SMI West (Smoke Management Instructions) Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, September 27, 2010       2:30 PM      Jim Little



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


High pressure remains over the region for fair skies and warm temperatures and relatively light winds aloft.  The high is centered to the south of the Pacific Northwest and to the west, over the ocean, flow is southwesterly.  Warm air aloft will suppress mixing heights for marginal to fair smoke dispersal conditions.
    EXTENDED OUTLOOK (WEDNESDAY - THURSDAY)
The ridge aloft builds Wednesday and mixing heights continue to decrease.  Smoke dispersal conditions will only be marginal along the coast and in the north interior.  On Thursday a disturbance embedded in the southwesterly flow aloft offshore turns higher level winds more southwesterly but mixing heights continue to decrease with many areas seeing maximum mixing heights of only about 2000 feet above ground level.  By Friday the disturbance is in Canada, mixing heights remain low, and low level flow goes onshore.



2.  DISPERSION



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



MORNING

Mixing height 1200 - 2200 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height rising to 2500 - 3500 ft.

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

Surface wind increases to NW to N at 6 - 10 mph.



EVENING

Mixing height lowers below 1000 ft.

Transport wind N to NE at 8 - 14 mph.

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



Zone 605-611 (North Cascades):



MORNING

Mixing height 1400 - 2400 ft.

Transport wind light and variable.

Surface wind NW to NNE at 4 - 8 mph.



AFTERNOON

Mixing height rising to 2600 - 3600 ft.

Transport wind increases to NNW to NE at 6 - 10 mph.

Surface wind NNW to NE at 6 - 12 mph.



EVENING

Mixing height 1000 - 2000 ft.

Transport wind NNE to ENE at 6 - 12 mph.

Surface wind NNE to ENE at 5 - 9 mph.



Zone 615-620 (South Coast Range):



MORNING

Mixing height 1500 - 2500 ft.

Transport wind N to NE at 5 - 9 mph.

Surface wind N to NE at 5 - 9 mph.



AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind increases to NW to N at 8 - 14 mph.

Surface wind NNW to N at 8 - 12 mph.



EVENING

Mixing height lowers below 1000 ft.

Transport wind becomes light and variable.

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



Zone 616-623 (South Cascades):



MORNING

Mixing height 1400 - 2400 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height rising to 2800 - 3800 ft.

Transport wind increases to NNW to NNE at 8 - 12 mph.

Surface wind increases to NNW to N at 8 - 12 mph.



EVENING

Mixing height lowers below 1000 ft.

Transport wind N to NE at 6 - 10 mph.

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



OUTLOOK:



WEDNESDAY

In the Coast Range mixing height below 1000 ft early rising to 1100 to 2100 ft by late morning rising to 2000 to 3000 ft during the afternoon.  In the Cascades mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 2800 to 3800 ft during the afternoon.  In the Coast Range transport wind light and variable during the morning becoming N to NE at 8 - 12 mph during the afternoon.  In the Cascades transport wind light and variable during the morning becoming NNW to NNE at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NE at 6 - 10 mph during the afternoon.



THURSDAY

Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning rising to 2100 to 3100 ft during the afternoon.  Transport wind WNW to NNW at 4 - 8 mph.  Surface wind WNW to NNW at 4 - 8 mph.



FRIDAY

Mixing height below 1000 ft early rising to 1100 to 2100 ft by late morning rising to 2600 to 3600 ft during the afternoon.  Transport wind NW to N at 4 - 8 mph during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.  Surface wind light and variable.



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

These instructions are valid for burning conducted on Tuesday, September 28, 2010.

=================================================================



Coast Range



Zone 601 and 612

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.



Zone 602 and 603

Units should be 300 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of T17S in Zone 603.  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 15 miles apart, and 15 miles from downwind SSRAs.



Zone 616 east of R9W

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



Zone 620

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of the Rogue River.  Call the forecaster.





Cascades



Zone 605 and 606

Units should be 750 tons or less, spaced 10 miles apart, and 12 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 1500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 609, 610, 611, 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 617 units should be 500 tons or less, spaced 10 miles apart.



Zone 616

Units should be 1000 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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