SMI West (Smoke Management Instructions) (no subject)

Sun Nov 14 15:11:24 PST 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Sunday, November 14, 2010       2:30 PM      Jim Little

1.  DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623
    MONDAY
Upper air charts show a high pressure area centered about 600 miles west of San Francisco and an upper level disturbance moving across the top of the high into British Columbia.  This helps maintain a weak warm front that moves over the Pacific Northwest bringing light rain to northern sections of Oregon.  Upper level winds will be northwesterly.  Expect mostly cloudy skies with light rain in the north, and just mostly cloudy skies in the south. Low level winds will be onshore, generally westerly to southwesterly in the north and northwesterly to north in the south.  Warm air aloft with the warm front will stabilize the atmosphere for reduced maximum mixing heights.  Look for marginal smoke dispersal conditions in the north and poor conditions in the south.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
The upper disturbance moves British Columbia and northern Washington early Tuesday - cooler temperatures aloft behind this system will allow for higher maximum mixing heights and improved ventilation conditions. Transport winds will be generally northwest to southwest in the north and light northwest to northeast in the south.
By Wednesday a deep low in the Gulf of Alaska, both at the surface and aloft, begins to influence weather in the Pacific Northwest.  Winds turn southerly both at the surface and aloft.  A surface cold front moves into western Washington then drops south into northwest Oregon by afternoon.  The cold front presses through with rain and snow Thursday morning.  The snow level will drop to near 1000 feet in the north and 2000 feet in the south before rising again Thursday afternoon. Expect marginal to fair smoke dispersal conditions Wednesday and Thursday.

2.  DISPERSION

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

MORNING

Mixing height 1000 - 1800 ft.

Transport wind SW to WSW at 8 - 12 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1800 - 2800 ft.

Transport wind increases to SW to W at 15 - 25 mph.

Surface wind increases to SW to W at 8 - 14 mph.

EVENING

Mixing height 2000 - 3000 ft.

Transport wind WSW to W at 16 - 30 mph.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height 1000 - 1700 ft.

Transport wind SSW to WSW at 6 - 12 mph.

Surface wind SSW to WSW at 6 - 10 mph.

AFTERNOON

Mixing height 1600 - 2600 ft.

Transport wind increases to SSW to SW at 10 - 22 mph.

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

EVENING

Mixing height 1800 - 2800 ft.

Transport wind SW to WSW at 12 - 22 mph.

Surface wind SW to WSW at 10 - 22 mph.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 1000 - 1800 ft.

Transport wind light and variable.

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 1200 - 2200 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 616-623 (South 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 1000 - 2000 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 1300 - 2300 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

TUESDAY

Mixing height 1000 to 2000 ft during the morning rising to 2400 to 3400 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to WNW at 8 - 14 mph during the afternoon.  Surface wind light and variable.

WEDNESDAY

Mixing height 2800 to 3800 ft throughout the day.  Transport wind WNW to NW at 10 - 22 mph.  Surface wind WSW to NW at 5 - 9 mph.

THURSDAY

Mixing height below 1000 ft early rising to 1400 to 2400 ft by late morning rising to 3400 to 4400 ft during the afternoon.  Transport wind S to SSW at 8 - 14 mph during the morning becoming SSW to SW at 15 - 25 mph during the afternoon.  Surface wind SSE to SSW at 5 - 9 mph.

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

These instructions are valid for burning conducted on Monday, November 15, 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.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603

No burning allowed.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 15 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.

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, 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 15 miles apart, and 15 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

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

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

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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