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 7, 2010       2:35 PM      Jim Little

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

    TUESDAY

Upper level flow over the region will be generally west-southwest ahead of an upper level low pressure area about 600 miles offshore.  Expect increasing high clouds from a weak warm front moving south to north over the region.  Transport winds will be generally southerly and mixing heights should be high enough to provide for good smoke dispersal conditions.

    OUTLOOK (WEDNESDAY-FRIDAY)

By Wednesday the upper level low will be about 100 miles west of Grays Harbor, Washington.  Upper level flow will be from the southwest with enough moisture for scattered showers.  The upper low moves across northern Washington on Thursday with an upper trough sweeping across Oregon.  This will keep showers going.  By Friday the trough will be on an axis from northern Idaho to central Nevada and moving east.  Flow aloft will be north or northeasterly.  There will still be enough moisture for widely scattered showers.  Maximum mixing heights should reach 5000 feet or above through the outlook period for good smoke dispersal conditions.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 2600 - 3600 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2500 - 3500 ft during the evening.

Transport wind SSE to SSW at 10 - 16 mph during the morning.  Transport wind increases to SSE to SSW at 12 - 22 mph during the afternoon and evening.

Surface wind SE to S at 8 - 14 mph during the morning and afternoon.  Surface wind decreases to ESE to S at 5 - 9 mph during the evening.

Zone 633 - 638:
Mixing height 3600 - 4600 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 SSE to SSW at 5 - 9 mph throughout the day.

Surface wind SE to SSW at 5 - 9 mph.

OUTLOOK:

WEDNESDAY
In the west mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 2100 to 3100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 10 - 22 mph during the morning becoming W to NW at 10 - 18 mph during the afternoon.  Surface wind SSW to SW at 7 - 13 mph during the morning becoming W to NW at 8 - 12 mph during the afternoon.

THURSDAY
Mixing height 4000 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 6 - 10 mph.  Surface wind SW to W at 4 - 8 mph.

FRIDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 4 - 8 mph.  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 8, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the SE through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the SE through WSW in or near drainages leading to SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
Avoid ignitions within 10 miles to the SE through SSW of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  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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