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

Sun Jun 14 14:41:46 PDT 2009

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

ISSUED: Sunday, June 14, 2009       2:30 PM      Jim Little

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

The Pacific Northwest seems to be stuck in a pattern of persistent troughiness.  The upper trough that was over the region Sunday will drift east and another weak upper trough will approach from the west.  This will keep the atmosphere unstable and keep the chance for a shower or two in the forecast.  The instability will provide for good mixing heights and smoke dispersal conditions should be generally good.  Low level flow will be onshore limiting burning opportunities near coast range corridors leading to the Willamette Valley.

    OUTLOOK (TUESDAY - THURSDAY)

Upper level flow finally consolidates during the day on Tuesday with a westerly flow aloft developing.  The atmosphere stabilizes somewhat although smoke dispersal conditions should still be in the fair to good category.  Low level flow will remain generally onshore (westerly or northwesterly) throughout the outlook period.

2.  DISPERSION

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

MORNING
Mixing height 4000 - 5000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height lowers to 3300 - 4300 ft.
Transport wind increases to WNW to NNW at 8 - 12 mph.
Surface wind increases to WNW to NNW at 5 - 9 mph.

EVENING
Mixing height 1700 - 2700 ft.
Transport wind WNW to NNW at 6 - 12 mph.
Surface wind WNW to NNW at 5 - 9 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

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

EVENING
Mixing height 3000 - 4000 ft.
Transport wind WNW to NNW at 8 - 12 mph.
Surface wind NW to NNE at 4 - 8 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height lowers to 3500 - 4500 ft.
Transport wind increases to WNW to NNW at 6 - 10 mph.
Surface wind increases to WNW to NNW at 6 - 10 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind NW to NNE at 4 - 8 mph.
Surface wind NW to N at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind light and variable.
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 - 10 mph.
Surface wind increases to WNW to NNW at 5 - 9 mph.

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

OUTLOOK:

TUESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 6 - 10 mph during the afternoon.

WEDNESDAY
Mixing height 2900 to 3900 ft during the morning rising to 4400 to 5000 ft during the afternoon.  Transport wind NW to N at 4 - 8 mph.  Surface wind NW to N at 5 - 9 mph.

THURSDAY
Mixing height 2100 to 3100 ft during the morning rising to 3900 to 4900 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 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 Monday, June 15, 2009.
=================================================================

Coast Range

Zone 601 and 612
Units should be 750 tons or less, spaced 10 miles apart, and 12 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 10 miles apart, and 12 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, 611, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T12S through T17S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.

Zone 610 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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