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

Mon Jun 14 08:36:23 PDT 2010

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

ISSUED: Sunday, June 13, 2010       2:30 PM      Jim Little

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

    MONDAY

The upper ridge that brought sunshine to much of Oregon over the weekend moves east on Monday.  The coastal low clouds of Sunday will penetrate interior valleys.  This will hole temperatures down a few degrees.  Except for some spotty drizzle along the coast and in the coast range conditions should remain dry.  Transport winds will be generally northwesterly. Smoke dispersal conditions should be fair to good.

    OUTLOOK (TUESDAY-THURSDAY)

An upper level low drops down the British Columbia coastline and across northwest Washington during the day Tuesday.  This will increase the southwesterly flow aloft.  Some light rain is likely in the extreme northern zones otherwise conditions will remain dry.  Transport winds will be generally northwesterly.  By Wednesday the upper low covers the Pacific Northwest, centered over the southern Washington Cascades.  Moisture will be limited, but light rain is likely in the northern zones, southern zones will remain dry.  Subsidence aloft will suppress mixing heights for just fair smoke dispersal conditions most areas.  There will still be an upper trough over the region on Thursday but very limited moisture.  Some afternoon sun should drive mixing heights higher for good smoke dispersal conditions.  Wednesday and Thursday will see a continuation of a generally north or northwesterly transport wind.

2.  DISPERSION

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

MORNING
Mixing height 4000 - 5000 ft.
Transport wind NNW to N at 10 - 16 mph.
Surface wind NNW to N at 8 - 14 mph.

AFTERNOON
Mixing height 4300 - 5000 ft.
Transport wind increases to NW to N at 14 - 28 mph.
Surface wind increases to NW to NNW at 12 - 22 mph.

EVENING
Mixing height 3800 - 4800 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height 1600 - 2600 ft.
Transport wind NW to N at 6 - 12 mph.
Surface wind NW to N at 6 - 12 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind similar to morning.
Surface wind NW to NNW at 9 - 15 mph.

EVENING
Mixing height 4300 - 5000 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 3700 - 4700 ft.
Transport wind NNW to NNE at 9 - 15 mph.
Surface wind NNW to NNE at 9 - 15 mph.

AFTERNOON
Mixing height 3600 - 5000 ft.
Transport wind NNW to N at 10 - 20 mph.
Surface wind NNW to N at 10 - 18 mph.

EVENING
Mixing height 3400 - 4400 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft.

AFTERNOON
Mixing height remains below 1000 ft.
Transport wind similar to morning.
Transport wind N at 0 - 0 mph.
Surface wind similar to morning.
Surface wind N at 0 - 0 mph.

EVENING
Mixing height remains below 1000 ft.
Transport wind similar to afternoon.
Transport wind N at 0 - 0 mph.
Surface wind similar to afternoon.
Surface wind N at 0 - 0 mph.

OUTLOOK:

TUESDAY
Mixing height 2300 to 3300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 6 - 12 mph during the morning becoming NW to NNW at 10 - 20 mph during the afternoon.  Surface wind NNW to NNE at 5 - 9 mph during the morning becoming NW to NNW at 10 - 18 mph during the afternoon.

WEDNESDAY
Mixing height 1500 to 2500 ft during the morning rising to 2800 to 3800 ft during the afternoon.  Transport wind WNW to NNW at 8 - 14 mph.  Surface wind W to NW at 5 - 9 mph during the morning becoming NW to N at 5 - 9 mph during the afternoon.

THURSDAY
Mixing height 2100 to 3100 ft during the morning rising to 4100 to 5000 ft during the afternoon.  Transport wind NNW to NE at 6 - 12 mph.  Surface wind NNW to NE at 4 - 8 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Monday, June 14, 2010.
=================================================================

Coast Range

Zone 601, 612, and 616 east of R9W
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.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.  Restrict units to 500 tons or less south of T30S in Zone 616.

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 T17S in Zone 603.  Call the forecaster.

Zone 615
Units should be 2000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 618 and 619
Use standard guidance matrix. (See section 5 below.)

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

Cascades

Zone 605, 606, 607, 608, 609, 611, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  South of T30S in Zone 616 units should be 500 tons or less, spaced 8 miles apart.  South of T30S in Zone 617 units should be 750 tons or less, spaced 8 miles apart.

Zone 610
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 620 and 622
Units should be 500 tons or less, spaced 8 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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