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, May 29, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will remain in place through Saturday with the axis of the ridge near the Oregon/Idaho border.  Expect continued summer-like weather.  Air mass will remain stable except for brief afternoon instability inland due to daytime heating.  Some thunderstorm buildups will continue in the afternoon to evening - mainly to the south.  Wind flow will remain weak and favor generally a NW to N flow.  Smoke dispersion will remain poor to fair.

    OUTLOOK (SUNDAY - TUESDAY):

Upper level ridge starts weakening on Sunday as a trough moves down from the north and an upper low approaches from the southwest.  However, expect continued warm and dry conditions.  Thundershower threat will get pushed mainly southward.  Eventually the upper level low in the eastern Pacific and to the southwest of the state will move close enough to bring increased clouds and maybe some moisture over the region on Tuesday.  Wind flow will remain light and mostly northerly Sunday and Monday.  As the low approaches Tuesday, wind flow appears it will turn lightly offshore.  Smoke dispersion will remain poor to fair.

2.  DISPERSION

SATURDAY
Mixing height below 1000 ft early, rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NW to NNW at 8 - 12 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to NNW at 8 - 12 mph during the afternoon and evening.

OUTLOOK:

SUNDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4200 to 5000 ft during the afternoon.  Transport wind NW to N at 5 - 9 mph.  Surface wind light and variable during the morning becoming NW to N at 8 - 14 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind NNW to NNE at 6 - 10 mph.  Surface wind light and variable during the morning becoming NW to NNE at 5 - 9 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind NNE to ENE at 8 - 12 mph during the morning becoming NNW to NNE at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to NNE at 6 - 10 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, May 30, 2009.
    ==================================================================

Avoid ignitions within 15 miles to the W through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the W through NNE 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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20090529/3385fdae/attachment.html>