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: Sunday, April 12, 2009       2:35 PM      Jim Little

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

The cold front moving through the region early Monday morning will usher in a cool upper level trough that will bring showers to the area throughout the day.  Snow level will be around 4500 ft.  Transport winds will be somewhat variable during the first half of the day but be generally west or west-southwesterly during the afternoon.  Mixing heights will be quite high for good to excellent smoke dispersal conditions.

    OUTLOOK (TUESDAY - THURSDAY):


Showers linger in the area through Wednesday.  By Thursday an upper-level ridge moves in from the west for drier weather but lowering mixing heights and deteriorating smoke dispersal conditions.


2.  DISPERSION

MONDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.

Transport wind SW to W at 10 - 20 mph during the morning.  Transport wind increases to W to WNW at 15 - 29 mph during the afternoon and evening.

Surface wind W to NW at 10 - 16 mph during the morning.  Surface wind increases to WNW to NNW at 12 - 24 mph during the afternoon then decreases to WNW to NNW at 10 - 18 mph during the evening.

Zone 633 - 638:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 3200 - 4200 ft during the evening.

Transport wind WSW to WNW at 8 - 12 mph during the morning.  Transport wind increases to W to WNW at 12 - 24 mph during the afternoon and evening.

Surface wind WNW to NNW at 9 - 15 mph during the morning.  Surface wind increases to NW to NNW at 10 - 22 mph during the afternoon and evening.

OUTLOOK:

TUESDAY
In the west mixing height above 5000 ft throughout the day.  In the east mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 12 - 22 mph.  Surface wind WNW to NNW at 10 - 16 mph.

WEDNESDAY
Mixing height above 5000 ft throughout the day.  Transport wind NNW to N at 19 - 33 mph.  Surface wind NNW to N at 19 - 33 mph.

THURSDAY
Mixing height 2500 to 3500 ft throughout the day.  Transport wind light and variable during the morning becoming NNW to NNE at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 8 - 12 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 Monday, April 13, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the SW through NW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.

Zone 633 - 638:
Avoid ignitions within 10 miles to the WSW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the WSW through NNW in or near drainages leading to 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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20090412/51c028cf/attachment.html>