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: Monday, September 20, 2010       2:35 PM      Jim Little

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

    TUESDAY

Upper level flow will be generally west-southwest ahead of a weak trough about 400 miles west of the southern Oregon Coast.  That trough will approach during the day, but it is weak and mainly headed toward California, so its primary effect will be a few mid and high clouds over the region.  No rain is likely.

    OUTLOOK (WEDNESDAY-FRIDAY)

The trough moves into California on Wednesday leaving a weak ridge over the western Oregon.  Northeast Oregon will see dry weather.  By Thursday a weakening front drags across northwestern Oregon for some light rain but no moisture is likely to make it east side.  By Friday a deep upper low is about 600 miles west of Vancouver Island.  This helps to build a ridge over the region for dry weather and warmer temperatures.


2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 1900 - 2900 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2700 - 3700 ft during the evening.

Transport wind NNE to ENE at 5 - 9 mph during the morning.  Transport wind increases to NNE to NE at 8 - 14 mph during the afternoon and increases to NNE to ENE at 12 - 22 mph during the evening.

Surface wind NNE to ENE at 5 - 9 mph throughout the day.

Zone 633 - 638:
Mixing height 3100 - 4100 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1100 - 2100 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNE to NE at 8 - 14 mph during the afternoon and evening.

Surface wind N to NE at 4 - 8 mph during the morning.  Surface wind increases to N to NE at 8 - 12 mph during the afternoon and evening.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNW to NE at 6 - 10 mph.  Surface wind light and variable during the morning becoming NW to NNE at 6 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 3200 to 4200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height below 1000 ft early rising to 2600 to 3600 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable during the morning becoming SE to SSW at 6 - 10 mph during the afternoon.

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 Tuesday, September 21, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the N through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the N through ENE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.

Zone 633 - 638:
Avoid ignitions within 15 miles to the NNW through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the NNW through ENE in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.

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