SMOKE MANAGEMENT
FORECAST AND INSTRUCTIONS
SALEM FORESTRY
WEATHER CENTER
OREGON DEPARTMENT
OF FORESTRY
ISSUED: Monday,
December 5, 2022
2:30 PM Sherri Pugh
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* 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. *
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1. DISCUSSION AND FORECAST FOR NORTHEAST
FORECAST AREA ZONES 637-646
SHORT-TERM DISCUSSION
Winds aloft turn weakly from the NW with dry weather and
partly cloudy to mostly cloudy skies on Tuesday. Mixing heights will be fair with snow levels
at 3-4000 feet. Surface winds come from
S-SW and transport winds come from SSW-WSW.
Temperatures will be a few degrees below average.
EXTENDED DISCUSSION
Skies turn mostly sunny on Wednesday with a short-wave ridge
and weak NW to W flow aloft. Light
surface winds will be from the S with SSW-SW transport winds. Mixing heights and snow levels stay similar to Tuesday.
Temperatures remain below average.
A new system increases the potential for mountain snow and a
rain/snow mix on Thursday. A short-wave
upper-level trough will bring increased SW winds aloft and less than 0.25” rainfall. Surface winds come from S in central Oregon
and SSE in northeastern Oregon.
Transport winds increase from SSW.
Snow levels drop to near 3000 feet with fair mixing heights.
Skies stay mostly cloudy on Friday with W flow aloft and
more potential for precipitation. Winds
turn from SSE-S. Mixing heights improve
some with snow levels under 3000 feet.
2. DISPERSION
TUESDAY
Zone 640, 642,
and 644 West of R35E:
Mixing height
below 500 ft early rising to 1000 - 2000 ft by late morning. Afternoon mixing height rises to 2300 - 3300
ft then lowers below 1000 ft during the evening.
Transport wind SW
to W at 6 - 10 mph during the morning.
Transport wind increases to SW to W at 10 - 18 mph during the afternoon
and evening.
Surface wind
light and variable and controlled by local terrain during the morning. Surface wind increases to SSW to WSW at 4 - 8
mph during the afternoon and evening.
Zone 637, 643,
645, 646, and 644 East of R34E:
Mixing height
below 800 ft during the morning rising to 1000 - 2000 ft during the afternoon
lowering below 1000 ft during the evening.
Transport wind S
to SW 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.
OUTLOOK:
WEDNESDAY
Mixing height
below 1000 ft early rising to 1500 to 2500 ft by late morning and through the
afternoon. Transport wind SSW to WSW at
4 - 8 mph. Surface wind light and
variable.
THURSDAY
Mixing height
1000 to 2000 ft during the morning rising to 2000 to 3000 ft during the
afternoon. Transport wind SE to S at 8 -
12 mph during the morning becoming S to SW at 10 - 18 mph during the
afternoon. Surface wind ESE to S at 4 -
8 mph.
FRIDAY
Mixing height
below 1000 ft early rising to 1500 to 2500 ft by late morning and through the
afternoon. Transport wind SSE to SSW at
6 - 10 mph. Surface wind light and
variable.
3. BURNING INSTRUCTIONS FOR NORTHEAST OREGON
ZONES 637-646
- Valid for burning done Tuesday, December
6, 2022.
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Zone 640, 642,
and 644 West of R35E:
Delay
ignitions until 10 a.m. Follow standard guidance matrix - see section
5 below - for burning units to the SW through W of SSRAs. For units that will smolder significantly
through the night avoid burning within at least 30 miles to the SSW through W
in or near drainages leading to SSRAs. Complete
ignitions by 3 p.m. No additional
restrictions necessary.
Zone 637, 643,
645, 646, and 644 East of R34E:
Delay
ignitions until 10 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.
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4. SPECIAL NOTE:
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.