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: Wednesday, April 1, 2009       2:40 PM      Jim Little

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

A Pacific cold front will sweep across the state during the day Thursday.  This will bring rain and blustery winds to the region.  Transport winds should be generally westerly or west-northwesterly during the day.  Cold air aloft will push mixing heights up and smoke dispersal conditions should be good to excellent.

    OUTLOOK (FRIDAY - SUNDAY):

A few showers will linger behind the front for Friday, but should be tapering off during the day.  Transport winds will shift to generally northwesterly.  Higher pressure will build Friday night leading to dry weather but light transport winds for Saturday and Sunday.

2.  DISPERSION

THURSDAY
Mixing height above 5000 ft throughout the day.

Transport wind WSW to WNW at 20 - 36 mph during the morning and afternoon.  Transport wind increases to W to NW at 23 - 41 mph during the evening.

Surface wind SW to W at 10 - 22 mph during the morning.  Surface wind increases to W to WNW at 15 - 29 mph during the afternoon then decreases to WNW to NW at 10 - 16 mph during the evening.

OUTLOOK:

FRIDAY
Mixing height above 5000 ft throughout the day.  Transport wind NW to NNW at 18 - 32 mph.  Surface wind W to NW at 9 - 15 mph during the morning becoming WNW to NW at 12 - 24 mph during the afternoon.

SATURDAY
Mixing height 2800 - 3800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to S at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming SE to S at 9 - 15 mph during the afternoon.

SUNDAY
Mixing height 3500 - 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SE to S at 8 - 14 mph.  Surface wind SE to S at 10 - 20 mph.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Thursday, April 2, 2009.
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Avoid ignitions within 10 miles to the W through NW of SSRAs.  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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