SMI West (Smoke Management Instructions) (no subject)

Tue Feb 1 13:13:01 PST 2011

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Tuesday, February 1, 2011       2:30 PM      Jim Little

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

    WEDNESDAY

Wednesday will see a strong upper level ridge over the area with its axis from well off the California coast to southern Alberta.  Upper level flow over the region will be northerly.  At the surface a thermal trough will be offshore but will be shifting eastward late in the day.  Surface winds will be mostly light northeasterly over the region.  Generally poor smoke dispersal conditions continue with mixing heights mostly in the 1000 to 2000 foot range.  An air stagnation advisory remains in effect in the Rogue Valley.

    OUTLOOK (THURSDAY - SATURDAY)

The upper ridge broadens and intensifies for continued dry weather on Thursday.  Low level flow shifts to onshore or southwesterly in the north and to northerly for southern zones.  Mixing heights improve slightly.  On Friday a weak system moves into Washington with a chance of sprinkles near the Columbia River.  Expect a slight improvement in mixing heights in the Cascades otherwise little change.  Saturday expect continued poor ventilation conditions with mixing heights generally around 2000 feet.

2.  DISPERSION

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

MORNING

Mixing height near 1000 ft.

Transport wind ENE to ESE at 6 - 10 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1000 - 1500 ft.

Transport wind NE to E at 4 - 8 mph.

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 below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1000 - 1800 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 1000 - 1600 ft.

Transport wind ESE to SSE at 8 - 12 mph.

Surface wind ESE to SSE at 6 - 10 mph.

AFTERNOON

Mixing height 1300 - 2300 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 similar to afternoon.

Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 1000 ft.

Transport wind E to SE at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 1400 - 2400 ft.

Transport wind becomes light and variable.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

THURSDAY

Mixing height below 1000 ft during the morning rising to 1200 to 2200 ft during the afternoon.  Transport wind light and variable during the morning becoming W to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.

FRIDAY

Mixing height below 1000 ft during the morning rising to 1000 to 2000 ft during the afternoon.  Transport wind NNW to NNE at 4 - 8 mph.  Surface wind E to SSE at 4 - 8 mph during the morning becoming NW to N at 4 - 8 mph during the afternoon.

SATURDAY

Mixing height below 1000 ft during the morning rising to 1600 to 2600 ft during the afternoon.  Transport wind NW to NNE at 6 - 10 mph.  Surface wind WNW to NNW at 4 - 8 mph during the morning becoming light and variable during the afternoon.

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

These instructions are valid for burning conducted on Wednesday, February 2, 2011.

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

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

Zone 616 east of R9W

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

Zone 620

No burning allowed.

Cascades

Zone 605, 606, 620, and 622

No burning allowed.

Zone 607, 608, and 616

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

Zone 617 and 623

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

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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