SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, August 1, 2025 2:30 PM Gary Votaw

1. DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623 and 639

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*** Constructed For Guidance (Clearance by Phone Only) ***

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********************** Off-Season Instructions **********************

Written forecasts/instructions have ended for the summer.

Verbal smoke clearance must be obtained for all prescribed burning by calling the ODF forecast office at 503-945-7401.

Office hours are Monday – Friday from 7 a.m. until 5 p.m. (closed weekends/holidays).

Written forecasts will resume in October.

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2. DISPERSION

SATURDAY

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

MORNING

Mixing height below 1000 ft early rising to 2000 - 3000 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 2700 - 3700 ft.

Transport wind increases to WNW to NNW at 6 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1800 ft.

Transport wind WNW to NW at 9 - 15 mph.

Surface wind increases to W to NNW at 6 - 10 mph.

Zone 605-611 and 639 (North Cascades):

MORNING

Mixing height below 1000 ft early rising to 2900 - 3900 ft.

Transport wind WSW to NW at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 4300 - 5000 ft.

Transport wind WSW to WNW at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1900 ft.

Transport wind shifts to NNW to NNE at 4 - 8 mph.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1000 ft early rising to 2300 - 3300 ft.

Transport wind NNW to NE at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 3500 - 4500 ft.

Transport wind NW to N at 6 - 10 mph.

Surface wind increases to WNW to NNW at 5 - 9 mph.

EVENING

Mixing height 1700 - 2700 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 1000 ft early rising to 2500 - 3500 ft.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising above 5000 ft.

Transport wind increases to WSW to NW at 6 - 10 mph.

Surface wind similar to morning.

EVENING

Mixing height 2400 - 3400 ft.

Transport wind shifts to NW to N at 6 - 10 mph.

Surface wind shifts to WNW to NNW at 5 - 9 mph.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3900 to 4900 ft during the afternoon. Transport wind WNW to NNW at 4 - 8 mph. Surface wind light and variable.

MONDAY

Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising to 3600 to 4600 ft during the afternoon. Transport wind WNW to NNW at 4 - 8 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon. Surface wind WNW to NNW at 4 - 8 mph.

TUESDAY

Mixing height below 1000 ft early rising to 2100 to 3100 ft by late morning rising to 3800 to 4800 ft during the afternoon. Transport wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon. Surface wind light and variable during the morning becoming W to NNW at 4 - 8 mph during the afternoon.

3. BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA

- Valid for burning done Saturday through Tuesday, August 2 through 5, 2025.

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For Saturday:

Coast Range

Zone 601 and 612

Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs. Restrict units in or near corridors to 500 tons or less.

Zone 602 and 603

Units should be 400 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs. Limit burning in or near corridors. Higher tonnage is possible south of the Siuslaw River 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 6 miles apart, and 8 miles from downwind SSRAs.

Zone 616 east of R9W

Units should be 1000 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. Restrict units to 500 tons or less south of T30S.

Zone 620

Units should be 600 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. Higher tonnage is possible south of the Rogue River. Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 639, 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 1200 tons or less, spaced 6 miles apart.

Zone 610

Units should be 1200 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 611

Units should be 1500 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 620

Units should be 1200 tons or less, spaced 3 miles apart, and 5 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

Zone 601 and 612

Units should be 1000 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. Restrict units in or near corridors to 500 tons or less.

Zone 602 and 603

Units should be 400 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. Limit burning in or near corridors. Higher tonnage is possible south of the Siuslaw River in Zone 603. Call the forecaster.

Zone 615

Units should be 1500 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 616 west of R8W

Units should be 1200 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 616 east of R9W

Units should be 750 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 618 and 619

Use standard guidance matrix. (See section 5 below.)

Zone 620

Units should be 600 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. Higher tonnage is possible south of T35S. Call the forecaster.

Cascades

Zone 605, 606, 607, 608, 639, 616, 617, and 623

Zone 610 and 622

Units should be 1200 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. East of R2W in Zone 622, use standard guidance matrix - see section 5 below.

