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

[ODF Smoke Management Instructions]

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

ISSUED: Friday, December 18, 2009       2:30 PM      Nick Yonker

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

Cold front pretty much fell apart as it came in last night.  Ridge has rebuilt and is keeping the air mass quite stable.  Next warm front arrives on Saturday increasing the rain during the morning.  Expect continued stable conditions with light to moderate SE to S winds.  Smoke dispersion will remain poor to fair.

    OUTLOOK (SUNDAY - TUESDAY)

Cold front moves in on Sunday bringing more rain and stronger wind.  Air mass destabilizes.  First upper trough will then follow through late Sunday.  Another cold front and stronger trough moves in Monday bringing more moisture and considerably cooler air aloft.  Snow level will drop to 1500 - 2500 ft Monday night.  Upper trough will move through late Monday and off to the east on Tuesday.  Air mass will destabilize further Monday and remain unstable Tuesday.  Expect good to excellent smoke dispersion through the period.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft.
Transport wind light and variable but favors E to S and controlled by local terrain.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 1300 - 2300 ft.
Transport wind increases to SE to S at 10 - 16 mph.
Surface wind increases to ESE to S at 4 - 8 mph.

EVENING
Mixing height 1800 - 2800 ft.
Transport wind SSE to SSW at 12 - 24 mph.
Surface wind increases to SSE to SSW at 10 - 16 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning.
Transport wind SSE to SW at 5 - 9 mph.
Surface wind light and variable but favors SE to SSW and controlled by local terrain.

AFTERNOON
Mixing height 1700 - 2700 ft.
Transport wind increases to SSE to SSW at 12 - 22 mph.
Surface wind increases to SSE to SSW at 8 - 12 mph.

EVENING
Mixing height 1200 - 2200 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft early rising to 1000 - 1800 ft by late morning.
Transport wind SSE to SSW at 6 - 10 mph.
Surface wind light and variable but favors SE to SSW and controlled by local terrain.

AFTERNOON
Mixing height 1800 - 2800 ft.
Transport wind similar to morning.
Surface wind similar to morning.

EVENING
Mixing height 1000 - 1800 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

OUTLOOK:

SUNDAY
Mixing height 2500 to 3500 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind S to SSW at 14 - 28 mph.  Surface wind SSE to SSW at 8 - 14 mph during the morning becoming S to SW at 10 - 18 mph during the afternoon.

MONDAY
Mixing height 4200 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 20 - 35 mph during the morning becoming WSW to W at 15 - 25 mph during the afternoon.  Surface wind SSE to SSW at 10 - 18 mph during the morning becoming SW to W at 10 - 16 mph during the afternoon.

TUESDAY
Mixing height above 5000 ft throughout the day.  Transport wind SW to W at 10 - 20 mph.  Surface wind SW to W at 6 - 12 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Saturday and Sunday, December 19 and 20, 2009.
=================================================================

For Saturday:

Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 602 and 603
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 15 miles apart, south of the Siuslaw River in Zone 603.

Zone 615 and 616 west of R8W
Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 618, 619 and 620
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.


Cascades

Zone 605 and 606
No burning allowed.  Some small units are possible at least 10 miles to the east of the SSRA.

Zone 607, 608, and 611
Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 609, 610, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 616
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.

Zone 620 and 622
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.


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

For Sunday:

Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 8 miles apart, south of the Siuslaw River in Zone 603.

Zone 615, 616, 618, 619, and 620
Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of the North Bend/Coos Bay SSRA.


Cascades

Zone 605, 606, 611, and 616
Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  In zone 616 avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.

Zone 607, 608, 609, 610, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 620 and 622
Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.


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

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