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

Thu Oct 8 14:25:58 PDT 2009

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

ISSUED: Thursday, October 8, 2009       2:30 PM      Nick Yonker

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

Upper level ridge remains in the eastern Pacific bringing dry N to NW'erly flow aloft over the region.  A dry cold front will drop southward tomorrow bringing some cooling aloft.  The front may produce a few clouds and a chance of a sprinkle but for the most part it will be a dry front.  Air mass may destabilize a little or stay about the same as today.  Expect mostly fair smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY)

Cooler northerly flow continues to drop southward into the region into early Sunday bringing some chilly mornings and cooler days.  Air mass stability will remain about the same.  Expect continued mostly clear skies under decent offshore flow.  Northerly flow slips to the east Sunday as a minor and transitory ridge builds in.  This ridge will move off to the east as a well organized trough and front move in beginning Monday.  Expect increasing southerly winds Monday and improving smoke dispersion.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft early rising to 1300 - 2300 ft by late morning.
Transport wind NNW to NE at 6 - 10 mph.
Surface wind light and variable but favors NNW to NE.

AFTERNOON
Mixing height rising to 2800 - 3800 ft.
Transport wind N to NE at 8 - 14 mph.
Surface wind increases to NNW to NE at 6 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind similar to afternoon.
Surface wind NNE to ENE at 6 - 10 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.
Transport wind NNW to NE at 4 - 8 mph.
Surface wind light and variable but favors NNW to NNE.

AFTERNOON
Mixing height 3200 - 4200 ft.
Transport wind N to NE at 8 - 12 mph.
Surface wind increases to NNW to NE at 6 - 10 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind similar to afternoon.
Surface wind N to NE at 6 - 10 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.
Transport wind N to NE at 8 - 12 mph.
Surface wind NNW to NE at 4 - 8 mph.

AFTERNOON
Mixing height rising to 3000 - 4000 ft.
Transport wind NNW to NNE at 9 - 15 mph.
Surface wind NNW to NNE at 6 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind N to NE at 8 - 12 mph.
Surface wind NNW to NE at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.
Transport wind NW to NNE at 5 - 9 mph.
Surface wind light and variable but favors NNW to NE and controlled by local terrain.

AFTERNOON
Mixing height rising to 4000 - 5000 ft.
Transport wind NNW to NNE at 8 - 14 mph.
Surface wind increases to NNW to N at 8 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind shifts to NE to E at 5 - 9 mph.
Surface wind becomes light and variable but favors NNW to NE and controlled by local terrain.

OUTLOOK:

SATURDAY
In the Coast Range mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 2800 to 3800 ft during the afternoon.  In the Cascades mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind NE to ENE at 8 - 12 mph.  Surface wind NNE to ENE at 4 - 8 mph.

SUNDAY
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 6 - 10 mph.  Surface wind light and variable during the morning becoming N to NE at 5 - 9 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 2500 to 3500 ft during the afternoon.  Transport wind SSE to S at 10 - 22 mph.  Surface wind ESE to SSE at 8 - 12 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Friday, October 9, 2009.
=================================================================

Coast Range

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

Zone 602 and 603
Units should be 1000 tons or less, spaced 10 miles apart, and 12 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 616 west of R8W
Units should be 1500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 620
Units should be 500 tons or less, spaced 10 miles apart, and 12 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.

Zone 616
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  South of T30S units should be 500 tons or less, spaced 8 miles apart.

Zone 620 and 622
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

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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