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: Wednesday, December 16, 2009       2:35 PM      Nick Yonker

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

Moist and mild SW'erly jet stream will continue to bring frontal systems into the region.  A warm front will move in tomorrow but moisture will be quite limited.  A cold front will approach late Thursday.  Mild air mass aloft will keep mixing heights rather low.  Smoke dispersion will be mostly fair.

    OUTLOOK (FRIDAY - SUNDAY):

Cold front will move through on Friday but lift mixing heights only a little.  Next warm front arrives on Saturday then will be followed by a cold front on Sunday.  Air mass will remain somewhat stable through the period under mild air aloft.  Smoke dispersion will be generally fair through the period, varying as fronts move through.

2.  DISPERSION

THURSDAY

Mixing height 1500 - 2500 ft through the morning and afternoon, lowering to 1000 - 2000 ft during the evening.

Transport wind S to SW at 7 - 13 mph during the morning and afternoon.  Transport wind increases to S to SSW at 10 - 18 mph during the evening.

Surface wind SSE to SW at 5 - 9 mph.


OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 1700 to 2700 ft during the afternoon.  Transport wind S to SW at 6 - 10 mph.  Surface wind SE to SSW at 5 - 7 mph.

SATURDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2000 to 3000 ft during the afternoon.  Transport wind SE to SSW at 5 - 9 mph.  Surface wind light and variable during the morning becoming SE to S at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph.  Surface wind SE to SSW at 6 - 10 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 Thursday, December 17, 2009.
    ==================================================================

Avoid ignitions within 15 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the SSE through WSW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.

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