Zone 611

Units should be 1500 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 620

Units should be 750 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Siskiyous

Use standard guidance matrix - see section 5 below. Ensure adequate distance from downwind SSRAs for smoke to dissipate.

For Monday:

Coast Range

Zone 601, 612, and 616 east of R9W

Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs. Restrict units in or near corridors to 500 tons or less. Restrict units to 500 tons or less south of T30S in Zone 616.

Zone 602 and 603

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 8 miles apart, and 10 miles from downwind SSRAs.

Zone 620

Units should be 300 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, 639, 611, 616, 617, and 623

Use standard guidance matrix - see section 5 below. Ensure adequate distance from downwind SSRAs for smoke to dissipate. From T12S through T17S in Zone 608 units should be 1200 tons or less, spaced 6 miles apart. South of T30S in Zone 616 units should be 1000 tons or less, spaced 3 miles apart.

Zone 610

Units should be 1200 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.

Zone 620 and 622

Units should be 750 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs. East of R2W in Zone 622, use standard guidance matrix - see section 5 below.

Siskiyous

Use standard guidance matrix - see section 5 below.

For Tuesday:

Coast Range

Zone 601, 612, and 616 east of R9W

Zone 602 and 603

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 8 miles apart, and 10 miles from downwind SSRAs.

Zone 620

Units should be 300 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, 639, 611, 616, 617, and 623

Zone 610

Units should be 1200 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs.

Zone 620 and 622

Units should be 750 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs. East of R2W in Zone 622, use standard guidance matrix - see section 5 below.

Siskiyous

Use standard guidance matrix - see section 5 below.

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4. SPECIAL NOTES:

The ODF forecast smoke zones differ from the NWS fire zones and

are available at:

https://www.oregon.gov/odf/fire/documents/smoke-forecast-zone-map.pdf

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 they will return your call as soon as possible.

Avoid calling between 1:30 to 2:45 p.m.

The forecast is available on the Internet at:

http://www.odf.state.or.us/DIVISIONS/protection/fire_protection/

Daily/smi.htm

Please ensure your units have been planned and accomplished by

checking: http://www.oregon.gov/ODF/Fire/Pages/Burn.aspx

A map of planned and/or accomplished burns is located at:

http://geo.maps.arcgis.com/apps/webappviewer/index.html

?id=a7e321dc8fc444b7a33fbc67bc673a3b

The forecast/instruction telephone recording is: (503) 945-7400.

To subscribe to or unsubscribe from the email list for this

product, please go to the link:

http://weather.smkmgt.com/mailman/listinfo/

5. STANDARD GUIDANCE MATRIX:

* Greater than 5000 ft mixing height: Limit to 150 tons per mile

from downwind SSRAs. Example: 75 tons allowed if burned a half

mile from a downwind SSRA.

* 3000 - 5000 ft mixing height: Limit to 50 tons per mile if burning

within 5 miles of downwind SSRAs. Limit to 100 tons per mile if

burning 5 miles or beyond downwind SSRAs.

Example #1: 200 tons allowed if burned 4 miles from a downwind SSRA.

Example #2: 500 tons allowed if burned 5 miles from a downwind SSRA.

* Less than 3000 ft mixing height: No burning within 5 miles of

downwind SSRAs. Limit to 60 tons per mile from downwind SSRAs.

Example: 300 tons allowed if burned 5 miles from a downwind SSRA.

* Ensure adequate spacing between units when burning near downwind

SSRAs.

* Use of polyethylene (PE) sheeting on greater than 75 percent of

piles in a unit with 60 percent coverage per pile will allow a

50 percent increase in tonnage over the existing instruction tonnage

for that zone.

* All exceptions must be coordinated with the duty forecaster

prior to ignition.

6. BURN MONITORING:

Burns over 2000 tons must be monitored (OAR 629-048-0230(3) -

7/1/14). Monitoring of all burns is highly recommended for both

smoke management purposes and wildfire potential.