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

Sat Jun 13 14:29:58 PDT 2009

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

ISSUED: Saturday, June 13, 2009       2:30 PM      Nick Yonker

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

Pesky upper level low finally weakens and opens up into a minor trough for Sunday.  This will mean less shower and thundershower activity that has plagued the state the last several days.  Expect less cloud cover and slightly warmer temperatures.  Air mass will remain mostly unstable and wind flow light, thus leading to continued fair to good smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY)

Weak upper level trough remains off the coast Monday but drifts to the south, leaving the region under a split flow for Tuesday.  A minor trough will move through later Tuesday to Wednesday and bring a modest marine push to the region.  Expect mostly sunny skies and warm temperatures Monday and Tuesday.  Marine push will likely bring some cloud cover into the western interior on Wednesday.  Air mass will stabilize more during the night and morning hours but destabilize pretty well during the afternoon.  Smoke dispersion will remain mostly fair, and then improve Wednesday under the marine air.

2.  DISPERSION

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

MORNING
Mixing height below 3000 ft early rising to 3000 - 4000 ft by late morning.
Transport wind light and variable but favors SW to NW.
Surface wind light and variable but favors SW to NW and controlled by local terrain.

AFTERNOON
Mixing height 4000 - 5000 ft.
Transport wind increases to W to NW at 4 - 8 mph.
Surface wind increases to W to NW at 4 - 8 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind W to NNW at 4 - 8 mph.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 3000 ft early rising to 4000 - 5000 ft by late morning.
Transport wind light and variable but favors SW to NW.
Surface wind light and variable but favors SW to NW and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to W to NW at 4 - 8 mph.
Surface wind increases to WNW to NNW at 5 - 9 mph.

EVENING
Mixing height 3500 - 4500 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 615-623 (South Coast Range and Cascades):

MORNING
Mixing height below 3000 ft early rising above 5000 ft by late morning.
Transport wind light and variable but favors W to NW.
Surface wind light and variable but favors W to NW and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to W to NW at 5 - 9 mph.
Surface wind increases to W to NW at 5 - 9 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind W to NW at 5 - 9 mph.
Surface wind WNW to NNW at 4 - 8 mph.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 2700 to 3700 ft by late morning rising to 3700 to 4700 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 2700 to 3700 ft by late morning rising to 3800 to 4800 ft during the afternoon.  Transport wind light and variable during the morning becoming W to NW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.

WEDNESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind WSW to WNW at 6 - 10 mph.  Surface wind WSW to WNW at 4 - 8 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Sunday, June 14, 2009.
=================================================================

Coast Range

Zone 601 and 612
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Restrict units in or near corridors to 500 tons or less.

Zone 602 and 603
Units should be 300 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Avoid burning in or near corridors.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.

Zone 615
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1200 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Restrict units to 500 tons or less south of T30S.

Zone 618
Use standard guidance matrix. (See section 5 below.)

Zone 619
Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 620
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T35S.  Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 609, 616, 617, 622, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T15S through T20S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.

Zone 610, 611, and 620
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Units should be 1500 tons or less, spaced 5 miles apart, and 10 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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