SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Mon Dec 14 16:17:25 PST 2009


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, December 14, 2009       2:35 PM      Jim Little

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

The Pacific Northwest will be under a strong southwesterly flow aloft on Tuesday.  Forecast upper wind charts indicate a southwesterly jet stream with winds of about 125mph at approximately 30,000 feet.  The remains of a Pacific cold front will keep it cloudy and wet much of the day.  Snow levels should be around 4000 feet.  Mixing heights will be held to around 2500 feet but transport winds should be fairly brisk from the south-southeast.

    OUTLOOK (WEDNESDAY-FRIDAY)

Showers continue Wednesday but mixing heights will only be marginal.  Offsetting that will be brisk southerly transport winds. A Pacific cold front moves in late Thursday but warm air ahead of that system will hold mixing heights down. The wet southwesterly flow continues for Friday.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 1500 - 2500 ft during the morning.  Afternoon and evening mixing rises to 2500 - 3500 ft.

Transport wind SSW to SW at 20 - 36 mph during the morning.  Transport wind increases to S to SSW at 24 - 42 mph during the afternoon and evening.

Surface wind SSW to SW at 12 - 22 mph throughout the day.

Zone 633 - 638:
Mixing height 1500 - 2500 ft during the morning.  Afternoon and evening mixing rises to 2500 - 3500 ft.

Transport wind S to SSW at 12 - 24 mph during the morning and afternoon.  Transport wind increases to S to SSW at 18 - 32 mph during the evening.

Surface wind SSE to SSW at 9 - 15 mph.

OUTLOOK:

WEDNESDAY
Mixing height 1700 to 2700 ft throughout the day.  In the west transport wind SSW to SW at 18 - 32 mph during the morning becoming SSE to SSW at 13 - 25 mph during the afternoon.  In the east transport wind SSW to SW at 10 - 20 mph during the morning becoming S to SW at 8 - 12 mph during the afternoon.  Surface wind S to SW at 9 - 15 mph during the morning becoming SW to WNW at 6 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height 1200 to 2200 ft during the morning rising to 2500 to 3500 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 Tuesday, December 15, 2009.
    ==================================================================

Zone 630 and 632:
Delay ignitions until 11:00am.  Avoid ignitions within 15 miles to the S through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the S through SW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  Recommend against burning units that will smolder significantly overnight.

Zone 633 - 638:
Delay ignitions until 11:00am.  Avoid ignitions within 15 miles to the S through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the S through SW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.

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