SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, April 3, 2009       2:35 PM      Nick Yonker

1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638

Upper level ridge will build into the region tomorrow bringing a mostly sunny day.  Temperatures will remain chilly with a hard freeze Saturday morning.  Air mass will stabilize and wind flow turns lightly offshore.  Expect poor to fair smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Upper ridge drifts to the east Sunday and Monday with an upper low undercutting it as it moves into California.  Overall, expect a dry and mild period with mostly sunny skies.  Air mass will be stable during the night and morning hours with a brief period of instability during the afternoon over inland locations.  Offshore flow will continue through Monday before breaking down and turning light and variable Tuesday afternoon.  Smoke dispersion will remain mostly poor to fair.

2.  DISPERSION

SATURDAY

Mixing height below 1000 ft early rising to 3700 - 4700 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind ESE to SE at 8 - 14 mph.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to E to SE at 6 - 10 mph during the afternoon then becomes light and variable during the evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to S at 10 - 18 mph.  Surface wind light and variable during the morning becoming ESE to S at 6 - 10 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind E to SE at 10 - 16 mph.  Surface wind E to SE at 5 - 9 mph during the morning becoming light and variable during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind ESE to SSE at 6 - 10 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

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 Saturday and Sunday, April 4 and 5, 2009.
    ==================================================================

For Saturday:

Avoid ignitions within 12 miles to the E through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the E through S in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.

For Sunday:

Avoid ignitions within 15 miles to the ESE through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the ESE through S in or near drainages leading to SSRAs.

    =========================================================
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

    Please ensure your units have been planned and accomplished by checking:
      http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml


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