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, June 1, 2009       2:35 PM      Jim Little

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

Upper air forecast charts show a low continuing off the coast of California on Tuesday.  Counter-clockwise flow around that low will again bring moisture northward for areas of afternoon and evening thunderstorms.  Low level flow will be generally north-northwest to north-northeast.  Mixing heights will be high and smoke dispersal conditions should be good.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper level low moves a little closer to the California coastline Wednesday but the net change on Oregon will be nil.  Continued moisture and afternoon heating will pop thunderstorms again on Wednesday.  Low level winds will be generally northerly and smoke dispersal conditions will remain good.  On Thursday the upper low will move slightly south and upper flow over Oregon will begin to transition to northeasterly.  Thunderstorms will continue, but northern sections will be less vulnerable.  Transport winds will be variable.  The low moves to central California by Friday but thunderstorms will continue.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind N to NE at 6 - 10 mph during the morning.  Transport wind increases to NNE to ENE at 10 - 18 mph during the afternoon and evening.

Surface wind NNW to NE at 4 - 8 mph throughout the day.

Zone 633 - 638:
Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to N to NE at 9 - 15 mph during the afternoon then decreases to NNW to NNE at 6 - 10 mph during the evening.

Surface wind NNW to NNE at 8 - 12 mph.

OUTLOOK:

WEDNESDAY
Mixing height below 1000 ft early rising to 4400 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming N to NE at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 6 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height 1200 to 2200 ft during the morning rising to 3000 to 4000 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 Tuesday, June 2, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the N through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the N through ENE in or near drainages leading to SSRAs.  Complete ignitions by 4:00pm.

Zone 633 - 638:
Avoid ignitions within 12 miles to the NNW through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the NNW through E in or near drainages leading to SSRAs.  Complete ignitions by 4:00pm.

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