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

Thu Jun 11 14:23:10 PDT 2009

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

ISSUED: Thursday, June 11, 2009       2:30 PM      Nick Yonker

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

A weak upper level low will continue to circulate over the state through Friday bringing continued clouds and some light showers or thundershowers.  Air mass will be mostly unstable and wind flow light.  Expect fair to good smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY)

The upper level low weakens over the weekend, opening up into a minor trough.  This then eventually forms into a new upper low over the state on Monday.  Expect generally cool, cloudy, and unstable conditions with light NW to N wind flow.  Smoke dispersion will remain fair to good.

2.  DISPERSION

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

MORNING
Mixing height 3500 - 4500 ft.
Transport wind light and variable but favors NNW to NNE.
Surface wind light and variable but favors NNW to NNE and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to NW to N at 6 - 12 mph.
Surface wind increases to NW to N at 6 - 12 mph.

EVENING
Mixing height lowers below 2000 ft after sunset.
Transport wind N to NE at 8 - 12 mph.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height 3700 - 4700 ft.
Transport wind light and variable but favors NNW to NNE.
Surface wind light and variable and controlled by local terrain.

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

EVENING
Mixing height lowers below 2000 ft after sunset.
Transport wind N to NE at 6 - 10 mph.
Surface wind similar to afternoon.

Zone 615-623 (South Coast Range and Cascades):

MORNING
Mixing height 3800 - 4800 ft.
Transport wind light and variable but favors NNW to NNE.
Surface wind NNW to NNE at 4 - 8 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to NW to N at 6 - 12 mph.
Surface wind NW to N at 6 - 12 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind NNW to NNE at 5 - 9 mph.
Surface wind similar to afternoon.

OUTLOOK:

SATURDAY
Mixing height 2200 to 3200 ft during the morning rising to 4200 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.

SUNDAY
Mixing height 2200 to 3200 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind WNW to NNW at 4 - 8 mph.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind NW to N at 4 - 8 mph.  Surface wind light and variable during the morning becoming NW to N 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 Friday, June 12, 2009.
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Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 5 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.

Zone 602, 603, and 620
Units should be 500 tons or less, spaced 5 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.  Higher tonnage is possible south of the Rogue River in Zone 620.  Call the forecaster.

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 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Restrict units to 500 tons or less south of T30S.

Cascades

Zone 605 and 606
Units should be 1200 tons or less, spaced 5 miles apart, and 10 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, 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.  South of T30S in Zone 616 units should be 500 tons or less, spaced 5 miles apart.  South of T30S in Zone 617 units should be 750 tons or less, spaced 5 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 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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