SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

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

ISSUED: Tuesday, June 29, 2010       2:30 PM      Jim Little

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

    WEDNESDAY

Cool weather will continue. A broad upper trough remains over the eastern Pacific and the Pacific Northwest on Wednesday.  Most areas will see clouds in the morning with the north becoming partly sunny in the afternoon and southern sections becoming mostly sunny.  Low level flow will be onshore.  Temperatures will be 3 to 7 degrees below average in the south and 7 to 10 degrees below average in the interior.  Mixing heights should climb to above 4000 feet throughout the region for fair to good smoke dispersal conditions.

    OUTLOOK (THURSDAY-SATURDAY)

A progressive disturbance moving across the Pacific Ocean deepens the trough over the area on Thursday.  This supports a weak Pacific front that will move onshore late in the day.  Winds turn southerly ahead of this front then westerly as it passes through.  Best timing on frontal passage right now looks to be Thursday evening.  This will bring some light rain, mainly to northern sections.  Warm southerly flow aloft ahead of the weak front together with surface temperatures anywhere from 5 to 15 degrees below average will suppress mixing heights somewhat for only fair smoke dispersal conditions.  The upper trough axis will pass to the east Friday morning leaving a cool west-northwesterly flow aloft.  Low level flow will be back to northwesterly onshore, temperatures will run 5 to 10 degrees below average in the interior.  There will be a slight chance of showers in northern sections.  Saturday the low level onshore flow will continue with still a slight chance of a shower north, otherwise expect morning clouds with partial afternoon clearing most areas with maximum mixing heights around 4000 through much of the region.


2.  DISPERSION

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

MORNING
Mixing height 3000 - 4000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 4300 - 5000 ft.
Transport wind increases to NW to N at 8 - 14 mph.
Surface wind increases to NW to N at 8 - 12 mph.

EVENING
Mixing height 1700 - 2700 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height 2900 - 3900 ft.
Transport wind NNW to NNE at 6 - 10 mph.
Surface wind NW to NNE at 6 - 10 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind similar to morning.
Surface wind similar to morning.

EVENING
Mixing height 3900 - 4900 ft.
Transport wind similar to afternoon.
Surface wind NW to NNE at 4 - 8 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 3000 - 4000 ft.
Transport wind NNW to NNE at 8 - 12 mph.
Surface wind NNW to NNE at 8 - 12 mph.

AFTERNOON
Mixing height 3800 - 5000 ft.
Transport wind increases to NW to N at 10 - 16 mph.
Surface wind NW to N at 10 - 16 mph.

EVENING
Mixing height 1500 - 2500 ft.
Transport wind NW to N at 6 - 12 mph.
Surface wind NW to N at 6 - 12 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height 3000 - 4000 ft.
Transport wind WSW to NW at 6 - 12 mph.
Surface wind WSW to WNW at 8 - 12 mph.

AFTERNOON
Mixing height rising to 4300 - 5000 ft.
Transport wind similar to morning.
Surface wind similar to morning.

EVENING
Mixing height 3100 - 4100 ft.
Transport wind similar to afternoon.
Surface wind WNW to NNW at 6 - 10 mph.

OUTLOOK:

THURSDAY
In the north mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning and through the afternoon.  In the south mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 3800 to 4800 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to W at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W at 6 - 10 mph during the afternoon.

FRIDAY
In the north mixing height below 1000 ft early rising to 3400 to 4400 ft by late morning rising to 4200 to 5000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 1800 to 2800 ft by late morning rising to 3400 to 4400 ft during the afternoon.  Transport wind NW to N at 4 - 8 mph.  Surface wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.

SATURDAY
In the north mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning and through the afternoon.  Transport wind NW to NNE at 4 - 8 mph.  Surface wind NW to N at 4 - 8 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Wednesday, June 30, 2010.
=================================================================

Coast Range

***Complete ignitions by 2:00pm in Zone 601, 612 and 615.***

Zone 601, 612, and 616 east of R9W
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  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 8 miles apart, and 10 miles from downwind SSRAs.

Zone 615
Units should be 2000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 618 and 619
Use standard guidance matrix. (See section 5 below.)

Zone 620
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of the Rogue River.  Call the forecaster.


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.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.

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

Zone 620
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 622
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  East of R2W, use standard guidance matrix. (See section 5 below.)


Siskiyous
Units should be 1500 tons or less, spaced 8 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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