mass will stabilize some ahead of the front but cooler air moving in with and behind the front will lift mixing levels by early Tuesday.  Showers diminish Tuesday.  Next front will move in on Wednesday.  Overall, expect mostly good to excellent mixing and smoke dispersion through the period.

2.  DISPERSION

SUNDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1700 - 2700 ft during the evening.

Transport wind SSW to SW at 9 - 15 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.

Surface wind S to SW at 6 - 10 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind S to SSW at 12 - 24 mph during the morning becoming SSW to SW at 22 - 38 mph during the afternoon.  Surface wind SSE to SW at 6 - 12 mph during the morning becoming SSW to SW at 13 - 25 mph during the afternoon.

TUESDAY
Mixing height 3200 - 4200 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind SSE to SSW at 8 - 12 mph.  Surface wind light and variable during the morning becoming SSE to SW at 6 - 10 mph during the afternoon.

WEDNESDAY
Mixing height 3200 - 4200 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind SW to WSW at 15 - 25 mph during the morning becoming SSW to SW at 18 - 32 mph during the afternoon.  Surface wind SW to W at 10 - 20 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 Sunday, November 8, 2009.
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Avoid ignitions within 10 miles to the SSE through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SSE 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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