SMI West (Smoke Management Instructions) (no subject)

Sun Nov 7 14:31:30 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Sunday, November 7, 2010       2:30 PM      Jim Little

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

    MONDAY
Upper troughiness over the Pacific Northwest will be moving east during the day and a broad, flat ridge will be approaching from the west.  This will slowly stabilize the atmosphere but scattered showers will likely persist into the afternoon.  Expect fair smoke dispersal conditions most areas.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
*** Deteriorating Smoke Dispersal Conditions after Tuesday ***
An upper low moves rapidly across the eastern Pacific during the day on Tuesday.  A surface cold front associated with this low will bring rain back to the region.  The rain will reach the coast by early morning and spread eastward for a generally rainy day.  Amounts will mostly be between a third and a half of an inch.  The front and upper low move rapidly through the region and by Wednesday a strong ridge pops up to the west.  Subsidence with this ridge will depress maximum mixing heights.  The low mixing heights throughout the region and mostly light and variable winds in northern zones, will mean only limited burning opportunities.  The upper ridge moves eastward across the region on Thursday with a weak Pacific cold front approaching the northwest corner of the state on Thursday.  This will improve conditions a bit in northern zones, but southwest Oregon will continue to experience poor smoke dispersal conditions.

2.  DISPERSION

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

MORNING

Mixing height 2400 - 3400 ft.

Transport wind WSW to WNW at 8 - 14 mph.

Surface wind WSW to WNW at 6 - 10 mph.

AFTERNOON

Mixing height 2600 - 3600 ft.

Transport wind SW to W at 9 - 15 mph.

Surface wind SW to W at 5 - 9 mph.

EVENING

Mixing height 1000 - 2000 ft.

Transport wind SSW to WSW at 9 - 15 mph.

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

Zone 605-611 (North Cascades):

MORNING

Mixing height 2400 - 3400 ft.

Transport wind SSW to WSW at 6 - 10 mph.

Surface wind SSW to WSW at 5 - 9 mph.

AFTERNOON

Mixing height 2500 - 3500 ft.

Transport wind SSW to WSW at 6 - 10 mph.

Surface wind SSW to WSW at 5 - 9 mph.

EVENING

Mixing height 1500 - 2500 ft.

Transport wind SSE to SSW at 6 - 12 mph.

Surface wind SSE to SSW at 6 - 10 mph.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 2300 - 3300 ft.

Transport wind SW to W at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2400 - 3400 ft.

Transport wind WSW to WNW at 6 - 12 mph.

Surface wind increases to WSW to WNW at 5 - 9 mph.

EVENING

Mixing height 2000 - 3000 ft.

Transport wind shifts to S to SW at 6 - 10 mph.

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

Zone 616-623 (South Cascades):

MORNING

Mixing height 1000 - 1900 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 2400 - 3400 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:

TUESDAY

Mixing height 2700 to 3700 ft throughout the day.  Transport wind SSE to SSW at 12 - 22 mph.  Surface wind SSE to SSW at 8 - 14 mph during the morning becoming S to SW at 9 - 15 mph during the afternoon.

WEDNESDAY

Mixing height below 1000 ft during the morning rising to 1300 to 2300 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY

Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning rising to 1500 to 2500 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 Monday, November 8, 2010.

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

Coast Range

Zone 601 and 612

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603

Units should be 300 tons or less, spaced 10 miles apart, and 12 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 10 miles apart, south of the Siuslaw River in Zone 603.

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 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.  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.  Higher tonnage is possible south of T35S.  Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 609, 610, 617, and 623

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

Zone 611

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

Zone 616

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

Zone 620 and 622

No burning allowed.

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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