SMI West (Smoke Management Instructions) (no subject)

Mon Feb 7 07:29:13 PST 2011

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, February 7, 2011       7:30 AM      Jim Little

1.  DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES

601-623

A weakening Pacific cold front moved through the Pacific Northwest overnight Sunday night bringing cooler temperatures and moisture to much of western Oregon and the Oregon Cascades.  Mountain locations in northern Oregon generally received between a quarter and a half an inch of precipitation although Rye Mountain recorded six-tenths and Log Creek reported 1.20 inches.  Salem's freezing level was about 4100 feet this morning while the Medford morning sounding showed a freezing level of near 7660 feet.  ODOT traffic cams in the Cascades show snow around Mt Hood but just wet roadway surfaces elsewhere.  Southern location rainfall amounts were much lighter with generally just a few hundredths of an inch of precip being reported.  Showers will continue today and snow levels will lower to around 2500 feet in the north and to about 3000 feet in the south this afternoon.   Mixing heights will be quite high and transport winds should be mostly west-northwesterly for mostly good smoke dispersal conditions.

Showers will taper off Tuesday and transport winds will be more northerly with a dry spell likely mid week with a potential for offshore flow.  Longer range charts indicate a precipitation return over the weekend and a wetter, more seasonal, weather pattern next week.

2.  DISPERSION

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

MORNING

Mixing height 2800 - 3800 ft.

Transport wind WNW to NW at 18 - 30 mph.

Surface wind WNW to NW at 10 - 22 mph.

AFTERNOON

Mixing height 3400 - 4400 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 3000 - 4000 ft.

Transport wind WNW to NNW at 14 - 28 mph.

Surface wind WNW to NNW at 9 - 15 mph.

Zone 605-611 (North Cascades):

MORNING

Mixing height 2900 - 3900 ft.

Transport wind WSW to WNW at 10 - 16 mph.

Surface wind WSW to WNW at 10 - 18 mph.

AFTERNOON

Mixing height rising to 4000 - 5000 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height 2200 - 3200 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 2600 - 3600 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 3300 - 4300 ft.

Transport wind increases to NW to N at 9 - 15 mph.

Surface wind increases to NW to N at 8 - 14 mph.

EVENING

Mixing height 3300 - 4300 ft.

Transport wind NW to N at 6 - 10 mph.

Surface wind WNW to NNW at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height 2200 - 3200 ft.

Transport wind WNW to NNW at 8 - 12 mph.

Surface wind WNW to NNW at 8 - 12 mph.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind WNW to NW at 10 - 18 mph.

Surface wind WNW to NW at 10 - 16 mph.

EVENING

Mixing height 2800 - 3800 ft.

Transport wind decreases to WNW to NNW at 6 - 10 mph.

Surface wind WNW to NNW at 6 - 10 mph.

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

These instructions are valid for burning conducted on Monday, February 7, 2011.

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

Coast Range

Zone 601, 612, and 616 east of R9W

Units should be 750 tons or less, spaced 10 miles apart, and 12 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.  Restrict units to 500 tons or less south of T30S in Zone 616.

Zone 602 and 603

Units should be 300 tons or less, spaced 10 miles apart, and 12 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.

Zone 615

Units should be 2000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 616 west of R8W

Units should be 1200 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 618 and 619

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

Zone 620

No burning allowed.  Some burning allowed south of the Rogue River.  Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 609, 616, 617, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T15S through T20S in Zone 608 units should be 1000 tons or less, spaced 8 miles apart.

Zone 610 and 611

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

Zone 620

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

Zone 622

Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  East of R2W, use standard guidance matrix. (See section 5 below.)

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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