SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, September 12, 2025 2:30 PM Sherri Pugh

1. DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 637-646

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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

Mixing height below 500 ft early rising to 2000 - 3000 ft by late morning. Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain. Transport wind increases to WNW to NNW at 4 - 8 mph during the evening.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning and through the afternoon. Transport wind WSW to WNW at 5 - 9 mph. Surface wind light and variable during the morning becoming W to NNW at 4 - 8 mph during the afternoon.

MONDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon. Transport wind light and variable. Surface wind light and variable.

TUESDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon. Transport wind ESE to S at 4 - 8 mph. Surface wind light and variable during the morning becoming ESE to S at 4 - 8 mph during the afternoon.

3. BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 637-646

- Valid for burning done Saturday through Tuesday, September 13 through 16, 2025.

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For Saturday:

Follow standard guidance matrix - see section 5 below - for burning units in all directions of SSRAs. For units that will smolder significantly through the night avoid burning within at least 25 miles in all directions of SSRAs. Watch for shifting transport winds. No additional restrictions necessary.

For Sunday:

Follow standard guidance matrix - see section 5 below - for burning units to the SSW through NNW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 10 miles to the SSW through NNW in or near drainages leading to SSRAs. Watch for shifting transport winds. No additional restrictions necessary.

For Monday:

For Tuesday:

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4. SPECIAL NOTE:

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

The smoke management forecaster is available at (503)-

945-7401. Please call this number and not individual's

numbers to discuss daily burning. For large burns (over

2000 tons) or burns extending over a considerable period,

please request a special forecast. Avoid calling

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

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

Daily/neo.htm

To subscribe to or unsubscribe from the email list for this

product, please go to the link:

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

Please ensure your units have been planned and accomplished by

checking: http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml

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

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

?id=a7e321dc8fc444b7a33fbc67bc673a3b

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.

* 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.