SMI West (Smoke Management Instructions) (no subject)

Tue Oct 12 14:41:09 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Tuesday, October 12, 2010       2:30 PM      Jim Little

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

    WEDNESDAY   *** Poor Ventilation Conditions ***
High pressure aloft continues over the Pacific Northwest on Wednesday, but it is moving slowly eastward.  The axis of the high pressure ridge extends from Nevada to Alberta by mid morning, and by early evening has moved to the northern Rockies.  The surface thermal trough that had been offshore will move onshore during the afternoon and the offshore flow of the past few days will become onshore.  With uncertainty as to the time of the projected wind shift and low mixing heights Wednesday will not be a favorable day for burning.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper level ridge will be well to the east by Thursday with southwest flow aloft setting up over the Pacific Northwest.  A weak front will approach the northern Oregon coast during the afternoon but moisture appears to be very limited.  There is a chance for some light rain in the extreme northern zones Thursday afternoon.  Mixing heights will have recovered most areas for more favorable burning conditions.  By Friday models show minor ridging aloft.  Winds will be northerly, maximum mixing heights will be up and burning conditions will continue to improve.  Saturday will see southwesterly flow aloft, onshore transport winds and mixing heights back into the 3500 to 4500 foot range.

2.  DISPERSION

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

MORNING

Mixing height 1000 - 1500 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1300 - 2300 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

EVENING

Mixing height lowers below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

Zone 605-611 (North Cascades):

MORNING

Mixing height near 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1500 - 2500 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

EVENING

Mixing height lowers below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 1000 - 1900 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 light and variable.

Surface wind light and variable and controlled by local terrain.

EVENING

Mixing height lowers below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING

Mixing height 1300 - 2300 ft.

Transport wind ESE to S at 5 - 9 mph.

Surface wind ESE to S at 5 - 9 mph.

AFTERNOON

Mixing height rising to 2500 - 3500 ft.

Transport wind becomes light and variable.

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

EVENING

Mixing height lowers below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

THURSDAY

In the north mixing height below 1000 ft early rising to 1200 to 2200 ft by late morning rising to 2000 to 3000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 2100 to 3100 ft by late morning rising to 3100 to 4100 ft during the afternoon.  Transport wind light and variable during the morning becoming W to NW at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 8 - 12 mph during the afternoon.

FRIDAY

Mixing height below 1000 ft early rising to 1100 to 2100 ft by late morning rising to 3200 to 4200 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 3200 to 4200 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, October 13, 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.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

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.  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.

Cascades

Zone 605 and 606

No burning allowed.

Zone 607, 608, 609, 617, and 623

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

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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