SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

 

ISSUED: Friday, January 27, 2023 2:30 PM Sherri Pugh

 

*********************************************************************

* Special Protection Zone (SPZ) provisions apply from November 15 through February 15. Prescribed burning is not allowed on Red woodstove days in an SPZ from December 1 through February 15. Burning is allowed inside of SPZs on green and yellow woodstove days, but please use extra precautions and limit forestland burning to units that will not worsen air quality within nearby SSRAs. *

*********************************************************************

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

 

SHORT-TERM DISCUSSION

 

A cold upper-level trough moves into the region Saturday with increasing showers. Totals will be light with less than 0.10 rainfall and a few inches of high elevation snow. Mixing heights increase as snow levels drop near 4000 feet. Light winds will be variable at the surface and W-NW for transport winds. Temperatures fall below average.

 

Showers linger for the morning with decrease clouds and cold temperatures on Sunday. Flow aloft comes from NE as the upper-level trough shifts out of the region. Winds increase from NNE with temperatures as cold as 10 below seasonable. Snow levels dip under 3000 feet and mixing heights will be good.

 

EXTENDED DISCUSSION

 

Mostly sunny skies and below average temperatures are expected Monday. Light winds aloft come from N with upper-level ridging. Winds become light from E-ESE. Mixing heights decrease with snow levels rising to 3-4000 feet.

 

More clouds arrive Tuesday with partly to mostly cloudy skies. Upper-level flow comes from NW with just below average temperatures. Mixing heights will be fair. Light winds will be SSW at the surface and SW for transport winds.

 

2. DISPERSION

 

SATURDAY

 

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

 

Transport wind WNW to NNW at 4 - 8 mph during the morning. Transport wind shifts to WSW to WNW at 4 - 8 mph during the afternoon and shifts to NW to N 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 1500 - 2500 ft by late morning and through the afternoon. Transport wind NNE to NE at 12 - 22 mph during the morning becoming NNE to NE at 15 - 29 mph during the afternoon. Surface wind N to NE at 9 - 15 mph.

 

MONDAY

Mixing height below 300 ft during the morning rising to 1500 - 2500 ft during the afternoon lowering below 1000 ft during the evening. Transport wind ENE to ESE at 4 - 8 mph during the morning and afternoon. Transport wind becomes light and variable and controlled by local terrain during the evening. Surface wind light and variable and controlled by local terrain.

 

TUESDAY

Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning and through the afternoon. Transport wind SSW to WSW 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, Sunday, and Monday January 28 - 30, 2023.

==================================================================

 

For Saturday:

 

Follow standard guidance matrix - see section 5 below - for burning units to the WSW through N of SSRAs. For units that will smolder significantly through the night avoid burning within at least 25 miles in all directions of SSRAs. Verify transport winds away from SSRAs if burning in any other direction. Watch for shifting transport winds. Complete ignitions by 3 p.m. No additional restrictions necessary.

 

For Sunday:

 

Follow standard guidance matrix - see section 5 below - for burning units to the N through NE of SSRAs. For units that will smolder significantly through the night avoid burning within at least 30 miles to the N through ENE in or near drainages leading to SSRAs. Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas. Complete ignitions by 3 p.m. No additional restrictions necessary.

 

For Monday:

 

Delay ignitions until 11 a.m. 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 30 miles in all directions of SSRAs. Complete ignitions by 3 p.m. No additional restrictions necessary.

 

==============================================================

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.