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

Thu Sep 30 14:47:17 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Thursday, September 30, 2010       2:30 PM      Pete Parsons

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

    FRIDAY

A strong upper-level ridge will remain over the Pacific Northwest but shift slightly eastward.  The surface thermal trough is forecast to progress east of the Cascades with transport winds turning onshore in the afternoon.

      OUTLOOK (SATURDAY-MONDAY)

The upper-level ridge will weaken and continue to slowly shift eastward.  Transport winds are expected to turn more northerly Saturday, and then turn strongly onshore Sunday, as an upper-level trough, and corresponding cold front, approach the coastline. That will improve ventilation conditions.  Some rain is likely late Sunday with a few showers lasting into Monday.  The ridge is forecast to rebuild over the region late Monday and Tuesday.

2.  DISPERSION

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

MORNING

Mixing height below 500 ft early rising to 1300 - 2300 ft by late morning.

Transport wind SW to W at 6 - 10 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind becomes light and variable and controlled by local terrain.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 500 ft early rising to 1800 - 2800 ft by late morning.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2700 - 3700 ft.

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

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind becomes light and variable and controlled by local terrain.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 500 ft early rising to 1500 - 2500 ft by late morning.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind shifts to WSW to WNW at 4 - 8 mph.

Surface wind increases to W to NW at 4 - 8 mph.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind becomes light and variable and controlled by local terrain.

Surface wind becomes light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 500 ft early rising to 1700 - 2700 ft by late morning.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 3000 - 4000 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

SATURDAY

Mixing height below 1000 ft early rising to 1200 to 2200 ft by late morning rising to 2400 to 3400 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY

Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 3400 to 4400 ft during the afternoon.  Transport wind SW to WNW at 4 - 8 mph.  Surface wind light and variable during the morning becoming WSW to WNW at 4 - 8 mph during the afternoon.

MONDAY

Mixing height 1700 to 2700 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 8 - 12 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon.  Surface wind WSW to NW at 4 - 8 mph during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

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

These instructions are valid for burning conducted on Friday, October 1, 2010.

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

Coast Range

Zone 601, 612, and 616 east of R9W

Units should be 750 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.)  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

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 1000 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 618 and 619

Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 620

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T35S.  Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 609, 610, 617, and 623

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

Zone 611 and 616

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

Zone 620 and 622

No burning allowed.

Siskiyous

Units should be 750 tons or less, spaced 10 miles apart, and 12 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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