SMI West (Smoke Management Instructions) (no subject)

Tue Nov 30 14:51:34 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Tuesday, November 30, 2010       2:30 PM      Jim Little

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

    WEDNESDAY
The cold front that brought rain and snow to much of the region Tuesday and Tuesday night is south and east of the area for Wednesday.  What remains of the weakening system are now in Idaho, northern Nevada, and northern California.  Scattered showers remain, but the air mass will rapidly stabilize and smoke dispersal conditions will be in the fair range.  Transport winds will be light and generally southwesterly in the north with a slightly stronger southwesterly transport flow for southern zones.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
An upper short wave re-energizes the front to the south on Thursday pushing precipitation back into the region.  Southern sections will see greater amounts, but northern areas will see renewed precipitation as well.  A drier pattern sets up for the Friday and the weekend and maximum mixing heights will be held down for likely marginal to perhaps poor smoke dispersal conditions later in the extended period.

2.  DISPERSION

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

MORNING

Mixing height below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 3200 - 4200 ft.

Transport wind increases to WNW to NNW at 4 - 8 mph.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind WNW to NNW at 6 - 12 mph.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 500 ft early rising to 1000 - 1600 ft by late morning.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 2500 - 3500 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 similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 2000 - 3000 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 similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height 1000 - 1700 ft.

Transport wind SE to S at 6 - 12 mph.

Surface wind ESE to S at 4 - 8 mph.

AFTERNOON

Mixing height rising to 2000 - 3000 ft.

Transport wind similar to morning.

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

EVENING

Mixing height lowers below 1000 ft.

Transport wind becomes light and variable.

Surface wind similar to afternoon.

OUTLOOK:

THURSDAY

Mixing height below 1000 ft early rising to 1000 to 1700 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY

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

SATURDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2000 to 3000 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 Wednesday, December 1, 2010.

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

Coast Range

Zone 601 and 612

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

Zone 602 and 603

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

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 618 and 619

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

Zone 620

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

Cascades

Zone 605 and 606

Units should be 300 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 607, 608, 610, and 611

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 609 and 623

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

Zone 616

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.

Zone 617

Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 620 and 622

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

Siskiyous

Units should be 750 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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