SMOKE MANAGEMENT
FORECAST AND INSTRUCTIONS
SALEM FORESTRY
WEATHER CENTER
OREGON DEPARTMENT
OF FORESTRY
ISSUED: Friday,
May 26, 2023
2:30 PM Sherri Pugh
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Holiday Schedule **************************
The ODF forecast office will be closed over Memorial
Weekend (May 27th – 29th). Today’s forecast
includes burning instructions for Saturday, May 27th through Tuesday, May 30th
(4 days).
A forecaster is available at 503-945-7401 until
5 p.m. today (Friday), to handle questions regarding weekend burning. The office will reopen at 7 a.m. on Tuesday,
May 30th.
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1. DISCUSSION AND FORECAST FOR THE WESTERN
OREGON AREA FORECAST ZONES 601-623 and 639
A
weak upper-level low will replace the brief ridging
and bring mostly to partly cloudy skies on Saturday. Some storms could develop along and east of the
Cascades. Temperatures drop to near
average and mixing heights will be fair to good. Winds come from NW-NNW.
The upper-level
low drops south into California on Sunday with weak ridging offshore. Skies turn mostly sunny with a very isolated
risk of Cascades storms. Surface winds
come from NW-N. Transport winds will be
NNW-NNE and more variable east of the Cascades.
Mixing heights stay fair to good and temperatures reach near or above seasonable.
EXTENDED
DISCUSSION
On Monday, the upper-level low will be far south and a shortwave of upper-level
ridging will promote clear skies. Temperatures
rise above average and mixing heights continue fair to good. Surface winds will be NW-N and transport
winds will be WNW-N.
Flow aloft comes from W on Tuesday with sunny skies. Winds come from WNW-N with above average
temperatures. Mixing heights will be
good.
2. DISPERSION
SATURDAY
Zone 601, 602,
603, 612 and 615-620 (North and South Coast Range):
MORNING
Mixing height
below 800 ft early rising to 1000 - 2000 ft by late morning.
Transport wind
light and variable and controlled by local terrain.
Surface wind
light and variable and controlled by local terrain.
AFTERNOON
Mixing height
1500 - 2500 ft.
Transport wind
increases to NW to N at 6 - 10 mph.
Surface wind
increases to WNW to NNW at 4 - 8 mph.
EVENING
Mixing height
1000 - 1500 ft.
Transport wind similar to afternoon.
Surface wind NW
to N at 6 - 10 mph.
Zone 605-611, 639
and 616-623 (North and South Cascades):
MORNING
Mixing height
below 500 ft early rising to 2500 - 3500 ft by late morning.
Transport wind
WNW to NNW at 6 - 10 mph.
Surface wind WNW
to NNW at 4 - 8 mph.
AFTERNOON
Mixing height
rising above 5000 ft.
Transport wind similar to morning.
Surface wind similar to morning.
EVENING
Mixing height 1000 - 2000 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.
OUTLOOK:
SUNDAY
Mixing height
below 1000 ft early rising to 1800 to 2800 ft by late morning rising to 2600 to
3600 ft during the afternoon. Transport
wind NNW to NNE at 4 - 8 mph. Surface
wind light and variable during the morning becoming NW to N 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 3100 to
4100 ft during the afternoon. Transport
wind NW to N at 4 - 8 mph. Surface wind
light and variable during the morning becoming NW to N at 6 - 10 mph during the
afternoon.
TUESDAY
Mixing height
below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3100 to
4100 ft during the afternoon. Transport
wind NW to NNE at 4 - 8 mph. Surface
wind NW to N at 4 - 8 mph.
3. BURNING INSTRUCTIONS FOR ALL ZONES IN THE
WESTERN OREGON AREA
- Valid for burning done Saturday, Sunday,
Monday, and Tuesday, May 27 - 30, 2023.
=================================================================
For Saturday:
Coast Range
***Avoid
ignitions before 10 a.m. in all zones.
Complete ignitions by 5 p.m. in all zones.***
Zone 601, 612,
and 616 east of R9W
Units should be
600 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Higher tonnage is possible south of Waldport
in Zone 612. Call the forecaster. Restrict units to 500 tons or less south of
T30S in Zone 616.
Zone 602 and 603
No burning
allowed. Some burning is possible south
of T17S 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
900 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs.
Zone 620
Units should be
300 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Some burning allowed south of the Rogue
River. Call the forecaster.
Cascades
***Avoid
ignitions before 10 a.m. in all zones.***
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 3 miles apart.
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.
For Sunday:
Coast Range
***Avoid
ignitions before 10 a.m. in all zones.
Complete ignitions by 5 p.m. in all zones.***
Zone 601 and 612
Units should be
600 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Higher tonnage is possible south of Waldport
in Zone 612. Call the forecaster.
Zone 602 and 603
No burning
allowed. Some burning is possible south
of T17S in Zone 603. Call the
forecaster.
Zone 615, 616,
618, 619, and 620
Use standard
guidance matrix. (See section 5 below.)
Avoid burning directly upwind of the North Bend/Coos Bay SSRA.
Cascades
Zone 605 and 606
Units should be
1000 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs.
Zone 607, 608,
639, 610, and 611
Use standard
guidance matrix - see section 5 below.
Ensure adequate distance from downwind SSRAs for smoke to dissipate.
Zone 616 and 617
Units should be
1000 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 6 miles apart, and 8 miles from downwind SSRAs.
Zone 623
Units should be
1200 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs.
Siskiyous
Use standard
guidance matrix - see section 5 below.
For Monday:
Coast Range
***Avoid
ignitions before 12 p.m. in all zones.
Complete ignitions by 5 p.m. in all zones.***
Zone 601, 612,
and 616 east of R9W
Units should be
600 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Higher tonnage is possible south of Waldport
in Zone 612. Call the forecaster. Restrict units to 500 tons or less south of
T30S in Zone 616.
Zone 602 and 603
No burning
allowed. Some burning is possible south
of T17S 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
900 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs.
Zone 620
Units should be
300 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Some burning allowed south of the Rogue
River. Call the forecaster.
Cascades
***Avoid
ignitions before 10 a.m. in all zones.***
Zone 605, 606,
607, 608, 639, 617, 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 3 miles apart.
Zone 610
Units should be
1200 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs.
Zone 611
Units should be
1500 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs.
Zone 616
Units should be
1000 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 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 Tuesday:
Coast Range
***Avoid
ignitions before 10 a.m. in all zones.***
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 T17S 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
900 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs.
Zone 616 east of
R9W
Units should be
600 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Restrict units to 500 tons or less south of
T30S.
Zone 620
Units should be
300 tons or less, spaced 12 miles apart, and 12 miles from downwind SSRAs. Some burning allowed south of the Rogue
River. Call the forecaster.
Cascades
Zone 605, 606,
607, 608, 639, 611, 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 3 miles apart. South of T30S in Zone 617 units should be
1000 tons or less, spaced 6 miles apart.
Zone 610
Units should be
1200 tons or less, spaced 3 miles apart, and 5 miles from downwind SSRAs.
Zone 616
Units should be
1000 tons or less, spaced 6 miles apart, and 8 miles from downwind SSRAs. South of T30S units should be 1000 tons or
less, spaced 6 miles apart.
Zone 620 and 622
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.
==============================================================
4. SPECIAL NOTE:
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.