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

Wed Jun 23 09:11:17 PDT 2010

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

ISSUED: Wednesday, June 23, 2010       7:30 AM  Update    Nick Yonker

****Update needed because transport and surface winds are turning onshore earlier than expected from yesterday's forecast.****

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

Upper level trough is moving into the Pacific Northwest quicker than earlier anticipated.  Onshore flow has begun over the northern half of the state and wind flow is rather variable over the southern half.  Expect increasing onshore flow today and will thus have to reduce burning opportunities in the Coast Range.

2.  DISPERSION

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

MORNING
Mixing height below 1000 ft early rising to 1500 - 2500 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 2200 - 3200 ft.
Transport wind WNW to NNW at 8 - 12 mph.
Surface wind increases to WNW to NNW at 6 - 10 mph.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind WNW to NNW at 10 - 18 mph.
Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft early rising to 1700 - 2700 ft by late morning.
Transport wind WNW to NNW at 4 - 8 mph.
Surface wind WNW to NNW at 4 - 8 mph.

AFTERNOON
Mixing height rising to 3300 - 4300 ft.
Transport wind NW to N at 5 - 9 mph.
Surface wind becomes light and variable but favors W to NW and controlled by local terrain.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind WNW to NNW at 9 - 15 mph.
Surface wind increases to WNW to NNW at 6 - 10 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning.
Transport wind light and variable but favors NNW to NNE and controlled by local terrain.
Surface wind light and variable but favors NNW to NNE and controlled by local terrain.

AFTERNOON
Mixing height rising to 2200 - 3200 ft.
Transport wind NW to N at 4 - 8 mph.
Surface wind similar to morning.

EVENING
Mixing height lowers below 1000 ft after sunset.
Transport wind similar to afternoon.
Surface wind increases to NW to N at 4 - 8 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 1000 ft early rising to 1900 - 2900 ft by late morning.
Transport wind light and variable but favors NW to N and controlled by local terrain.
Surface wind light and variable but favors NW to NNE and controlled by local terrain.

AFTERNOON
Mixing height rising to 4400 - 5000 ft.
Transport wind increases to NW to N at 8 - 12 mph.
Surface wind increases to NW to N at 6 - 10 mph.

EVENING
Mixing height lowers below 2000 ft after sunset.
Transport wind NW to N at 5 - 9 mph.
Surface wind increases to NW to N at 5 - 9 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Wednesday, June 23, 2010.
=================================================================

Coast Range

Zone 601, 612, and 616 east of R9W
Units should be 500 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, 603, and 620
No burning allowed.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.  Some burning allowed south of T35S in Zone 620.  Call the forecaster.

Zone 615 and 616 west of R8W
Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

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

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.  South of T30S in Zone 616 units should be 500 tons or less, spaced 8 miles apart.  South of T30S in Zone 617 units should be 750 tons or less, spaced 8 miles apart.

Zone 610
Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 620 and 622
Units should be 300 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Units should be 1000 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.

Nick Yonker
Meteorology Manager
Oregon Department of Forestry
503-945-7451

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_west/attachments/20100623/7686a5ec/attachment.html>