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

Fri May 21 14:28:05 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, May 21, 2010       2:30 PM      Pete Parsons

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

SATURDAY

A cold upper-level trough will remain over Oregon with numerous showers and a chance of afternoon thunderstorms.  Once again, maximum temperatures will be 10-15 degrees below normal.  Morning snow levels will be near 2500 feet and only rise to around 3000 feet in the afternoon.  Higher terrain should pick up a few inches of new snow.  High mixing heights will make for good smoke dispersal conditions.

    OUTLOOK (SUNDAY-TUESDAY)

The upper-level trough will slowly push east of the region Sunday and Monday with a progressively drier, more stable, and warmer northwesterly flow aloft.  Skies should become just partly cloudy by Monday with only a chance of mainly mountain showers.  The snow level is forecast to lift to around 6000 feet with maximum temperatures recovering to within about 5 degrees of normal. Clearing skies will allow morning inversions to form, but cool air aloft will maintain high afternoon mixing heights with good daytime smoke dispersal conditions.  A strong jet stream is forecast to direct another Pacific storm onshore Tuesday with more rain and higher elevation snow likely.

2.  DISPERSION

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

MORNING

Mixing height 3200 - 4200 ft.

Transport wind SSW to WSW at 8 - 12 mph.

Surface wind SSW to WSW at 6 - 10 mph.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind shifts to WSW to WNW at 10 - 16 mph.

Surface wind shifts to WSW to NW at 6 - 10 mph.

EVENING

Mixing height 2300 - 3300 ft.

Transport wind WNW to NNW at 10 - 20 mph.

Surface wind W to NNW at 6 - 12 mph.

Zone 605-611 (North Cascades):

MORNING

Mixing height 1000 - 1800 ft.

Transport wind SSW to WSW at 9 - 15 mph.

Surface wind SSW to WSW at 6 - 10 mph.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind shifts to WSW to WNW at 9 - 15 mph.

Surface wind WSW to WNW at 8 - 12 mph.

EVENING

Mixing height 3000 - 4000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height 3300 - 4300 ft.

Transport wind SW to WNW at 6 - 12 mph.

Surface wind WSW to NW at 5 - 9 mph.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind WNW to NW at 8 - 12 mph.

Surface wind WNW to NW at 8 - 12 mph.

EVENING

Mixing height 2700 - 3700 ft.

Transport wind WNW to NNW at 10 - 18 mph.

Surface wind WNW to NNW at 6 - 10 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height 3300 - 4300 ft.

Transport wind SW to WNW at 5 - 9 mph.

Surface wind WSW to NW at 5 - 9 mph.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind WNW to NW at 8 - 12 mph.

Surface wind WNW to NW at 8 - 12 mph.

EVENING

Mixing height 2000 - 3000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 3800 to 4800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 5 - 9 mph.  Surface wind W to NNW at 4 - 8 mph.

MONDAY

Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to WNW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to WNW at 4 - 8 mph during the afternoon.

TUESDAY

Mixing height below 1000 ft early rising to 3900 to 4900 ft by late morning rising above 5000 ft during the afternoon.  Transport wind ESE to SSE at 10 - 20 mph during the morning becoming S to SSW at 18 - 32 mph during the afternoon.  Surface wind ESE to SSE at 6 - 10 mph during the morning becoming SSW to SW at 10 - 18 mph during the afternoon.

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

These instructions are valid for burning conducted on Saturday, May 22, 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.

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 T35S in Zone 620.  Call the forecaster.

Zone 615

Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W

Units should be 1200 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.

Zone 618

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

Zone 619

Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

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 5 miles apart.

Zone 610, 611, and 622

Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  East of R2W in Zone 622, use standard guidance matrix. (See section 5 below.)

Zone 620

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

Siskiyous

Units should be 1500 tons or less, spaced 5 miles apart, and 10 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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