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

Wed Jun 3 14:29:43 PDT 2009

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

ISSUED: Wednesday, June 3, 2009       2:30 PM      Nick Yonker

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

Upper level low will essentially remain in place along the central California coast, rotating clouds and moisture over the region from the east to southeast.  Expect an increased threat of showers and thundershowers over much of the state, especially south.  Air mass will be stable during the night and early morning hours, gradually destabilizing during the afternoon.  Wind flow will be light and erratic, mainly favoring a south to northwest flow.  Smoke dispersion should be mostly poor to fair.

    OUTLOOK (FRIDAY - SUNDAY)

Upper level low starts weakening on Friday and shifts inland over the weekend, becoming a trough over the intermountain region.  Air mass will gradually dry out and showers decrease.  Expect mostly fair skies with temperatures near normal.  Air mass will be mostly stable during the morning hours becoming somewhat unstable during the afternoon.  Smoke dispersion will be mostly fair.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft early rising to 1700 - 2700 ft by late morning.
Transport wind S to SSW at 8 - 12 mph.
Surface wind SE to SSW at 5 - 9 mph.

AFTERNOON
Mixing height 2000 - 3000 ft.
Transport wind shifts to SW to W at 10 - 18 mph.
Surface wind S to SW at 4 - 8 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind WSW to WNW at 10 - 20 mph.
Surface wind shifts to SW to W at 5 - 9 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning.
Transport wind S to SW at 4 - 8 mph.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 3500 - 4500 ft.
Transport wind shifts to SW to WNW at 6 - 10 mph.
Surface wind similar to morning.

EVENING
Mixing height 3500 - 4500 ft.
Transport wind W to NW at 8 - 14 mph.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft early rising to 2800 - 3800 ft by late morning.
Transport wind SW to W at 5 - 9 mph.
Surface wind light and variable but favors S to W and controlled by local terrain.

AFTERNOON
Mixing height rising to 4000 - 5000 ft.
Transport wind SW to W at 8 - 12 mph.
Surface wind increases to SW to WNW at 6 - 10 mph.

EVENING
Mixing height 4000 - 5000 ft.
Transport wind SW to WSW at 8 - 14 mph.
Surface wind SW to W at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning.
Transport wind light and variable but favors SW to W.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to WSW to WNW at 5 - 9 mph.
Surface wind increases to WSW to WNW at 5 - 9 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind similar to afternoon.
Surface wind W to NW at 6 - 10 mph.

OUTLOOK:

FRIDAY
Mixing height 3000 to 4000 ft during the morning rising to 4200 to 5000 ft during the afternoon.  Transport wind WSW to NW at 4 - 8 mph.  Surface wind light and variable during the morning becoming WSW to NW at 5 - 9 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 3300 to 4300 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to WNW at 6 - 10 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind WSW to WNW at 5 - 9 mph.  Surface wind light and variable during the morning becoming WSW to NW 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 Thursday, June 4, 2009.
=================================================================

Coast Range

Zone 601 and 612
Units should be 500 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.)  Avoid burning in or near corridors.  Units may be 500 tons or less, spaced 15 miles apart, south of the Siuslaw River in Zone 603.

Zone 615
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 616 east of R9W and 620
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.  Higher tonnage is possible south of T35S in Zone 620.  Call the forecaster.

Zone 618
Units should be 2000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 619
Units should be 1500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Cascades

Zone 605, 606, 607, 608, 609, 616, 617, 622, 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 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Units should be 1000 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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