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

Mon Nov 30 08:05:10 PST 2009

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

ISSUED: Monday, November 30, 2009       7:30 AM      Jim Little

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

Upper air charts show a weak upper disturbance moving through southern British Columbia and a strong upper ridge building in the Gulf of Alaska.  Strong inversions have developed in the interior valleys and the atmosphere remains stable above.  Moisture trapped under the inversion is causing some valley drizzle this morning, but otherwise expect dry weather.  Transport winds will remain light for generally poor smoke dispersal conditions.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 1300 - 2300 ft.
Transport wind increases to WNW to NNW at 6 - 12 mph.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft.
Transport wind W to NW at 8 - 14 mph.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 1000 - 1700 ft.
Transport wind similar to morning.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 1000 - 1500 ft.
Transport wind similar to morning.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 1000 - 2000 ft.
Transport wind increases to W to NNW at 4 - 8 mph.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft.
Transport wind becomes light and variable.
Surface wind similar to afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Monday, November 30, 2009.
=================================================================

Coast Range

***Avoid ignitions before 11:00am in all zones.  Complete ignitions by 3:00pm in all zones.***

Zone 601, 612, and 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 Waldport in Zone 612.  Call the forecaster.

Zone 602 and 603
No burning allowed.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.

Zone 615 and 616 west of R8W
Units should be 1000 tons or less, spaced 15 miles apart, and 15 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 15 miles apart, and 15 miles from downwind SSRAs.

Cascades

***Avoid ignitions before 11:00am in all zones.  Complete ignitions by 3:00pm in all zones.***

Zone 605, 606, and 620
No burning allowed.

Zone 607, 608, 609, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 610 and 611
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 622
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  East of R2W, use standard guidance matrix. (See section 5 below.)

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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