SMI West (Smoke Management Instructions) (no subject)

Mon Dec 6 07:22:01 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, December 6, 2010       7:30 AM      Jim Little

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

Upper air charts show a strong low about 900 miles west of Oregon and a broad upper level ridge over the western plains states.  In between a well defined upper disturbance is moving from SW to NE over the state.  There is some moisture associated with this disturbance and there are areas of precipitation western Oregon and the Cascades.  Freezing levels this morning were quite high although a cold surface high east of the Cascades is keeping snow a possibility down to pass levels in the mountains.

Radar this morning shows most of the precipitation is in the northern Cascades and northern Willamette Valley or over northeastern California.

Mixing heights will be on the increase today with much of the region seeing maximum mixing heights this afternoon in the 4 to 5000 foot range.  The exception will be the southern Cascades where mixing heights will remain a bit suppressed.

2.  DISPERSION

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

MORNING

Mixing height 1000 - 1900 ft.

Transport wind ESE to SE at 9 - 15 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 4000 - 5000 ft.

Transport wind SE to S at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 3500 - 4500 ft.

Transport wind increases to S to SSW at 13 - 25 mph.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height 3300 - 4300 ft.

Transport wind ESE to SSE at 8 - 12 mph.

Surface wind ESE to SSE at 6 - 10 mph.

AFTERNOON

Mixing height rising to 4400 - 5000 ft.

Transport wind shifts to S to SW at 8 - 14 mph.

Surface wind shifts to S to SW at 5 - 9 mph.

EVENING

Mixing height rising above 5000 ft.

Transport wind SSE to SSW at 8 - 14 mph.

Surface wind SSE to SSW at 6 - 10 mph.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 3800 - 4800 ft.

Transport wind SE to S at 8 - 14 mph.

Surface wind SE to S at 6 - 12 mph.

AFTERNOON

Mixing height 3600 - 4600 ft.

Transport wind increases to S to SSW at 14 - 28 mph.

Surface wind increases to S to SW at 10 - 20 mph.

EVENING

Mixing height 3300 - 4300 ft.

Transport wind SSE to SSW at 13 - 25 mph.

Surface wind SSE to SSW at 10 - 18 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height 3600 - 4600 ft.

Transport wind SSE to SSW at 10 - 18 mph.

Surface wind SE to S at 8 - 12 mph.

AFTERNOON

Mixing height lowers to 2400 - 3400 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 1700 - 2700 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

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

These instructions are valid for burning conducted on Monday, December 6, 2010.

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

Coast Range

Zone 601 and 612

Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 602 and 603

Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 8 miles apart, south of the Siuslaw River in Zone 603.

Zone 615, 616, 618, 619, and 620

Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of the North Bend/Coos Bay SSRA.

Cascades

Zone 605, 606, 607, 608, 609, 610, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.

Zone 611

Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

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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