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 21, 2010       2:35 PM      Pete Parsons



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


    SATURDAY

An unseasonably cold upper-level trough will bring numerous showers to central and northeastern Oregon.  There is also a chance of afternoon thunderstorms.  Elevations above 4000 feet may get a couple of inches of snow.  Once again, maximum temperatures will be 10-15 degrees below normal.  High mixing heights will provide good daytime smoke dispersal conditions.

    OUTLOOK (SUNDAY-TUESDAY)

The upper-level trough will slowly push east Sunday and Monday with a progressively drier, more stable, and warmer northwesterly flow aloft. Showers will taper off, from west to east, across the region. Temperatures will remain well below normal, with the snow level only lifting to around 6000 feet by Monday.  Clearing skies will allow morning inversions to form, but cool air aloft will help maintain high afternoon mixing heights with good daytime good smoke dispersal conditions. Clouds will increase Tuesday morning, with another Pacific storm coming onshore.  Showers will likely return by late Tuesday.


2.  DISPERSION



SATURDAY

Mixing height below 1500 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2200 - 3200 ft during the evening.



Transport wind W to WNW at 15 - 25 mph.



Surface wind WNW to NW at 10 - 16 mph.



OUTLOOK:



SUNDAY

Mixing height 1000 to 2000 ft during the early morning rising to about 4500 feet late morning and above 5000 ft during the afternoon.  Transport wind NW to N at 6 - 10 mph.  Surface wind NW to NNE at 6 - 10 mph.



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 WNW to NNW at 8 - 12 mph.  Surface wind WNW to NNW at 5 - 9 mph.



TUESDAY

Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to SSW at 10 - 18 mph during the morning becoming SSE to SSW at 15 - 29 mph during the afternoon.  Surface wind SE to S at 9 - 15 mph during the morning becoming S to SSW at 10 - 22 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 22, 2010.

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



Avoid ignitions within 10 miles to the WSW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the WSW through N in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



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

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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