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: Sunday, November 8, 2009       2:35 PM      Jim Little

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

Surface high pressure centered over southwest Montana will keep northeast Oregon dry early on Monday.  But a Pacific cold front crossing the cascades should bring rain to the area late afternoon and overnight.  Mixing heights will be suppressed somewhat ahead of the front for marginal to fair smoke dispersal conditions.

   OUTLOOK (TUESDAY-THURSDAY)

An upper level trough in the Gulf of Alaska will dominate weather through the outlook period.  The trough will move slowly eastward and be exiting the region by Friday.  Several weather systems will rotate around that upper system and affect the area.  This will keep showers or light rain going throughout the outlook period   Mixing heights should remain high during the afternoons for favorable smoke dispersal conditions.

2.  DISPERSION

MONDAY

Zone 630 and 632:
Mixing height 2500 - 3500 ft throughout the day.

Transport wind S to SSW at 14 - 28 mph during the morning and afternoon.  Transport wind increases to SSW to WSW at 18 - 32 mph during the evening.

Surface wind S to SSW at 10 - 18 mph throughout the day.

Zone 633 - 638:
Mixing height 2500 - 3500 ft throughout the day.

Transport wind SSE to S at 15 - 25 mph throughout the day.

Surface wind SE to S at 10 - 20 mph during the morning.  Surface wind decreases to SE to S at 8 - 14 mph during the afternoon and evening.

OUTLOOK:

TUESDAY
In the west mixing height 2100 to 3100 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 1400 to 2400 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 8 - 14 mph during the morning becoming light and variable during the afternoon.  Surface wind S to SW at 5 - 9 mph during the morning becoming light and variable during the afternoon.

WEDNESDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

THURSDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  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 Monday, November 9, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the S through WSW of SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
Avoid ignitions within 12 miles to the SE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SE through SW 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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