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, June 15, 2010       2:35 PM      Jim Little

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

    WEDNESDAY

An upper level low pressure area continues to spin over the Pacific Northwest on Tuesday.  Skies will be mostly cloudy with a few showers.  Cooler air aloft will yield high afternoon mixing heights.  Smoke dispersal conditions will be good.  Transport winds will be generally north-northwest to northwest.

    OUTLOOK (THURSDAY-SATURDAY)

The upper level low dissipates Thursday but a broad trough remains over the region.  There will still be a few showers around especially during the afternoon and early evening hours.  Smoke dispersal conditions will be good most areas.  The trough remains for Friday but weakens and finally by Saturday weak ridging begins to build offshore.  Showers are still possible although moisture will be very limited.  High mixing heights should give good smoke dispersal conditions for the end of the week.

2.  DISPERSION

WEDNESDAY

Zone 630 and 632:
Mixing height 2000 - 3000 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1600 - 2600 ft during the evening.

Transport wind WNW to NNW at 12 - 22 mph during the morning.  Transport wind increases to WNW to NNW at 14 - 28 mph during the afternoon and evening.

Surface wind WNW to NNW at 10 - 18 mph during the morning and afternoon.  Surface wind decreases to WNW to NNW at 9 - 15 mph during the evening.

Zone 633 - 638:
Mixing height 1300 - 2300 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2200 - 3200 ft during the evening.

Transport wind WNW to NNW at 6 - 12 mph throughout the day.

Surface wind WNW to NNW at 6 - 12 mph.

OUTLOOK:

THURSDAY
Mixing height 2700 to 3700 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to WNW at 6 - 10 mph.  Surface wind SW to WNW at 5 - 9 mph.

FRIDAY
Mixing height 2800 to 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SATURDAY
Mixing height 2800 to 3800 ft during the morning rising above 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, June 16, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 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.

Zone 633 - 638:
Delay ignitions until 10:00am.  Avoid ignitions within 12 miles to the W through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the SW through NNW in or near drainages leading to 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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