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: Friday, May 28, 2010       2:35 PM      Pete Parsons



PLEASE NOTE:  SMOKE MANAGEMENT FORECASTS WILL NOT BE ISSUED ON SUNDAY, MAY 30TH, IN HONOR OF MEMORIAL DAY, AND NO FORECASTER WILL BE AVAILABLE. SMOKE MANAGEMENT FORECASTS WILL RESUME ON MONDAY, MAY 31ST.



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


    SATURDAY

As a strong upper-level trough finally exits to the east, it will rotate one last disturbance southward across northeastern Oregon.  That will keep skies mostly cloudy with a chance of showers, mainly in zones 633-638. Skies will slowly clear, from west to east, during the afternoon, with locally brisk northwesterly winds ushering drier air across the region.  Temperatures will remain well below normal.  Daytime smoke dispersal conditions will be good, but evening clearing will allow low-level temperature inversions to trap residual smoke near the ground.

    OUTLOOK (SUNDAY-TUESDAY)


A weak and transitory upper-level ridge will bring partly cloudy and dry conditions Sunday.  Maximum temperatures will recover close to normal with fair to good afternoon smoke dispersal conditions.  A weak weather system, in a westerly flow aloft, will bring increasing clouds by late Sunday.  Skies will be with mostly cloudy Monday and Tuesday with cooling temperatures and a chance of showers, mainly over the northern mountains.  Daytime smoke dispersal conditions should remain fair to good.



2.  DISPERSION



SATURDAY



Zone 630 and 632:

Mixing height below 1500 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1000 - 2000 ft during the evening.



Transport wind W to NW at 9 - 15 mph.



Surface wind W to NW at 6 - 12 mph throughout the day.



Zone 633 - 638:

Mixing height below 2000 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 1000 - 2000 ft during the evening.



Transport wind WSW to WNW at 10 - 18 mph throughout the day.



Surface wind WSW to WNW at 8 - 12 mph.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 3800 to 4800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SSW to WSW at 4 - 8 mph during the afternoon.  Surface wind light and variable.



MONDAY

Mixing height 2100 to 3100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 6 - 10 mph during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.  Surface wind SSW to WSW at 4 - 8 mph during the morning becoming W to NW at 8 - 12 mph during the afternoon.



TUESDAY

Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 5 - 9 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 Saturday, May 29, 2010.

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



Zone 630 and 632:

Avoid ignitions within 15 miles to the W through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 5 p.m.



Zone 633 - 638:

Avoid ignitions within 15 miles to the WSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSW through NNW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 5 p.m.



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

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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