SMOKE MANAGEMENT
FORECAST AND INSTRUCTIONS
SALEM FORESTRY
WEATHER CENTER
OREGON DEPARTMENT
OF FORESTRY
ISSUED: Tuesday,
May 21, 2013
2:35 PM
Nick Yonker
1. DISCUSSION AND FORECAST FOR NORTHEAST
FORECAST AREA ZONES 630-638
Upper level low continues to move into the
state today bringing very chilly temperatures for this time of year. The upper low will then park itself over
the state tomorrow. Expect
scattered showers through this evening and then more on Wednesday, especially
during the afternoon. Snow level
will range from 2500 to 4500 ft.
Air mass will be very unstable with the potential of thundershowers and
small hail in some places. Smoke
dispersion will be excellent.
EXTENDED
DISCUSSION
Upper low will remain over the region through
the remainder of the week and into the weekend. It will slowly weaken however. Expect gradual warming through the
period but continued showers, mostly during the afternoon hours. Showers taper off toward the
weekend. Air mass will remain
unstable except for some minor stability during the morning. Smoke dispersion
will remain excellent. Wind flow
will weaken through the period and become somewhat variable.
2. DISPERSION
WEDNESDAY
Zone 630 and
632:
Mixing height above 5000 ft throughout the
day.
Transport wind SSW to SW at 20 - 35 mph
during the morning. Transport wind
decreases to SW to WSW at 15 - 30 mph during the afternoon then shifts to WNW to
NW and decreases to 8 - 12 mph during the evening.
Surface wind SSW to SW at 10 - 18 mph
throughout the morning and afternoon.
Surface wind shifts to WNW to NNW and decreases to 5 - 9 mph during the
evening.
Zone 633 -
638:
Mixing height above 5000 ft throughout the
day.
Transport wind S to SSW at 12 - 24 mph
throughout the morning and afternoon.
Transport wind shifts to WNW to NNW and decreases to 6 - 10 mph during
the evening.
Surface wind SSE to SSW at 8 - 12 mph during
the morning. Surface wind shifts to SSW to WSW at 8 -
14 mph during the afternoon and shifts to NW to N at 6 - 10 mph during the
evening.
OUTLOOK:
THURSDAY
Mixing height 3200 to 4200 ft during the
morning rising above 5000 ft during the afternoon.
Transport wind light and variable during the morning becoming WNW to NNW
at 6 - 10 mph during the afternoon.
Surface wind light and variable during the morning
becoming NW to N at 4 - 8 mph during the afternoon.
FRIDAY
Mixing height 3200 to 4200 ft during the
morning rising above 5000 ft during the afternoon.
Transport wind SSW to WSW at 8 - 12 mph. Surface wind SSW to
WSW at 8 - 12 mph.
SATURDAY
Mixing height below 1000 ft early rising to
3500 to 4500 ft by late morning rising above 5000 ft during the
afternoon. Transport wind S to SW at 4 - 8
mph. Surface wind
light and variable during the morning becoming SSW to WSW at 4 - 8 mph during
the afternoon.
3. BURNING INSTRUCTIONS FOR NORTHEAST
OREGON ZONES 630-638
The following considerations
should be adhered to in addition to
the
requirements of the Oregon Smoke Management Plan. These
Instructions are valid for
burning conducted on Wednesday, May 22, 2013.
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Zone 630 and
632:
Avoid ignitions within 10 miles to the SSW
through NW of SSRAs. For units that
will smolder significantly through the night avoid burning within at least 10
miles in all directions of SSRAs.
Watch for shifting transport winds.
No additional restrictions necessary.
Zone 633 -
638:
Avoid ignitions within 10 miles in all
directions of SSRAs. Watch for
shifting transport winds. 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
before
8 a.m. and
between 2 to 3 p.m.
This forecast is available
on the Internet at:
http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management_Information
Please ensure your units
have been planned and accomplished by checking:
http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml