SMOKE MANAGEMENT
FORECAST AND INSTRUCTIONS
SALEM FORESTRY
WEATHER CENTER
OREGON DEPARTMENT
OF FORESTRY
ISSUED: Tuesday,
May 17, 2022
2:30 PM Gary Votaw
1. DISCUSSION AND FORECAST FOR SOUTH CENTRAL
OREGON ZONES 624 AND 625
SHORT-TERM
DISCUSSION
Breezy
west winds will dominate Wednesday under partly sunny skies as a trough moves
into Washington. Mixing heights will rise
through the day, with W transport winds in the morning becoming stronger by
afternoon.
EXTENDED
DISCUSSION
The
trough will pass into Idaho on Thursday and leave the area cooler but dry under
NW flow aloft. Daytime temperatures will
be around 10oF below seasonal.
Daytime mixing heights will be good with W to NW transport winds.
Cold NW flow aloft will be over the area for Friday
and Saturday. High pressure at the
surface will ensure mostly sunny and near seasonal temperatures. Mixing heights will rise through the day but
winds will generally be very light, NE to E transport winds on Friday turning NW
to N by Saturday afternoon.
2. DISPERSION
WEDNESDAY
Mixing height
3500 - 4500 ft during the morning.
Mixing height rises to above 5000 ft during the afternoon then lowers to
3300 - 4300 ft during the evening.
Transport wind
WSW to WNW at 10 - 18 mph during the morning.
Transport wind increases to WSW to WNW at 22 - 38 mph during the
afternoon then decreases to WSW to W at 18 - 30 mph during the evening.
Surface wind SW
to W at 9 - 15 mph during the morning.
Surface wind increases to W to WNW at 15 - 29 mph during the afternoon
then decreases to W to NW at 12 - 22 mph during the evening.
OUTLOOK:
THURSDAY
Mixing height
2600 - 3600 ft during the morning rising above 5000 ft during the
afternoon. Transport wind W to NW at 9 -
15 mph during the morning becoming NW to NNW at 13 - 25 mph during the
afternoon. Surface wind W to NW at 8 -
12 mph during the morning becoming NW to NNW at 16 - 30 mph during the
afternoon.
FRIDAY
Mixing height
3500 - 4500 ft during the morning rising above 5000 ft during the
afternoon. Transport wind ENE to E at 10 - 20 mph during the morning becoming NE to E at 4 - 8 mph during the afternoon. Surface wind N to NE at 5 - 9 mph during the
morning becoming light and variable during the afternoon.
SATURDAY
Mixing height
below 1000 ft early rising to 4500 - 5000 ft by late morning rising above 5000
ft during the afternoon. Transport wind
light and variable during the morning becoming NW to N at 6 - 12 mph during the
afternoon. Surface wind N to NE at 5 - 9
mph.
3. BURNING INSTRUCTIONS FOR ZONES 624 AND 625
INCLUDING THE WALKER
RANGE PORTION OF ZONE 624
- Valid for burning done Wednesday, May 18,
2022.
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Follow standard
guidance matrix - see section 5 below - for burning units to the WSW through
WNW of SSRAs. For units that will
smolder significantly through the night avoid burning within at least 10 miles
to the WSW through WNW in or near drainages leading to SSRAs. Care needed in selecting units as smoke will
likely fumigate along the ground in wind prone areas. 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.