SMI South Central (Smoke Management Instructions) South Central 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       2:40 PM      Jim Little

1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625

    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
Mixing height 3800 - 4800 ft during the morning.  Mixing height rises above 5000 ft during the afternoon and evening.

Transport wind ESE to SSE at 9 - 15 mph during the morning.  Transport wind shifts to SSW to SW at 10 - 20 mph during the afternoon then increases to SW to W at 15 - 25 mph during the evening.

Surface wind ESE to SSE at 8 - 12 mph during the morning.  Surface wind shifts to SSW to SW at 9 - 15 mph during the afternoon and evening.

OUTLOOK:

WEDNESDAY
Mixing height 2800 - 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to WSW at 22 - 38 mph.  Surface wind SW to WSW at 12 - 24 mph during the morning becoming SW to W at 16 - 30 mph during the afternoon.

THURSDAY
Mixing height 3200 - 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height 3200 - 4200 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 ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Tuesday, June 8, 2010.
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Avoid ignitions within 10 miles to the ESE through W of SSRAs.  Watch for shifting transport winds.  No additional restrictions necessary.

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4.  SPECIAL NOTE:

    The smoke management forecaster is available at (503)
    945-7401.  The smoke management forecaster is available
    to discuss specific burns.  The duty forecaster phone
    number is (503) 945-7401. Please call this number and
    not individual's numbers to discuss daily burning. Please
    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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