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, June 12, 2010       2:35 PM      Pete Parsons



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



    SUNDAY


A weak upper-level ridge axis is forecast to move over northeastern Oregon during the afternoon, in response to a mostly dry cold front pushing into the northern Cascades.  Temperatures will warm to slightly above normal with mostly sunny skies. Daytime heating will yield high afternoon mixing heights.  Northerly transport winds will increase and turn slightly more onshore late, as cooler marine air begins pouring into central and eastern Oregon.

    OUTLOOK (MONDAY-WEDNESDAY)

Strong onshore flow is forecast early in the period, as an upper-level trough comes onshore and stalls over Washington and Oregon.  On Monday, A cold front will bring increasing clouds and a slight chance of showers or afternoon thunderstorms.  Brisk onshore winds will usher cooler air, from west to east across the region.  Additional cooling is likely Tuesday and Wednesday, as the upper-level trough slowly shifts to over eastern Oregon.  This system is relatively dry, compared to the past several storms.  However, skies will become at least partly cloudy with a chance of showers and afternoon thundershowers.  Daytime heating should yield high afternoon mixing heights with transport winds turning more northerly on Wednesday.


2.  DISPERSION



SUNDAY

Mixing height below 1000 ft early rising to 4200 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1800 - 2800 ft during the evening.



Transport wind NNW to NNE at 5 - 9 mph during the morning and afternoon.  Transport wind increases to NNW to NNE at 10 - 18 mph during the evening.



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



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NNW to N at 12 - 24 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to N at 10 - 20 mph during the afternoon.



TUESDAY

Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WNW to NNW at 6 - 10 mph.  Surface wind WNW to NNW at 5 - 9 mph.



WEDNESDAY

Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 10 - 20 mph.  Surface wind NNW to NNE at 6 - 10 mph during the morning becoming NNW to NNE at 10 - 16 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, June 13, 2010.

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



Avoid ignitions within 10 miles to the NW through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the NW through NNE in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.



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

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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