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, April 30, 2009       2:35 PM      Nick Yonker

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

Upper level trough is exiting eastward and giving way to a temporary ridge for tonight and Friday.  However, the next upper low and front will move up from the southwest later Friday bringing an increased chance of moisture Friday night.  Air mass will stabilize during the morning under the ridge but afternoon heating will provide good mixing.  Wind flow will turn offshore and provide decent smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Upper level low moves in Saturday and weakens but will still produce some scattered showers over the region.  Showers decrease on Sunday, and then another trough and front move in later Monday.  This promises to be a stronger system, bringing fairly breezy conditions as well.  Air mass will be mostly unstable during the afternoon and somewhat stable during the morning.  Expect decent smoke dispersion.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers below 1000 ft during the evening.

Transport wind ESE to SSE at 9 - 15 mph.

Surface wind E to SE at 5 - 9 mph.

OUTLOOK:

SATURDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind S to SW at 7 - 13 mph during the morning becoming SSW to WSW at 10 - 20 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 8 - 12 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind WSW to WNW at 10 - 20 mph.  Surface wind SW to WSW at 9 - 15 mph.

MONDAY
Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 10 - 20 mph during the morning becoming SSE to SSW at 15 - 30 mph during the afternoon.  Surface wind SSE to SSW at 8 - 12 mph.

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, May 1, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the E through SSE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the E through SSW 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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