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: Thursday, November 19, 2009       2:35 PM      Nick Yonker

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

Warm front has pushed off to the northeast with the region in the warm sector of the frontal system.  Cold front will swing into the area Friday morning to afternoon.  Expect moisture to increase during the day.  Colder air will move in with the front, and the following trough.  Snow level will lower to 3000 ft by evening.  Air mass will remain mostly unstable and with decent wind flow, will make for excellent smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Trough exits to the east Saturday morning with a minor and transitory ridge moving in.  Next front and trough will race in from the Pacific Saturday with moisture increasing again during the late afternoon to evening.  Temperatures will moderate some with the snow level rising to 4000 - 5000 ft by Sunday morning.  A ridge will rebuild again late Sunday and Monday, but a warm front will ride through the ridge increasing clouds and the chance of moisture.  Overall, expect a very progressive weather pattern, keeping the air mass mostly unstable and dispersion good to excellent.

2.  DISPERSION

FRIDAY
Mixing height below 3000 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft and remains above 5000 ft through the evening.

Transport wind S to SSW at 20 - 35 mph during the morning.  Transport wind decreases to SW to WSW at 12 - 24 mph during the afternoon and evening.

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

OUTLOOK:

SATURDAY
Mixing height above 5000 ft throughout the day.  Transport wind SW to W at 12 - 24 mph during the morning becoming S to SSW at 20 - 35 mph during the afternoon.  Surface wind SW to W at 9 - 15 mph during the morning becoming S to SSW at 12 - 22 mph during the afternoon.

SUNDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  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.

MONDAY
Mixing height 1800 to 2800 ft throughout the day.  Transport wind SSW to SW at 22 - 38 mph during the morning becoming SSW to SW at 25 - 45 mph during the afternoon.  Surface wind SSW to SW at 12 - 24 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, November 20, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the S through WNW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  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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