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

Mon Oct 5 14:13:39 PDT 2009

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

ISSUED: Monday, October 5, 2009       2:30 PM      Jim Little

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

Weather this week will be dominated by high pressure aloft, with the axis of the high pressure remaining offshore.  Temperatures aloft should remain cool enough for good mixing heights, however.  Transport winds will be generally light and have a northerly component.

    OUTLOOK (WEDNESDAY - FRIDAY)

The upper ridge will remain more-or-less stationary with a generally northerly or north-northwesterly flow aloft over the region for continued fair weather.  Temperatures aloft should stay cool enough to allow mixing heights to be high enough to provide fair to good smoke dispersal conditions throughout the outlook period.

2.  DISPERSION

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

MORNING
Mixing height 1000 - 2000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 3700 - 4700 ft.
Transport wind increases to NNW to NNE at 6 - 10 mph.
Surface wind increases to NW to NNE at 5 - 9 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind NW to N at 8 - 14 mph.
Surface wind shifts to W to NNW at 4 - 8 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height 1600 - 2600 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind increases to NNW to NNE at 5 - 9 mph.
Surface wind increases to NNW to NNE at 6 - 10 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind shifts to NE to E at 4 - 8 mph.
Surface wind becomes light and variable and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 1800 - 2800 ft.
Transport wind NE to E at 6 - 10 mph.
Surface wind NE to E at 6 - 10 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind increases to NNW to NNE at 8 - 14 mph.
Surface wind shifts to NNW to NNE at 8 - 14 mph.

EVENING
Mixing height 1300 - 2300 ft.
Transport wind NNW to NNE at 5 - 9 mph.
Surface wind becomes light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING
Mixing height 2600 - 3600 ft.
Transport wind E to SE at 6 - 12 mph.
Surface wind E to SE at 6 - 10 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind becomes light and variable.
Surface wind shifts to N to ENE at 4 - 8 mph.

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

OUTLOOK:

WEDNESDAY
In the north mixing height below 1000 ft early rising to 1100 to 2100 ft by late morning rising to 3200 to 4200 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable during the morning becoming N to NE at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming N to NE at 8 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind light and variable.  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, October 6, 2009.
=================================================================

Coast Range

Zone 601 and 612
Units should be 1500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.

Zone 602 and 603
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Avoid ignitions north of Forest Grove/Hillsboro or Sheridan/Willamina in Zone 602.  Higher tonnage is possible south of T17S in Zone 603.  Call the forecaster.

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.  Higher tonnage is possible south of the Rogue River in Zone 620.  Call the forecaster.

Cascades

Zone 605, 606, 616, 617, and 623
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  Higher tonnage is possible south of T20S in Zone 606.  Call the forecaster.

Zone 607 and 608
Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 609, 610, and 611
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 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

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

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