SMOKE
MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY
WEATHER CENTER
OREGON
DEPARTMENT OF FORESTRY
ISSUED:
Thursday, December 2, 2021
2:40 PM
Gary Votaw
**************** Air
Stagnation Advisory Information ****************
An
Air Stagnation Advisory may be in effect for your area (consult the link below
for the latest information). Please use extra precautions and limit forestland
burning to units that will not worsen air quality within nearby
SSRAs.
*
Current Air Stagnation Advisories: https://www.weather.gov/wrh/. *
*********************************************************************
1.
DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND
625
SHORT-TERM
DISCUSSION
Transport
winds will be light early Friday then become SW in the afternoon while mixing
heights will again be moderate. Except for
areas of morning fog, conditions will be sunny and continued very warm,
15-20oF above seasonal levels.
EXTENDED
DISCUSSION
An
upper-level trough and cold front will quickly brush by the north side of the
region on Saturday.
Conditions will still be mostly sunny and warm, with good mixing
heights and SW transport winds trending to W in the
afteroon.
Sunday
will be mostly sunny and cooler.
Burning conditions will be limited with fair mixing heights and
very light winds, mainly NE to SE.
A
stronger system is expected on Monday.
Rain and snow are likely, snow level mainly around 4000 feet. Expected
moisture will be around .10” but up to .25” for higher elevations. Mixing heights will become
excellent in the afternoon with SW to W transport winds.
2.
DISPERSION
FRIDAY
Mixing height
below 1000 ft during the morning.
Afternoon mixing height rises to 1900 - 2900 ft then lowers below
1000 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 6 - 10 mph during the afternoon and
evening.
Surface wind
light and variable and controlled by local terrain.
OUTLOOK:
SATURDAY
Mixing height
below 1000 ft early rising to 1500 - 2500 ft by late morning rising to 2900 -
3900 ft during the afternoon.
Transport wind SSW to WSW at 10 - 22 mph during the morning
becoming WSW to W at 22 - 38 mph during the afternoon. Surface wind SSW to WSW at 8 -
12 mph during the morning becoming WSW to W at 12 - 22 mph during the
afternoon.
SUNDAY
Mixing height
1500 - 2500 ft during the morning and through the afternoon. Transport
wind light and variable. Surface wind light and
variable.
MONDAY
Mixing height
below 1000 ft early rising to 1500 - 2500 ft by late morning rising to 4500 -
5000 ft during the afternoon.
Transport wind SW to WSW at 22 - 40 mph during the morning
becoming W to WNW at 25 - 45 mph during the afternoon. Surface wind SW to WSW at 12 -
24 mph during the morning becoming WSW to WNW at 15 - 25 mph during the
afternoon.
3.
BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE
WALKER
RANGE PORTION OF ZONE
624
- Valid for burning done
Friday, December 3, 2021.
==================================================================
Delay
ignitions until 10 a.m. Follow standard guidance matrix
- see section 5 below - for burning units to the SE through W of SSRAs. For units
that will smolder significantly through the night avoid burning within at least
30 miles to the SE through W in or near drainages leading to SSRAs. Complete ignitions by 2 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.