SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, August 1, 2025 2:30 PM Sherri Pugh

1. DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625

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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 3000 - 4000 ft by late morning. Afternoon mixing height rises above 5000 ft then lowers to 1500 - 2500 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning. Transport wind increases to SSW to WSW at 4 - 8 mph during the afternoon then shifts and increases to WNW to NNW at 8 - 12 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning. Surface wind increases to SW to W at 4 - 8 mph during the afternoon then shifts to WNW to NNW at 6 - 10 mph during the evening.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning rising above 5000 ft during the afternoon. Transport wind SSW to W at 4 - 8 mph. Surface wind light and variable during the morning becoming SW to W at 4 - 8 mph during the afternoon.

MONDAY

Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning rising above 5000 ft during the afternoon. Transport wind SSW to WSW at 4 - 8 mph during the morning becoming WSW to WNW at 6 - 10 mph during the afternoon. Surface wind WSW to WNW at 4 - 8 mph.

TUESDAY

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning rising above 5000 ft during the afternoon. Transport wind S to SW at 4 - 8 mph. Surface wind light and variable.

3. BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER

RANGE PORTION OF ZONE 624

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

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For Saturday:

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 25 miles to the SSW through NNW in or near drainages leading to SSRAs. Verify transport winds away from SSRAs if burning in any other direction. No additional restrictions necessary.

For Sunday:

Follow standard guidance matrix - see section 5 below - for burning units to the S through NNW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 25 miles to the S through NNW in or near drainages leading to SSRAs. Verify transport winds away from SSRAs if burning in any other direction. Watch for shifting transport winds. No additional restrictions necessary.

For Monday:

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. Verify transport winds away from SSRAs if burning in any other direction. No additional restrictions necessary.

For Tuesday:

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4. SPECIAL NOTE:

The smoke management forecaster is available at (503)

945-7401. The smoke management forecaster is available

to discuss specific burns. The duty forecaster phone

number is (503) 945-7401. Please call this number and

not individual's numbers to discuss daily burning. Please

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

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

Daily/lmt.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.