SMI West (Smoke Management Instructions) (no subject)

Tue Nov 9 14:56:02 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Tuesday, November 9, 2010       2:30 PM      Jim Little

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

    WEDNESDAY
The weather system that brought rain or snow to much of the region on Tuesday moves south and east on Wednesday while an upper level ridge builds to the west and slowly drifts over the Pacific Northwest.  The ridge should help stabilize the atmosphere and suppress maximum mixing heights.  There is a chance of a lingering shower, especially in southern zones and especially during the morning hours.  Otherwise expect partly sunny skies and low maximum mixing heights for poor to marginal smoke dispersal conditions.  Winds will be mostly light and variable throughout the day.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper ridge moves through during the day on Thursday.  By late in the day a Pacific front moves into Oregon and Washington with rain reaching the north coast by late afternoon.  By evening much of the region will be experiencing light rain.  Maximum mixing heights will improve except in the southern Cascades where ventilation conditions will remain poor.
On Friday a broad ridge again builds over the eastern Pacific and noses in over the Pacific Northwest.  Ventilation conditions well remain generally fair except in the southern Cascades.  Winds will be light and variable in the north but generally northerly for southern zones.  This will likely be an opportunity to take care of units requiring northerly flow in that area.  Expect little change for Saturday except the northerly transport winds will cover the entire region.

2.  DISPERSION

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

MORNING

Mixing height below 500 ft early rising to 1200 - 2200 ft by late morning.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1700 - 2700 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 605-611 (North Cascades):

MORNING

Mixing height 1000 - 1700 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1200 - 2200 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind increases to N to S at 5 - 9 mph.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 1700 - 2700 ft.

Transport wind WSW to WNW at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2100 - 3100 ft.

Transport wind W to NW at 4 - 8 mph.

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

EVENING

Mixing height lowers below 1000 ft.

Transport wind becomes light and variable.

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

Zone 616-623 (South Cascades):

MORNING

Mixing height 1000 - 1700 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1000 - 2000 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.

OUTLOOK:

THURSDAY

In the north mixing height below 1000 ft during the morning rising to 2200 to 3200 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2200 to 3200 ft during the afternoon.  Transport wind ESE to S at 6 - 10 mph during the morning becoming SSW to SW at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming S to SW at 4 - 8 mph during the afternoon.

FRIDAY

Mixing height below 1000 ft early rising to 1000 to 1800 ft by late morning rising to 2700 to 3700 ft during the afternoon.  In the north transport and surface winds will be mostly light and variable.  In the south transport winds NNW to NNE at 4 - 8 mph.  Surface wind light and variable during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.

SATURDAY

Mixing height below 1000 ft early rising to 1000 to 1900 ft by late morning rising to 2400 to 3400 ft during the afternoon.  Transport wind N to NE at 5 - 9 mph during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.

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

These instructions are valid for burning conducted on Wednesday, November 10, 2010.

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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.

Zone 602 and 603

No burning allowed.

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 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, 620, and 622

No burning allowed.

Zone 607, 608, and 609

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

Zone 610 and 611

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

Zone 616, 617, and 623

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

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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