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: Saturday, May 8, 2010       2:35 PM      Pete Parsons



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


    SUNDAY

A split-flow jet stream pattern will send another upper-level trough across mainly the southern two-thirds of Oregon.  Skies should be partly cloudy with a chance of showers over mainly the southern zones.  Mixing should be good from the late morning through the afternoon, but light north to northwesterly transport winds could become variable.

   OUTLOOK (MONDAY-WEDNESDAY)

A cold upper-level trough will bring showery and cooler conditions on Monday.  Light snow accumulations are possible above 4-5000 feet.  Transport wind speeds should increase, from the northwest, in the afternoon. The flow aloft is forecast to become northerly Tuesday, as an upper-level ridge builds just offshore.  That should taper off the shower activity with northwesterly transport winds turning more northerly by Tuesday evening.  Wednesday looks dry with mostly north to northeasterly transport winds and good mixing heights.


2.  DISPERSION



SUNDAY



Zone 630 and 632:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 2000 - 3000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to W to NW at 5 - 9 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to W to NW at 6 - 10 mph during the afternoon and evening.



Zone 633 - 638:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1500 - 2500 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NNW to NNE at 4 - 8 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 4 - 8 mph during the afternoon and evening.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to WNW at 6 - 12 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon.  Surface wind SSW to W at 5 - 9 mph during the morning becoming WNW to NNW at 9 - 15 mph during the afternoon.



TUESDAY

Mixing height 1800 to 2800 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 18 - 32 mph during the morning becoming NNW to NNE at 18 - 32 mph during the afternoon.  Surface wind NW to NNW at 10 - 20 mph.



WEDNESDAY

Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NNE to ENE at 8 - 12 mph.  Surface wind NE to E at 6 - 10 mph during the morning becoming N to NE at 4 - 8 mph during the afternoon.



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 Sunday, May 9, 2010.

    ==================================================================



Zone 630 and 632:

Avoid ignitions within 10 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles in all directions of SSRAs.



Zone 633 - 638:

Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.



    =========================================================

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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