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

Sat Jun 12 14:22:12 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Saturday, June 12, 2010       2:30 PM      Pete Parsons

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

    SUNDAY

A mostly dry cold front is forecast move onshore in the morning with the weak upper-level ridge sliding east of the Cascades.  Patchy morning drizzle is possible along the western slopes of the northern coastal range with some marine clouds penetrating into the northwestern interior.  Skies should remain mostly clear across the southern zones and east of the Cascade crest.  As the weakening cold front sweeps across the region, increasing onshore flow will likely cool northern zone temperatures close to normal, with northerly transport winds holding southern zones temperatures close to Saturday's values. Daytime heating should yield moderately high afternoon mixing heights.

    OUTLOOK (MONDAY-WEDNESDAY)

Onshore flow is forecast to strengthen during the outlook period, especially across the northern zones, as an upper-level trough comes onshore and stalls over Washington and Oregon.  On Monday, temperatures will cool back below normal north and to near normal south.  Further cooling is likely, across all zones, Tuesday and Wednesday.  Considerable low clouds will push back across the northern and central zones, west of the Cascade crest, with a chance of drizzle or light showers at times.  Skies will become at least partly cloudy across the southern zones, where transport winds will remain more northerly.  The chance of light showers will extend southward, to the California border, by Wednesday.  Daytime heating should yield moderately high afternoon mixing heights with brisk transport winds.

2.  DISPERSION

Zone 601, 602, 603, 612 and 615-620 (North and South Coast Range):

MORNING

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning.

Transport wind NW to N at 10 - 16 mph.

Surface wind NW to N at 8 - 14 mph.

AFTERNOON

Mixing height rising to 3500 - 4500 ft.

Transport wind increases to NW to N at 15 - 25 mph.

Surface wind NW to NNW at 10 - 22 mph.

EVENING

Mixing height 2000 - 3000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 605-611 and 616-623 (North and South Cascades):

MORNING

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning.

Transport wind NW to NNE at 5 - 9 mph.

Surface wind NW to NNE at 4 - 8 mph.

AFTERNOON

Mixing height 4000 - 5000 ft.

Transport wind increases to NW to N at 10 - 18 mph.

Surface wind increases to NW to N at 10 - 18 mph.

EVENING

Mixing height 2000 - 3000 ft.

Transport wind NNW to NNE at 9 - 15 mph.

Surface wind similar to afternoon.

OUTLOOK:

MONDAY

Mixing height 1900 to 2900 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind NNW to NNE at 10 - 20 mph.  Surface wind NNW to NNE at 8 - 12 mph.

TUESDAY

Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 10 - 20 mph.  Surface wind NNW to NNE at 8 - 12 mph.

WEDNESDAY

Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 10 - 20 mph.  Surface wind NNW to NNE at 9 - 15 mph.

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

These instructions are valid for burning conducted on Sunday, June 13, 2010.

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

Coast Range

Zone 601, 612, and 616 east of R9W

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.  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 8 miles apart, and 10 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 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W

Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 618 and 619

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

Zone 620

Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible 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.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  South of T30S in Zone 616 units should be 500 tons or less, spaced 8 miles apart.  South of T30S in Zone 617 units should be 750 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.

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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