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

Thu Dec 17 14:32:08 PST 2009

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

ISSUED: Thursday, December 17, 2009       2:35 PM      Nick Yonker

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

Upper level ridge is building over the region today as a warm front moves in from the coast.  Very little, if any, moisture is expected from the front.  Cold front will follow on Friday.  Again, moisture amounts will be minimal as the front dissipates as it moves in.  Front will do little damage to the upper ridge which will quickly pop up again Friday evening.  Air mass will remain mostly stable with fair smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Next warm front will move into the ridge Saturday afternoon and evening bringing some light moisture by nightfall.  Cold front and trough will approach on Sunday increasing the chance of moisture and increasing the wind.  The first cold front should move through early Monday morning with a second one moving in Monday night.  Air mass will be quite stable Saturday with poor smoke dispersion.  Mixing and dispersion improve Sunday and Monday.

2.  DISPERSION

FRIDAY
Mixing height 1200 - 2200 ft during the morning.  Afternoon mixing height rises to 2000 - 3000 ft then lowers to 1300 - 2300 ft during the evening.

Transport wind S to SSW at 10 - 22 mph.

Surface wind SSE to SSW at 8 - 12 mph.

OUTLOOK:

SATURDAY
Mixing height 1000 to 2000 ft during the morning rising to 2000 to 3000 ft during the afternoon.  Transport wind S to SW at 8 - 14 mph.  Surface wind SSE to SSW at 5 - 9 mph.

SUNDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph.  Surface wind SE to SSW at 6 - 10 mph.

MONDAY
Mixing height 3800 to 4800 ft throughout the day.  Transport wind S to SSW at 15 - 25 mph during the morning becoming S to SSW at 18 - 32 mph during the afternoon.  Surface wind SSE to SSW at 9 - 15 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 Friday, December 18, 2009.
    ==================================================================

Avoid ignitions within 15 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 25 miles to the SSE through SW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.

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