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

Wed Nov 25 14:27:44 PST 2009

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

ISSUED: Wednesday, November 25, 2009       2:35 PM      Nick Yonker

****Due to the Thanksgiving Holiday, state furlough day, and the decrease in burning, the smoke management office will not be staffed from Thursday, Nov. 26th through Sunday, November 29th.  If you have questions about burning through the holiday weekend, please call 503-945-7401 before 5:00 p.m. today.  Forecasts and instructions will be issued Monday morning for burning on Nov. 30th.****

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

Upper level ridge will slide to the east tonight and give way to a frontal system that will slowly approach the region on Thanksgiving afternoon and evening.  Air mass will remain mostly stable but increasing southerly wind flow will improve smoke dispersion.

    OUTLOOK (FRIDAY - SUNDAY):

Cold front moves through early Friday morning with the upper level trough pushing through Friday afternoon.  Expect cool, showery, and unstable conditions as the snow level lowers to near the valley floors.  An upper ridge will then nose in on Saturday and strengthen on Sunday.  Expect good smoke dispersion Friday and Saturday, and then worsening dispersion on Sunday.

2.  DISPERSION

THURSDAY
Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.  Afternoon mixing height rises to 2500 - 3500 ft then lowers to 1800 - 2800 ft during the evening.

Transport wind S to SSW at 14 - 26 mph.

Surface wind SSE to SSW at 10 - 16 mph.

OUTLOOK:

FRIDAY
Mixing height 3000 to 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to W at 10 - 22 mph during the morning becoming NW to N at 12 - 24 mph during the afternoon.  Surface wind SW to W at 6 - 12 mph during the morning becoming NW to N at 8 - 14 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 6 - 10 mph.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.

SUNDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning and through the afternoon.  Transport wind WSW to WNW at 4 - 8 mph during the morning becoming SSE to SSW at 4 - 8 mph during the afternoon.  Surface wind light and variable.

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 26, 2009.
    ==================================================================

Avoid ignitions within 12 miles to the S through SW of SSRAs.  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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