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: Wednesday, November 18, 2009       2:35 PM      Nick Yonker

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

Minor upper level ridge has built over the region this afternoon following the cold front that passed through last evening.  This ridge will slip to the east tonight as a warm front approaches from the west.  The warm front will spread clouds over the area overnight and tomorrow but moisture will stay to the west.  This pattern is very similar to the one experienced Monday and Tuesday.  The front will stall and leave the region under cloudy and breezy conditions tomorrow.  After a stable early morning, the combination of warming temperatures and increasing wind will improve smoke dispersion considerably during the afternoon.

    OUTLOOK (FRIDAY - SUNDAY):

Warm front moves by to the north by Friday with the cold front and trough approaching Friday afternoon.  Moisture will be on the increase while the winds start to slacken.  Cold front moves through Friday evening with cold air following and lowering the snow level to near 3000 ft Friday night.  Upper level trough moves through early Saturday morning.  Another front and trough move in later Saturday with the trough passing through Sunday morning with a ridge following closely behind.  Expect good mixing and smoke dispersion through the period.

2.  DISPERSION

THURSDAY
Mixing height below 1000 ft early rising to 2800 - 3800 ft by late morning.  Afternoon mixing height rising to 3800 - 4800 ft and remaining the same through the evening.

Transport wind S to SSW at 16 - 28 mph during the morning.  Transport wind increases to SSE to SSW at 20 - 35 mph during the afternoon and evening.

Surface wind SSE to SSW at 10 - 16 mph during the morning.  Surface wind increases to SSE to S at 12 - 22 mph during the afternoon and evening.

OUTLOOK:

FRIDAY
Mixing height above 5000 ft throughout the day.  In the west transport wind S to SSW at 30 - 50 mph during the morning becoming SSW to SW at 18 - 32 mph during the afternoon.  In the east transport wind SSE to S at 24 - 42 mph during the morning becoming SSW to SW at 18 - 32 mph during the afternoon.  Surface wind SSE to SSW at 14 - 28 mph during the morning becoming SSW to SW at 12 - 22 mph during the afternoon.

SATURDAY
Mixing height above 5000 ft throughout the day.  Transport wind SW to WSW at 15 - 30 mph.  Surface wind SSW to SW at 9 - 15 mph.

SUNDAY
Mixing height above 5000 ft throughout the day.  Transport wind W to WNW at 18 - 32 mph during the morning becoming W to NW at 15 - 25 mph during the afternoon.  Surface wind W to WNW at 12 - 22 mph during the morning becoming SW to WSW at 10 - 16 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 Thursday, November 19, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the SSE through SSW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.

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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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