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

Fri Oct 9 14:32:23 PDT 2009

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

ISSUED: Friday, October 9, 2009       2:35 PM      Nick Yonker

****Due to the increase in fall burning, smoke management will begin staffing the office on weekends starting this Sunday.  Seven-day-a-week operations will continue until burning slows down later this fall.  Office hours will be from 6:30 a.m. to 5 p.m.  Our phone number for burning related questions is:  503-945-7401.****

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

Dry cold front is moving down from the north today and will bring cooler temperatures to the region this weekend.  Air mass will destabilize as the cooler air moves in aloft.  Expect variable clouds from the remainder of the cold front.  Wind flow will remain mostly northerly and smoke dispersion fair.

    OUTLOOK (SUNDAY - TUESDAY):

Northerly flow aloft weakens on Sunday as a weak ridge approaches ahead of an impressive eastern Pacific trough.  The ridge will move through Monday with the upper level trough approaching on Tuesday.  Front will move in Tuesday bringing rain into the region.  Wind flow will turn from northerly on Sunday to southerly on Monday and Tuesday.  Smoke dispersion will gradually improve through the period.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1800 - 2800 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNW to NNE at 8 - 12 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 6 - 10 mph during the afternoon then shifts to N to NE at 5 - 10 mph during the evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 3700 to 4700 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 8 - 14 mph.  Surface wind NNW to NNE at 6 - 10 mph.

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SE to S at 9 - 15 mph during the morning becoming SSE to SSW at 4 - 8 mph during the afternoon.  Surface wind ESE to S at 5 - 9 mph during the morning becoming light and variable during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SSE to S at 22 - 38 mph during the morning becoming SSE to SSW at 18 - 32 mph during the afternoon.  Surface wind SE to S at 12 - 22 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 Saturday, October 10, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the NW through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the NW through ENE in or near drainages leading to SSRAs.

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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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