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: Wednesday, September 22, 2010       2:35 PM      Jim Little



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



    THURSDAY



A weak upper disturbance moves into British Columbia during the day.  This will support a weak Pacific cold front dragging into northwest Oregon during the day.  Any rain from this system will be confined to extreme northwestern Oregon and dry weather is expected for the northeast.  Winds will be southwesterly, becoming westerly during the day.  Smoke dispersal conditions will be good.





    OUTLOOK (FRIDAY-SUNDAY)



An upper level low settles into the Gulf of Alaska about 600 miles west of the Queen Charlotte Islands on Friday. Southwesterly flow aloft ahead of this system pumps up a ridge for the region.  This will give dry weather and mostly sunny skies to the area.  Winds under the ridge will be light (favoring southwesterly) but mixing heights should remain high. Saturday will see the ridge drift slightly east and the flow aloft will be more southerly but smoke dispersal conditions will only be fair.  Sunday the ridge moves farther east the flow aloft will be more southwesterly and smoke dispersal conditions will be good.



2.  DISPERSION



THURSDAY



Zone 630 and 632:

Mixing height 3200 - 4200 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 3000 - 4000 ft during the evening.



Transport wind SSW to WSW at 9 - 15 mph during the morning.  Transport wind shifts to WSW to WNW at 10 - 18 mph during the afternoon and evening.



Surface wind SSW to WSW at 8 - 12 mph during the morning.  Surface wind shifts to WSW to WNW at 9 - 15 mph during the afternoon then decreases to WNW to NNW at 5 - 9 mph during the evening.



Zone 633 - 638:

Mixing height 3800 - 4800 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.



Transport wind SSW to WSW at 9 - 15 mph during the morning.  Transport wind shifts to WSW to WNW at 9 - 15 mph during the afternoon then decreases to WNW to NNW at 5 - 9 mph during the evening.



Surface wind SSW to WSW at 8 - 14 mph during the morning.  Surface wind shifts to W to NW at 8 - 12 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



FRIDAY

Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.



SATURDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming ESE to S at 4 - 8 mph during the afternoon.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to S at 4 - 8 mph during the morning becoming SSW to WSW at 4 - 8 mph during the afternoon.  Surface wind SE to S at 4 - 8 mph during the morning becoming S to SW 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 Thursday, September 23, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the SSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Watch for shifting transport winds.



Zone 633 - 638:

Avoid ignitions within 12 miles to the SSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSW through NNW in or near drainages leading to SSRAs.  Complete ignitions by 4:00pm.



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

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


Nick Yonker
Meteorology Manager
Oregon Department of Forestry
503-945-7451
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