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

Wed Oct 7 14:30:11 PDT 2009

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

ISSUED: Wednesday, October 7, 2009       2:30 PM      Nick Yonker

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

Upper level ridge will remain anchored off the Pacific Northwest coast through tomorrow keeping skies mostly clear and temperatures pleasant.  Air mass will remain mostly stable.  Light to moderate NW to N winds will keep smoke dispersion poor to fair.

    OUTLOOK (FRIDAY - SUNDAY)

A mostly dry cold front will drop down from the north on Friday bringing some clouds and a chance of sprinkles in the north.  Cooler air will move in aloft and destabilize the air mass somewhat.  Cooler, northerly flow will remain over the region through Saturday before getting driven eastward by the ridge in the eastern Pacific on Sunday.  Wind flow will turn offshore.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft early rising to 1200 - 2200 ft by late morning.
Transport wind NW to NNE at 6 - 10 mph.
Surface wind NNW to NNE at 4 - 8 mph.

AFTERNOON
Mixing height 1300 - 2300 ft.
Transport wind increases to NW to N at 10 - 18 mph.
Surface wind WNW to NNW at 8 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind WNW to NNW at 6 - 12 mph.
Surface wind W to NNW at 4 - 8 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.
Transport wind WNW to NNW at 5 - 9 mph.
Surface wind light and variable but favors W to N and controlled by local terrain.

AFTERNOON
Mixing height rising to 3300 - 4300 ft.
Transport wind NW to N at 9 - 15 mph.
Surface wind increases to WNW to NNW at 6 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind WNW to NNW at 6 - 10 mph.
Surface wind becomes light and variable but favors W to N and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.
Transport wind light and variable but favors NW to NNE.
Surface wind light and variable but favors NW to NNE.

AFTERNOON
Mixing height 1800 - 2800 ft.
Transport wind increases to NNW to N at 10 - 18 mph.
Surface wind increases to NW to N at 8 - 14 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind similar to afternoon.
Surface wind NNW to NE at 5 - 9 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.
Transport wind WNW to NNW at 4 - 8 mph.
Surface wind light and variable but favors W to N and controlled by local terrain.

AFTERNOON
Mixing height rising to 4000 - 5000 ft.
Transport wind NW to N at 8 - 12 mph.
Surface wind increases to WNW to NNW at 6 - 12 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind WNW to NNW at 5 - 9 mph.
Surface wind becomes light and variable but favors W to N and controlled by local terrain.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3200 to 4200 ft during the afternoon.  Transport wind NW to N at 5 - 9 mph.  Surface wind light and variable during the morning becoming NNW to NNE at 6 - 12 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind NE to E at 4 - 8 mph during the morning becoming N to NE at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming N to NE at 5 - 9 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 2000 to 3000 ft during the afternoon.  Transport wind NE to E at 5 - 9 mph.  Surface wind light and variable during the morning becoming NNE to ENE at 5 - 9 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Thursday, October 8, 2009.
=================================================================

Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of Waldport in Zone 612.  Call the forecaster.

Zone 602 and 603
No burning allowed.  Some burning is possible south of T17S in Zone 603.  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 15 miles apart, and 15 miles from downwind SSRAs.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 620
Units should be 500 tons or less, spaced 15 miles apart, and 15 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 and 616 south of T30S
Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 620 and 622
Units should be 500 tons or less, spaced 8 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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