SMI West (Smoke Management Instructions) Western Oregon Smoke Management Instructions

Fri Jun 12 14:28:52 PDT 2009

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, June 12, 2009       2:30 PM      Nick Yonker

1.  DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623

Upper level low will continue to spin moisture over the region mostly from the east to the west through Saturday.  Air mass will be generally unstable except for brief early morning stability.  Expect continued mostly cloudy skies and moderately cool temperatures.  Scattered showers and thundershowers are possible, especially over the mountains during the afternoon to early evening.  Wind flow will remain light, favoring onshore flow during the late morning to afternoon.  Smoke dispersion will remain fair to good.

    OUTLOOK (SUNDAY - TUESDAY)

Upper low over the state weakens and opens into a weak trough Sunday and Monday.  Scattered showers or thundershowers are likely to continue through the period, but may decrease by Tuesday.  Air mass will remain mostly unstable then stabilize some Tuesday as the trough weakens and gives way to a flat ridge.  Smoke dispersion will remain fair to good.

2.  DISPERSION

Zone 601, 602, 603 and 612 (North Coast Range):

MORNING
Mixing height below 3000 ft early rising to 3200 - 4200 ft by late morning.
Transport wind light and variable but favors NW to NE.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 3700 - 4700 ft.
Transport wind increases to WSW to NW at 6 - 12 mph.
Surface wind increases to W to NW at 6 - 10 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind similar to afternoon.
Surface wind WSW to NW at 4 - 8 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 3000 ft early rising above 5000 ft by late morning.
Transport wind light and variable but favors NW to NE.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to WSW to NW at 6 - 10 mph.
Surface wind increases to W to NNW at 4 - 8 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind similar to afternoon.
Surface wind WSW to NW at 5 - 9 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 3000 ft early rising to 3500 - 4500 ft by late morning.
Transport wind light and variable but favors NW to NE.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 3800 - 4800 ft.
Transport wind increases to W to NW at 6 - 12 mph.
Surface wind increases to WNW to NNW at 6 - 12 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind WNW to NNW at 5 - 9 mph.
Surface wind NW to N at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 3000 ft early rising above 5000 ft by late morning.
Transport wind light and variable but favors NW to Ne.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to W to NNW at 6 - 12 mph.
Surface wind increases to WNW to NNW at 5 - 9 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind similar to afternoon.
Surface wind WNW to NNW at 5 - 9 mph.

OUTLOOK:

SUNDAY
Mixing height 3500 to 4500 ft during the morning rising to 4200 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 5 - 9 mph during the afternoon.

MONDAY
Mixing height 2000 to 3000 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph during the morning becoming WNW to NNW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning and through the afternoon.  Transport wind SSW to WSW at 8 - 12 mph during the morning becoming W to NW at 6 - 12 mph during the afternoon.  Surface wind SSW to WSW at 5 - 9 mph during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Saturday, June 13, 2009.
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Coast Range

Zone 601 and 612
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Restrict units in or near corridors to 500 tons or less.

Zone 602 and 603
Units should be 300 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Avoid burning in or near corridors.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.

Zone 615
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 east of R9W and 620
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T35S in Zone 620.  Call the forecaster.

Zone 618
Units should be 2000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 619
Units should be 1500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Cascades

Zone 605, 606, 607, 608, 609, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T15S through T20S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.

Zone 610, 611, and 622
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  East of R2W in Zone 622, use standard guidance matrix. (See section 5 below.)

Zone 620
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Use standard guidance matrix. (See section 5 below.)

==============================================================
4.  SPECIAL NOTE:

    Call the smoke management duty forecaster at (503) 945-7401 to
    discuss burning.  Please do not call individual's numbers to
    discuss daily burning.  If the forecaster is not available,
    leave a message and he will return your call as soon as possible.
    Avoid calling between 2 to 2:30 p.m.

    The 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

5.  STANDARD GUIDANCE MATRIX:

  * Greater than 5000 ft mixing height:  No burning within 5 miles of
    downwind SSRA.  Maximum 100 tons per mile from downwind SSRA.
    Example:  500 ton maximum allowed if burned 5 miles from downwind SSRA.

  * 3000 - 5000 ft mixing height:  No burning within 10 miles of
    downwind SSRA.  Maximum 75 tons per mile from downwind SSRA.
    Example:  750 ton maximum allowed if burned 10 miles from downwind SSRA.

  * Less than 3000 ft mixing height:  No burning within 15 miles of
    downwind SSRA.  Maximum 50 tons per mile from downwind SSRA.
    Example:  750 ton maximum allowed if burned 15 miles from downwind SSRA.

  * All exceptions must be coordinated with the duty forecaster
    prior to ignition.

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