SMI West (Smoke Management Instructions) Western Oregon Smoke Management Instructions
ODF Smoke Management Instructions
smi_west at listsmart.osl.state.or.us
Fri Oct 2 14:34:17 PDT 2009
SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY
ISSUED: Friday, October 2, 2009 2:30 PM Nick Yonker
1. DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623
Upper level low will be dropping into the state tonight and tomorrow bringing cool northerly flow over the region. Expect some scattered showers but amounts will be light. Snow level will be 4000 - 5000 ft. Air mass will remain unstable and smoke dispersion good.
OUTLOOK (SUNDAY - TUESDAY)
Upper level low will remain over the region into Sunday but will be drifting to the south. The low will finally weaken and exit the region by Monday with cool, northerly flow remaining as an upper ridge struggles to nose in to the north. Ridge will turn wind flow to offshore on Monday and continue offshore flow through Tuesday. Air mass will remain unstable through Monday before stabilizing Monday night and Tuesday.
2. DISPERSION
Zone 601-612 (North Coast Range and Cascades):
MORNING
Mixing height above 5000 ft.
Transport wind NW to N at 6 - 10 mph.
Surface wind light and variable but favors NW to N.
AFTERNOON
Mixing height above 5000 ft.
Transport wind similar to morning.
Surface wind increases to NW to N at 6 - 12 mph.
EVENING
Mixing height remains above 5000 ft.
Transport wind NW to N at 9 - 15 mph.
Surface wind similar to afternoon.
Zone 615-623 (South Coast Range and Cascades):
MORNING
Mixing height above 5000 ft.
Transport wind NW to N at 6 - 12 mph.
Surface wind light and variable but favors NW tp N.
AFTERNOON
Mixing height above 5000 ft.
Transport wind NNW to NNE at 9 - 15 mph.
Surface wind increases to NW to N at 8 - 12 mph.
EVENING
Mixing height remains above 5000 ft.
Transport wind NNW to NE at 6 - 10 mph.
Surface wind NW to NNE at 5 - 9 mph.
OUTLOOK:
SUNDAY
Mixing height above 5000 ft throughout the day. Transport wind NNW to N at 10 - 16 mph. Surface wind NW to N at 6 - 10 mph.
MONDAY
Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon. Transport wind NNE to ENE at 8 - 14 mph. Surface wind NE to E at 4 - 8 mph during the morning becoming NNW to NE at 6 - 10 mph during the afternoon.
TUESDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 2800 to 3800 ft during the afternoon. Transport wind NE to E at 8 - 14 mph. Surface wind NE to E at 6 - 10 mph during the morning becoming N to NE at 8 - 12 mph during the afternoon.
3. BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Saturday and Sunday, October 3 and 4, 2009.
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For Saturday:
Coast Range
All Zones
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.
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 and 622
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.
Siskiyous
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.
For Sunday:
Coast Range
All Zones
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.
Cascades
Zone 605 and 606
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs. Verify transport winds away from SSRA if burning within 10 miles of the SSRA. Higher tonnage is possible south of T20S in Zone 606. Call the forecaster.
Zone 607 and 608
Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.
Zone 609, 610, 611, 616, 617, and 623
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.
Zone 620 and 622
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.
Siskiyous
Use standard guidance matrix. (See section 5 below.) Ensure adequate distance from downwind SSRAs for smoke to dissipate.
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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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