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

Sat Jun 5 14:15:27 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Saturday, June 5, 2010       2:30 PM      Pete Parsons

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

    SUNDAY

The strong westerly jet stream that has already brought two soaking storms to the region will direct another wet weather system across Washington and Oregon.  Significant rainfall is possible again across the entire region, although rainfall totals will generally be less than from the previous two storms. Clouds and rain will cool surface temperatures back below normal.  Smoke dispersal conditions will be fair to good with moderately high mixing heights and onshore transport winds.

    OUTLOOK (MONDAY-WEDNESDAY)

No major change to the overall weather pattern is expected.  However, the region will get another brief break between storms on Monday, with skies becoming partly to mostly sunny in the afternoon.  Temperatures should return to near normal.  Yet another weather system is forecast to bring back a chance of rain by Tuesday afternoon with widespread light rain expected Tuesday night and Wednesday.  The cool and damp weather pattern is forecast to continue at least through Friday.  High afternoon mixing heights and strong onshore flow will provide fair to good daytime smoke dispersal conditions during the outlook period.

2.  DISPERSION

Zone 601-612 (North Coast Range and Cascades):

MORNING

Mixing height below 1500 ft early rising to 2000 - 3000 ft by late morning.

Transport wind SSW to WSW at 8 - 12 mph.

Surface wind light and variable but favors S to W and controlled by local terrain.

AFTERNOON

Mixing height 2500 - 3500 ft.

Transport wind SW to W at 9 - 15 mph.

Surface wind increases to SW to WNW at 6 - 10 mph.

EVENING

Mixing height 1500 - 2500 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 2000 ft early rising to 2000 - 3000 ft by late morning.

Transport wind SSW to WSW at 15 - 25 mph.

Surface wind SSW to WSW at 6 - 10 mph.

AFTERNOON

Mixing height 2500 - 3500 ft.

Transport wind SW to W at 10 - 20 mph.

Surface wind SW to W at 6 - 10 mph.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind decreases to WSW to NW at 5 - 9 mph.

Surface wind shifts to W to NW at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 2000 ft early rising to 2500 - 3500 ft by late morning.

Transport wind SSW to SW at 15 - 25 mph.

Surface wind SSW to WSW at 8 - 12 mph.

AFTERNOON

Mixing height 3000 - 4000 ft.

Transport wind SW to W at 15 - 25 mph.

Surface wind WSW to WNW at 9 - 15 mph.

EVENING

Mixing height 1900 - 2900 ft.

Transport wind decreases to W to NW at 5 - 9 mph.

Surface wind W to NW at 5 - 9 mph.

OUTLOOK:

MONDAY

Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising to 4100 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NNW to NNE at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 6 - 12 mph during the afternoon.

TUESDAY

Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising to 4200 to 5000 ft during the afternoon.  Transport wind SW to WNW at 4 - 8 mph during the morning becoming WSW to WNW at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 6 - 10 mph during the afternoon.

WEDNESDAY

Mixing height 2000 to 3000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to NW at 6 - 10 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon.  Surface wind W to NW at 5 - 9 mph during the morning becoming NW to NNW at 8 - 14 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA

These instructions are valid for burning conducted on Sunday, June 6, 2010.

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Coast Range

Zone 601 and 612

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Restrict units in or near corridors to 500 tons or less.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603

Units should be 300 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Avoid burning in or near corridors.  Units may be 500 tons or less, spaced 10 miles apart, south of the Siuslaw River in Zone 603.

Zone 615, 616 west of R8W, and 620

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.  No burning allowed south of T35S in Zone 620.

Zone 616 east of R9W

Units should be 500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 618

Units should be 2000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 619

Units should be 1500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Cascades

All zones except zone 611

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T18S through T22S in Zone 608 units should be 750 tons or less, spaced 10 miles apart.

Zone 611

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

Siskiyous

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

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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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