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, November 9, 2009       2:35 PM      Jim Little

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

A trough in the Gulf of Alaska will move closer to the Pacific Northwest giving southwesterly flow aloft over the region.  The atmosphere should be fairly unstable and mixing heights will be 5000 feet or above for fair to good smoke dispersal conditions.  Skies will be mainly partly cloudy with just a chance of a shower.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper level trough moves west to east across the Pacific Northwest during the day.  Subsidence behind the trough starts to stabilize the atmosphere.  Mixing heights will fall and smoke dispersal conditions become less favorable.  By Thursday temporary ridging aloft suppresses mixing heights and smoke dispersal conditions further deteriorate. Mixing heights will be near 3000 feet most areas.  A strong upper trough approaches Friday and cooler air aloft with this system helps destabilize the atmosphere and improve burning prospects.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 3100 - 4100 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1000 - 2000 ft during the evening.

Transport wind SSW to SW at 10 - 16 mph throughout the morning and afternoon.  Transport wind shifts to WNW to NNW at 6 - 12 mph during the evening.

Surface wind SSW to SW at 8 - 14 mph during the morning.  Surface wind decreases to SW to W at 5 - 9 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Zone 633 - 638:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 1000 - 2000 ft during the evening.

Transport wind SSW to WSW at 8 - 12 mph throughout the day.

Surface wind SSW to WSW at 6 - 12 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 3300 to 4300 ft by late morning and through the afternoon.  Transport wind SSW to WSW at 8 - 12 mph during the morning becoming WSW to WNW at 10 - 16 mph during the afternoon.  Surface wind SSW to WSW at 5 - 9 mph during the morning becoming WSW to NW at 6 - 10 mph during the afternoon.

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

FRIDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind S to SW at 4 - 8 mph during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 4 - 8 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, November 10, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles to the S through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the S through NNW in or near drainages leading to SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

Zone 633 - 638:
Avoid ignitions within 12 miles to the SSW through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through W in or near drainages leading to SSRAs.  Complete ignitions by 3:00pm.

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