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: Thursday, October 29, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will remain over the region tonight and Friday before flattening and giving way to a cold front late Friday and early Saturday.  Currently the warm front is arcing over the ridge and spreading clouds and light rain or snow over the region today.  This will diminish tomorrow as the warm frontal zone moves off to the east.  Air mass mixes out with the warm air aloft mixing down to the surface and improving mixing conditions.  Light winds will keep smoke dispersion mostly fair.

    OUTLOOK (SATURDAY - MONDAY):

Cold front moves into the region on Saturday, gradually breaking apart as it moves through.  Moisture amounts will be generally light.  Upper ridge will then rebuild Sunday, stabilizing the air mass later in the day.  Ridge remains overhead but moving eastward on Monday.  Smoke dispersion will gradually worsen through the period.

2.  DISPERSION

FRIDAY
Mixing height 2500 - 3500 ft during the morning.  Afternoon mixing height rises to 3200 - 4200 ft then lowers to 1300 - 2300 ft during the evening.

Transport wind SW to W at 8 - 12 mph.

Surface wind SSW to W at 6 - 10 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

SATURDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to WSW at 14 - 28 mph during the morning becoming WSW to WNW at 10 - 18 mph during the afternoon.  Surface wind SSW to WSW at 10 - 16 mph during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.

SUNDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning and through the afternoon.  Transport wind SSE to SSW at 5 - 9 mph during the morning becoming SW to W at 6 - 10 mph 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 Friday, October 30, 2009.
    ==================================================================

Avoid ignitions within 15 miles to the SW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SSW through WNW 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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