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: Friday, November 20, 2009       2:35 PM      Nick Yonker

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

Cold front is moving through the region today and will move east of the region tonight.  Cold upper level trough will move through overnight and bring a few lingering showers.  Snow level will lower to the valley floors in most locations.  Next frontal system and trough race toward the region tomorrow with moisture beginning again by the evening.  Expect mostly unstable conditions and brisk wind flow, leading to excellent smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY):

Upper level trough will move through the state Sunday morning following Saturday night's front.  Upper level ridge will follow and bring mostly dry conditions through Tuesday.  After unstable conditions on Sunday, the air mass will stabilize through Tuesday.  Expect good to excellent smoke dispersion Sunday then deteriorating dispersion Monday and Tuesday.

2.  DISPERSION

SATURDAY
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 3200 - 4200 ft during the evening.

Transport wind SW to WSW at 10 - 18 mph during the morning.  Transport wind shifts to S to SSW and increases to 16 - 28 mph during the afternoon then increases to S to SSW at 20 - 35 mph during the evening.

Surface wind SW to WSW at 9 - 15 mph during the morning.  Surface wind shifts to S to SSW at 10 - 20 mph during the afternoon and evening.

OUTLOOK:

SUNDAY
Mixing height 4000 to 5000 ft during the morning rising above 5000 ft during the afternoon.  In the west transport wind WSW to W at 18 - 32 mph.  In the east transport wind SW to WSW at 15 - 25 mph during the morning becoming W to WNW at 14 - 28 mph during the afternoon.  Surface wind SW to W at 10 - 20 mph during the morning becoming W to NW at 10 - 18 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind S to SW at 8 - 12 mph.  Surface wind SSE to SW at 4 - 8 mph.

TUESDAY
Mixing height below 1000 ft early rising to 1000 to 1700 ft by late morning and through the afternoon.  Transport wind SSE to SW at 4 - 8 mph.  Surface wind light and variable during the morning becoming SE to S at 5 - 9 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 Saturday, November 21, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the S through WSW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  Watch for shifting transport winds.  No additional restrictions necessary.

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