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

Fri Dec 3 14:19:00 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, December 3, 2010       2:30 PM      Nick Yonker

***Smoke management has ended weekend forecasting for the fall burning season.  Today's forecast will include instructions for both Saturday and Sunday.  Please call this afternoon if you want to seek waivers from today's instruction for the weekend.***

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

Upper level ridge will continue to build over the state tomorrow as an upper level low digs to the south several hundred miles to the west and southwest of the state.  Southerly flow aloft will stream some mid and high clouds into the region bringing a risk of a few sprinkles.  Otherwise, expect mostly dry and fair conditions with some patchy fog in the valleys during the morning hours.  Air mass will be stable but decent offshore flow will provide burning opportunities in the Coast Range.

    OUTLOOK (SUNDAY - TUESDAY)

Upper level low drops southward to just off the southern California coast and will continue to stream clouds over the state with a continued chance of light showers.  Upper ridge gradually moves to the east.  Air mass will remain stable with continued offshore flow.  This low gradually dissipates Sunday and Monday but another low moves in to the west of the state by Monday.  Air mass will remain stable and will also dry out some.  Low will move closer by Tuesday to bring a front just offshore and increase the chance of moisture during the afternoon and evening.  Wind flow will increase from the SE to S and improve mixing and smoke dispersion.

2.  DISPERSION

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

MORNING

Mixing height 1000 - 2000 ft.

Transport wind NE to E at 10 - 16 mph.

Surface wind NE to E at 6 - 10 mph.

AFTERNOON

Mixing height 1300 - 2300 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind NE to E at 8 - 12 mph.

Surface wind NNE to ENE at 5 - 9 mph.

Zone 605-611 (North Cascades):

MORNING

Mixing height 1000 - 2000 ft.

Transport wind NE to E at 8 - 12 mph.

Surface wind N to NE at 5 - 9 mph.

AFTERNOON

Mixing height 1300 - 2300 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind becomes light and variable but favors NNE to ENE and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1000 ft.

Transport wind ESE to SSE at 4 - 8 mph.

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

AFTERNOON

Mixing height 1000 - 2000 ft.

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

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind increases to E to SE at 5 - 9 mph.

Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 1000 ft.

Transport wind E to SE at 8 - 12 mph.

Surface wind E to SE at 5 - 9 mph.

AFTERNOON

Mixing height 1000 - 2000 ft.

Transport wind similar to morning.

Surface wind E to SE at 5 - 9 mph.

EVENING

Mixing height lowers below 1000 ft.

Transport wind ESE to SE at 10 - 16 mph.

Surface wind similar to afternoon.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning and through the afternoon.  Transport wind ENE to ESE at 6 - 12 mph.  Surface wind ENE to ESE at 5 - 9 mph.

MONDAY

Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning rising to 1500 to 2500 ft during the afternoon.  Transport wind ESE to SSE at 8 - 12 mph.  Surface wind ESE to SSE at 4 - 8 mph.

TUESDAY

Mixing height below 1000 ft early rising to 1000 to 1800 ft by late morning rising to 1700 to 2700 ft during the afternoon.  Transport wind SE to S at 10 - 18 mph during the morning becoming SSE to S at 15 - 25 mph during the afternoon.  Surface wind SE to S at 8 - 12 mph during the morning becoming SE to S at 10 - 20 mph during the afternoon.

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

These instructions are valid for burning conducted on Saturday and Sunday, December 4 and 5, 2010.

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

For Saturday:

Coast Range

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

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 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 616 east of R9W

Units should be 750 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 toward the west edge of the zone.  Call the forecaster.

Cascades

Zone 605 and 606

No burning allowed.  Some burning is possible south of T20S in Zone 606.  Call the forecaster.

Zone 607, 608, 616, 617, and 623

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 609, 610, and 611

Units should be 1200 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 620 and 622

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 15 miles apart, and 15 miles from downwind SSRAs.

For Sunday:

Coast Range

All Zones

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

Cascades

Zone 605 and 606

No burning allowed.

Zone 607, 608, 616, 617, and 623

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 609, 610, and 611

Units should be 1200 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 620 and 622

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

Siskiyous

Units should be 1000 tons or less, spaced 15 miles apart, and 15 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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