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: Monday, April 6, 2009       2:35 PM      Jim Little

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

The upper level ridge that moved over the region over the weekend will flatten and move to the east while an upper level low pressure area will move into central California on Tuesday. At the surface a thermal trough will shift inland.  A wind shift line will move through northeast Oregon on Tuesday with a generally south-southeasterly flow shifting to northerly during the day.  Because of shifting winds recommend burning only units well away from populated areas.  Mixing heights should remain favorable for fair to good smoke dispersal conditions.

    OUTLOOK (WEDNESDAY - FRIDAY):

The California upper low will shift into Nevada and Utah on Wednesday.  Expect some light rain most areas with this system for Wednesday.  Another weather system will spread more rain in again for Thursday and Friday.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 2100 - 3100 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind ESE to SSE at 8 - 12 mph throughout the morning and afternoon.  Transport wind shifts to N to NE and increases to 10 - 22 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 4 - 8 mph during the afternoon then becomes light and variable during the evening.

Zone 633 - 638:
Mixing height 2400 - 3400 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers below 1000 ft during the evening.

Transport wind ESE to SSE at 6 - 12 mph throughout the day.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 5000 to 5000 ft by late morning and through the afternoon.  Transport wind NW to NNW at 10 - 20 mph during the morning becoming WNW to NW at 14 - 28 mph during the afternoon.  Surface wind SW to WNW at 4 - 8 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 5000 to 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning and through the afternoon.  Transport wind NNW to NNE at 10 - 18 mph during the morning becoming SW to W at 4 - 8 mph during the afternoon.  Surface wind NNW to NNE at 10 - 18 mph.

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 Tuesday, April 7, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles to the N through SSE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.

Zone 633 - 638:
Avoid ignitions within 15 miles to the E through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of 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


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