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: Saturday, June 12, 2010       2:40 PM      Pete Parsons



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



    SUNDAY


The upper-level ridge axis is forecast to shift over the region by the afternoon.  Sunny skies will help temperatures climb a few degrees above normal with high afternoon mixing heights.  Northerly transport winds will increase during the late afternoon and evening, as cooler marine air begins pouring into the region.

    OUTLOOK (MONDAY-WEDNESDAY)

A cold front is forecast to sweep across the state Monday, as an upper-level trough swings onshore.  This system is fairly dry, but it should bring at least some clouds back into the region and shift the transport winds to onshore in the afternoon.  That will cool temperatures back to near normal.  Conditions may be unstable enough to produce an afternoon or evening shower or thunderstorm, mainly north.  Additional cooling is likely Tuesday and Wednesday, as an upper-level trough gets carved out over Oregon.  Skies will become at least partly cloudy with a chance of showers and afternoon thundershowers.  Daytime heating should continue to yield high afternoon mixing heights with transport winds turning more north to northeasterly by Wednesday.


2.  DISPERSION



SUNDAY

Mixing height below 1000 ft early rising to 3700 - 4700 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1500 - 2500 ft during the evening.



Transport wind N to NE at 4 - 8 mph during the morning and afternoon.  Transport wind increases to NNW to NNE at 9 - 15 mph during the evening.



Surface wind N to NE at 4 - 8 mph.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 4300 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NW at 12 - 22 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 10 - 20 mph during the afternoon.



TUESDAY

Mixing height 2500 - 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 4 - 8 mph.  Surface wind NNW to NNE at 4 - 8 mph.



WEDNESDAY

Mixing height 2500 - 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind N to NE at 12 - 22 mph.  Surface wind NNW to NNE at 8 - 12 mph during the morning becoming NNW to NNE at 10 - 20 mph during the afternoon.



3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Sunday, June 13, 2010.

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Avoid ignitions within 12 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the NW through NE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.



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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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