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: Tuesday, October 6, 2009       2:35 PM      Jim Little

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

An upper level ridge axis will remain about 600 miles west of the coastline.  Clockwise flow around that ridge leaves the Pacific Northwest in a generally north or northwesterly flow pattern aloft.  Surface temperatures at the surface will be warm enough and temperatures aloft will be cool enough to provide high mixing heights and good smoke dispersal conditions.

OUTLOOK (THURSDAY-SATURDAY):

The pattern changes little for Thursday with northwesterly flow aloft over the region for dry weather.  By Friday the ridge axis moves a little closer and sharpens although it is still some 500 miles west of the coastline.  A pattern change begins on Saturday as the ridge weakens and splits.  This will eventually allow a Pacific system to undercut the ridge and bring rain to the region the first part of next week.

2.  DISPERSION

WEDNESDAY

Zone 630 and 632:
Mixing height 2200 - 3200 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2100 - 3100 ft during the evening.

Transport wind NW to N at 8 - 12 mph during the morning.  Transport wind increases to NNW to NNE at 12 - 22 mph during the afternoon and evening.

Surface wind NW to N at 6 - 12 mph during the morning.  Surface increases to NNW to NNE at 10 - 18 mph during the afternoon then shifts to N to ENE and decreases to 6 - 12 mph during the evening.

Zone 633 - 638:
Mixing height 2700 - 3700 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2000 - 3000 ft during the evening.

Transport wind WNW to NW at 9 - 15 mph during the morning.  Transport wind shifts to NNW to NNE and increases to 12 - 22 mph during the afternoon and evening.

Surface wind WNW to NW at 9 - 15 mph during the morning.  Surface wind shifts to NNW to NNE at 10 - 18 mph during the afternoon then shifts and decreases to NNW to NE at 5 - 9 mph during the evening.

OUTLOOK:

THURSDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNW to NE at 7 - 11 mph.  Surface wind light and variable during the morning becoming NW to N at 6 - 12 mph during the afternoon.

FRIDAY
Mixing height below 1000 ft early rising to 3400 to 4400 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SATURDAY
Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising to 4300 to 5000 ft during the afternoon.  Transport wind light and variable.  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 Wednesday, October 7, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the NW through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the NW through ENE in or near drainages leading to SSRAs.

Zone 633 - 638:
Avoid ignitions within 12 miles to the W through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the W through NE in or near drainages leading to SSRAs.  Watch for shifting transport winds.

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