SMI West (Smoke Management Instructions) Western Oregon Smoke Management Instructions

Mon Jun 14 14:28:34 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, June 14, 2010       2:30 PM      Jim Little

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

    TUESDAY

An upper level low drops in from the northwest during the day Tuesday.  This will keep skies mostly cloudy and there will be a little light rain.  Totals will generally be less than a tenth of an inch.  Relatively cool air aloft will destabilize the atmosphere and help push maximum mixing heights to above 5000 feet.  Low level flow will be generally onshore or northwesterly during the day except more northerly transport winds are likely over the south coast range.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper low moves southeast into southern Idaho on Wednesday.  Cooler daytime temperatures will limit maximum mixing heights a bit but smoke dispersal conditions should be at least fair to good most areas.  Expect a chance of light rain.  By Thursday the upper level low will move east northeast into south-central Canada.  Flow will continue mostly onshore but the rain will be ending during the day.  Friday looks dry but cloudy.  Mixing heights both Thursday and Friday should be fairly high yielding generally good smoke dispersal conditions.

2.  DISPERSION

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

MORNING
Mixing height 2300 - 3300 ft.
Transport wind NW to NNW at 9 - 15 mph.
Surface wind WNW to NNW at 6 - 12 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind WNW to NNW at 10 - 22 mph.
Surface wind WNW to NNW at 10 - 18 mph.

EVENING
Mixing height 1700 - 2700 ft.
Transport wind WNW to NW at 10 - 20 mph.
Surface wind WNW to NW at 8 - 12 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height 2400 - 3400 ft.
Transport wind WSW to NW at 5 - 9 mph.
Surface wind WSW to NW at 6 - 10 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind WNW to NNW at 5 - 9 mph.
Surface wind WNW to NNW at 6 - 10 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 4200 - 5000 ft.
Transport wind NNW to NNE at 8 - 14 mph.
Surface wind NNW to NNE at 8 - 14 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to NNW to N at 12 - 24 mph.
Surface wind increases to NNW to N at 12 - 22 mph.

EVENING
Mixing height 2600 - 3600 ft.
Transport wind NW to N at 10 - 20 mph.
Surface wind NW to N at 10 - 16 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height 2200 - 3200 ft.
Transport wind NW to N at 8 - 12 mph.
Surface wind NW to N at 8 - 14 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind NW to N at 10 - 18 mph.
Surface wind NW to N at 10 - 18 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 3200 to 4200 ft during the afternoon.  Transport wind W to NW at 5 - 9 mph.  Surface wind light and variable during the morning becoming W to NW at 6 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to N at 5 - 9 mph during the afternoon.  Surface wind light and variable.

FRIDAY
Mixing height 2100 to 3100 ft during the morning rising to 4200 to 5000 ft during the afternoon.  Transport wind N to NE at 4 - 8 mph.  Surface wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Tuesday, June 15, 2010.
=================================================================

Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Restrict units in or near corridors to 500 tons or less.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.

Zone 602, 603, and 620
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Avoid burning in or near corridors.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.  Higher tonnage is possible south of the Rogue River in Zone 620.  Call the forecaster.

Zone 615, 618, and 619
Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of the North Bend/Coos Bay SSRA.

Zone 616 west of R8W
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Restrict units to 500 tons or less south of T30S.

Cascades

Zone 605, 606, 607, 608, 609, 611, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T12S through T17S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.  South of T30S in Zone 616 units should be 500 tons or less, spaced 5 miles apart.  South of T30S in Zone 617 units should be 750 tons or less, spaced 5 miles apart.

Zone 610
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 620 and 622
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

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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