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 2, 2009       2:35 PM      Jim Little

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

A very slow moving upper level low pressure area remains off the California coast on Wednesday.  Counter-clockwise flow around that low will again spread moisture northward into Oregon.  Daytime heating will destabilize the atmosphere and thunderstorms will again be a possibility.  Best chance afternoons and evenings over mountainous areas.  Low level flow will start out light and variable but becomes northerly during the afternoon.  Expect high mixing heights and generally good smoke dispersal conditions.

OUTLOOK (THURSDAY - SATURDAY)

The upper level low finally moves into California with flow aloft becoming more easterly or northeasterly over the state on Thursday.  The atmosphere will still be unstable and there will still be moisture available for thunderstorms.   Smoke dispersal conditions will be about the same as on Wednesday.  By Friday the upper low will be over central California with a dryer flow aloft.  The threat for afternoon and evening thunderstorms continues.  By Saturday upper flow goes more northerly.  The slow moving upper low drifts into Nevada and another upper low forms in Alberta.  The atmosphere will remain a bit unstable, but with diminished moisture the threat of thunderstorms decreases considerably but smoke dispersal conditions remain favorable.

2.  DISPERSION

WEDNESDAY

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 light and variable and controlled by local terrain during the morning.  Transport wind increases to N to NE at 10 - 18 mph during the afternoon and increases to NNE to NE at 13 - 25 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 6 - 12 mph during the afternoon and evening.

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 6 - 10 mph during the afternoon and increases to N to NE at 10 - 18 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 8 - 12 mph during the afternoon and evening.

OUTLOOK:

THURSDAY
Mixing height below 1000 ft early rising to 4100 to 5000 ft by late morning and through the afternoon.  Transport wind W to NW at 4 - 8 mph.  Surface wind light and variable during the morning becoming WNW to NW at 8 - 12 mph during the afternoon.

FRIDAY
Mixing height 3500 to 4500 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind NW to N at 10 - 16 mph during the morning becoming NW to N at 12 - 24 mph during the afternoon.  Surface wind NNW to NNE at 10 - 18 mph during the morning becoming NW to N at 13 - 25 mph during the afternoon.

SATURDAY
Mixing height 3500 to 4500 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind NW to NNW at 10 - 16 mph.  Surface wind NW to NNW at 10 - 16 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 Wednesday, June 3, 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 WNW 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 ESE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of 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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20090602/a6533c83/attachment.html>