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

Fri Jun 10 08:29:06 PDT 2011

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

-UPDATED FORECAST AND INSTRUCTIONS-

ISSUED: Friday, June 10, 2011       8:20 AM      Pete Parsons

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

A significant marine push overnight has deepened the marine layer, over western Oregon, more than was indicated in the previous forecast.  Some break-up of the marine clouds is expected later this afternoon, mainly south, but mixing heights will be slow to rise today.  Afternoon smoke dispersal conditions will be only marginal over the coast range and fair in the Cascades.

Note that total tonnages allowed have been decreased for many zones, especially in the coast range, and burning has been disallowed in some zones.  Please call the forecaster for clearance on previously planned burns that now fall out of prescription.

2.  DISPERSION

Zone 601-612 (North Coast Range and Cascades):

MORNING

Mixing height 1000 - 2000 ft.

Transport wind W to NW at 4 - 8 mph.

Surface wind W to NW at 4 - 8 mph.

AFTERNOON

Mixing height rising to 2200 - 3200 ft.

Transport wind W to NW at 8 - 12 mph.

Surface wind WSW to NW at 6 - 10 mph.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 1000 - 2000 ft.

Transport wind NW to NNE at 4 - 8 mph.

Surface wind NW to NNE at 4 - 8 mph.

AFTERNOON

Mixing height rising to 2300 - 3300 ft.

Transport wind NW to N at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind NNW to NNE at 6 - 10 mph.

Surface wind NNW to NNE at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height 1700 - 2700 ft.

Transport wind NW to N at 4 - 8 mph.

Surface wind NW to N at 4 - 8 mph.

AFTERNOON

Mixing height rising to 3000 - 4000 ft.

Transport wind NW to N at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind WNW to NNW at 6 - 10 mph.

Surface wind WNW to NNW at 5 - 9 mph.

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

These instructions are valid for burning conducted on Friday, June 10, 2011.

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Coast Range

Zone 601, 612, and 616 east of R9W

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 602, 603, and 620

No burning allowed.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.  Some burning allowed south of the Rogue River in Zone 620.  Call the forecaster.

Zone 615

Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 616 west of R8W

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

Zone 618 and 619

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

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 750 tons or less, spaced 10 miles apart.  South of T30S in Zone 616 units should be 500 tons or less, spaced 10 miles apart.  South of T30S in Zone 617 units should be 500 tons or less, spaced 10 miles apart.

Zone 610 and 611

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

Zone 620 and 622

No burning allowed.

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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