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

Mon Sep 27 07:49:47 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, September 27, 2010       7:30 AM      Jim Little

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

The Pacific Northwest remains under southwest flow aloft with an upper level ridge building over the intermountain region.  The basic pattern is fairly stable with not much change expected with a threat of some drizzle or sprinkles for northern coastal areas and a mixtures of clouds  and sun inland, especially north.  Onshore flow will increase tomorrow for more cloud cover.  Smoke dispersal conditions will be marginal for coastal zones and marginal to fair for the Cascades.

2.  DISPERSION

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

MORNING

Mixing height 1300 - 2300 ft.

Transport wind SSW to WSW at 6 - 12 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind becomes light and variable and controlled by local terrain.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height 1700 - 2700 ft.

Transport wind S to SW at 5 - 9 mph.

Surface wind S to SW at 5 - 9 mph.

AFTERNOON

Mixing height 2400 - 3400 ft.

Transport wind shifts to NNW to NNE at 4 - 8 mph.

Surface wind shifts to NNW to NNE at 4 - 8 mph.

EVENING

Mixing height lowers below 1000 ft.

Transport wind becomes light and variable and controlled by local terrain.

Surface wind becomes light and variable and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 1600 - 2600 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 2700 - 3700 ft.

Transport wind NW to NNE at 6 - 12 mph.

Surface wind increases to NW to NNE at 6 - 12 mph.

EVENING

Mixing height lowers below 1000 ft.

Transport wind NW to N at 4 - 8 mph.

Surface wind becomes light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING

Mixing height 2200 - 3200 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind increases to NW to N at 8 - 12 mph.

Surface wind increases to NW to N at 6 - 12 mph.

EVENING

Mixing height lowers below 1000 ft.

Transport wind NNW to NE at 5 - 9 mph.

Surface wind becomes light and variable and controlled by local terrain.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA

These instructions are valid for burning conducted on Monday, September 27, 2010.

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Coast Range

Zone 601 and 612

Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 602 and 603

No burning allowed.

Zone 615, 618, and 619

Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of the North Bend/Coos Bay SSRA.

Zone 616 west of R8W

Units should be 1500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 616 east of R9W

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 620

Units should be 500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of the Rogue River.  Call the forecaster.

Cascades

Zone 605 and 606

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA.  Higher tonnage is possible south of T20S in Zone 606.  Call the forecaster.

Zone 607 and 608

Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 609, 610, 611, 616, 617, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 620 and 622

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.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

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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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