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: Wednesday, June 30, 2010       2:35 PM      Jim Little

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

The persistent broad upper level trough that has been over the eastern Pacific and the Pacific Northwest will be reinforced by an upper short wave moving from the WNW across the Pacific Ocean.  This supports a weak front that will move into NW Oregon during the day on Thursday.  Moisture should hold off for this area until Friday. Temperatures will be on the order of 3 to 8 degrees below average and smoke dispersal conditions should be good.

    OUTLOOK (FRIDAY-SUNDAY)

Yet another upper short wave drops in to again reinforce the upper trough over the region early Friday. As this short wave moves to the east a cool northwesterly flow pattern aloft will set up.  Temperatures will remain cool: 10-15 degrees below average for the time of year.  Expect some scattered showers or possible afternoon thunderstorms.  By Saturday some minor ridging is evident in the eastern Pacific and this ridge builds to more significant proportions by Sunday.  This may eventually develop into a summertime ridge that finally brings significant warmth to the Pacific Northwest next week.  In the meantime expect morning clouds with partial afternoon clearing in the north, afternoon sunshine in the south.  The chance for some scattered mountain showers at least into Saturday.  Smoke dispersal conditions Saturday and Sunday will be good.

2.  DISPERSION

THURSDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 2500 - 3500 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WNW to NNW at 6 - 12 mph during the afternoon and increases to NNW to N at 12 - 22 mph during the 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.

Zone 633 - 638:
Mixing height 3800 - 4800 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1800 - 2800 ft during the evening.

Transport wind WSW to NW at 5 - 9 mph throughout the morning and afternoon.  Transport wind shifts to NNW to NNE at 9 - 15 mph during the evening.

Surface wind WSW to NW at 5 - 9 mph throughout the morning and afternoon.  Surface wind shifts to NNW to NNE at 8 - 14 mph during the evening.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising to 2600 to 3600 ft by late morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 5 - 9 mph during the morning becoming NW to NNW at 9 - 15 mph during the afternoon.  Surface wind WNW to NNW at 5 - 7 mph during the morning becoming NW to NNW at 8 - 14 mph during the afternoon.

SATURDAY
Mixing height 2800 to 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to N at 4 - 8 mph.  Surface wind NW to N at 4 - 8 mph.

SUNDAY
Mixing height 3000 to 4000 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 Thursday, July 1, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the WSW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the WSW through N in or near drainages leading to SSRAs.

Zone 633 - 638:
Avoid ignitions within 10 miles to the WSW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the WSW through NE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  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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