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

Thu Jun 24 14:30:12 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Thursday, June 24, 2010       2:30 PM      Pete Parsons

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

    FRIDAY

A weak upper level trough will shift east of the Cascades by midday and progress to near the Idaho border by the evening.  Strong low-level onshore flow will result in considerable morning low clouds west of the Cascade crest.  Areas of morning drizzle are possible with skies slowly clearing in the afternoon. Light morning transport winds will turn northwesterly and increase in the afternoon with improving smoke dispersal conditions. Temperatures will cool to slightly below normal.

     OUTLOOK (SATURDAY-MONDAY)

A flat upper-level ridge will move over Oregon Saturday with light morning transport winds.  Morning marine clouds will break up more quickly with a sea-breeze increasing the onshore flow in the afternoon.  Temperatures should warm to near or slightly above normal.  The weakening ridge is forecast to get forced east of the state Sunday by a strengthening southwesterly flow aloft.  That may trigger another inland surge of marine air late in the day.  The marine layer is forecast to deepen on Monday with more extensive morning clouds and temperatures cooling back below normal. No significant precipitation is expected during the outlook period. Smoke dispersion should be fair to good in the afternoons.

2.  DISPERSION

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

MORNING

Mixing height below 1200 ft early rising to 1700 - 2700 ft by late morning.

Transport wind WNW to NNW at 5 - 9 mph.

Surface wind WNW to NNW at 4 - 8 mph.

AFTERNOON

Mixing height rising to 3000 - 4000 ft.

Transport wind NW to NNW at 9 - 15 mph.

Surface wind NW to NNW at 8 - 12 mph.

EVENING

Mixing height 1200 - 2200 ft.

Transport wind WNW to NNW at 6 - 12 mph.

Surface wind WNW to NNW at 4 - 8 mph.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 1200 ft early rising to 2100 - 3100 ft by late morning.

Transport wind W to NW at 4 - 8 mph.

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

AFTERNOON

Mixing height rising to 3500 - 4500 ft.

Transport wind WNW to NNW at 6 - 12 mph.

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

EVENING

Mixing height 2000 - 3000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1200 ft early rising to 1700 - 2700 ft by late morning.

Transport wind NW to N at 5 - 9 mph.

Surface wind NW to N at 4 - 8 mph.

AFTERNOON

Mixing height rising to 3000 - 4000 ft.

Transport wind NW to N at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind NNW to NNE at 6 - 10 mph.

Surface wind NW to NNE at 4 - 8 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 1200 ft early rising to 2700 - 3700 ft by late morning.

Transport wind WNW to NNW at 4 - 8 mph.

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

AFTERNOON

Mixing height rising to 4000 - 5000 ft.

Transport wind NW to NNW at 8 - 12 mph.

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

EVENING

Mixing height 2000 - 3000 ft.

Transport wind NW to N at 8 - 12 mph.

Surface wind NW to N at 6 - 10 mph.

OUTLOOK:

SATURDAY

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 during the morning becoming NW to NNE at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.

SUNDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3800 to 4800 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

MONDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.

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

These instructions are valid for burning conducted on Friday, June 25, 2010.

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Coast Range

Zone 601, 612, and 616 east of R9W

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.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.  Restrict units to 500 tons or less south of T30S in Zone 616.

Zone 602 and 603

Units should be 300 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Avoid burning in or near corridors.  Higher tonnage is possible south of T17S in Zone 603.  Call the forecaster.

Zone 615

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

Zone 616 west of R8W

Units should be 1200 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 618 and 619

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

Zone 620

No burning allowed.  Some burning allowed south of the Rogue River.  Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 609, 611, 616, 617, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T12S through T17S in Zone 608 units should be 1000 tons or less, spaced 8 miles apart.  South of T30S in Zone 616 units should be 500 tons or less, spaced 8 miles apart.

Zone 610

Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 620 and 622

Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  East of R2W in Zone 622, use standard guidance matrix. (See section 5 below.)

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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