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

Fri Apr 3 14:33:26 PDT 2009

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

ISSUED: Friday, April 3, 2009       2:30 PM      Nick Yonker

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

Upper level ridge will build into the region tonight and tomorrow bringing a mostly sunny day.  Temperatures will remain cool with morning frost in many locations.  Temperatures recover to the mid to upper 50s during the afternoon.  Air mass will stabilize and wind flow turns lightly offshore.  Expect poor to fair smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY)

Upper ridge drifts to the east Sunday and Monday with an upper low undercutting it as it moves into California.  Overall, expect a dry and warm period with mostly sunny skies.  Air mass will be stable during the night and morning hours with a brief period of instability during the afternoon over inland locations.  Offshore flow will continue through Monday before breaking down and turning onshore again Tuesday afternoon.  Smoke dispersion will remain mostly poor to fair.

2.  DISPERSION

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

MORNING
Mixing height below 2000 ft early rising to 2500 - 3500 ft by late morning.
Transport wind E to SE at 5 - 9 mph.
Surface wind light and variable but favors N to E and controlled by local terrain.

AFTERNOON
Mixing height 2500 - 3500 ft.
Transport wind E to SE at 5 - 9 mph.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft.
Transport wind SE to S at 8 - 12 mph.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 2000 ft early rising to 2700 - 3700 ft by late morning.
Transport wind ESE to SSE at 8 - 12 mph.
Surface wind light and variable but favors N to E and controlled by local terrain.

AFTERNOON
Mixing height 3000 - 4000 ft.
Transport wind similar to morning.
Surface wind increases to N to NE at 5 - 9 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind ESE to SSE at 9 - 15 mph.
Surface wind becomes light and variable but favors N to E and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 2000 ft early rising to 2000 - 3000 ft by late morning.
Transport wind E to SSE at 4 - 8 mph.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 3000 - 4000 ft.
Transport wind SE to S at 6 - 10 mph.
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 2000 ft early rising to 2300 - 3300 ft by late morning.
Transport wind ESE to SSE at 8 - 12 mph.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising above 5000 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.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind ESE to S at 6 - 12 mph.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3200 to 4200 ft during the afternoon.  Transport wind ENE to ESE at 6 - 10 mph.  Surface wind ENE to ESE at 4 - 8 mph during the morning becoming light and variable during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind NNE to ENE at 4 - 8 mph during the morning becoming WNW to NW at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to WNW 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 Saturday and Sunday, April 4 and 5, 2009.
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For Saturday:

Coast Range

All Zones
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Cascades

Zone 605 and 606
Units should be 300 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 607 and 608
Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 609, 610, and 611
Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 616 and 617
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 620 and 623
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 622
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

For Sunday:

Coast Range

Zone 601, 602, 603, 612, 615, 618, and 619
Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of coastal SSRAs.

Zone 616 west of R8W
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 616 east of R9W
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 620
Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Cascades

Zone 605 and 606
No burning allowed.

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

Zone 616 and 617
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 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.

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