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

Fri Sep 17 14:56:47 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, September 17, 2010       2:30 PM      Pete Parsons

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

    SATURDAY

An autumn-like weather pattern has set up across the Pacific Northwest.  A strong upper-level trough is centered about 700 miles off the Oregon and northern California coast and will circulate another surges of rain northward across western Oregon during the afternoon and evening.  Rain should spread from the southwest to northeast and dampen all districts by evening.  Rainfall totals could be impressive, for mid-September, over the coastal range.

     OUTLOOK (SUNDAY-TUESDAY)

The upper-level trough is forecast to finally move onshore late Sunday with steady rain turning to showers.  Some of the higher peaks may get a dusting of snow early Monday, with the passage of the upper-level trough.  The snow level could drop as low as 7000 feet north and 8000 feet south.  Colder air aloft will keep a few showers going into Monday afternoon with the flow aloft turning more westerly. Tuesday looks mostly dry with a continued westerly flow aloft.

2.  DISPERSION

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

MORNING

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.

Transport wind light and variable but favors SE to S and controlled by local terrain.

Surface wind light and variable but favors NE to SE and controlled by local terrain.

AFTERNOON

Mixing height 2500 - 3500 ft.

Transport wind increases to ESE to SSE at 6 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind SE to SSW at 4 - 8 mph.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.

Transport wind light and variable but favors SE and controlled by local terrain.

Surface wind light and variable but favors SE and controlled by local terrain.

AFTERNOON

Mixing height 3000 - 4000 ft.

Transport wind increases to SSE to SSW at 4 - 8 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind becomes light and variable but favors SE and controlled by local terrain.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.

Transport wind light and variable but favors SE to S and controlled by local terrain.

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

AFTERNOON

Mixing height 2300 - 3300 ft.

Transport wind increases to SSE to SSW at 6 - 10 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1700 ft.

Transport wind similar to afternoon.

Surface wind increases to SE to S at 4 - 8 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.

Transport wind SE to SSW at 8 - 12 mph.

Surface wind SSE to SSW at 6 - 10 mph.

AFTERNOON

Mixing height 3000 - 4000 ft.

Transport wind SSE to SW at 4 - 8 mph.

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

EVENING

Mixing height 1000 - 1700 ft.

Transport wind becomes light and variable but favors SE and controlled by local terrain.

Surface wind similar to afternoon.

OUTLOOK:

SUNDAY

Mixing height 1800 to 2800 ft during the morning rising to 3600 to 4600 ft during the afternoon.  Transport wind S to SSW at 8 - 12 mph during the morning becoming SSW to WSW at 10 - 18 mph during the afternoon.  Surface wind SSE to SSW at 4 - 8 mph during the morning becoming SSW to WSW at 6 - 12 mph during the afternoon.

MONDAY

Mixing height 1800 to 2800 ft during the morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SW to W at 8 - 12 mph.  Surface wind S to SW at 4 - 8 mph during the morning becoming WSW to NW at 4 - 8 mph during the afternoon.

TUESDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

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

These instructions are valid for burning conducted on Saturday and Sunday, September 18 and 19, 2010.

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For Saturday:

Coast Range

Zone 601, 602, 603, 612, 618, 619, and 620

Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of coastal SSRAs.

Zone 615 and 616 west of R8W

Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

Zone 616 east of R9W

Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Cascades

Zone 605, 606, 611, and 616

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  In zone 616 avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.

Zone 607, 608, 609, 610, 617, 620, 622, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Siskiyous

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

For Sunday:

Coast Range

Zone 601 and 612

Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603

No burning allowed.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 15 miles apart, south of the Siuslaw River in Zone 603.

Zone 615 and 616 west of R8W

Units should be 1500 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.

Zone 616 east of R9W

Units should be 750 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, 619, and 620

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Cascades

All zones except zone 611

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Avoid ignitions north of T24S in Zone 616.

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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