SMI Northeast (Smoke Management Instructions) Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, September 27, 2010       2:35 PM      Jim Little



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


High pressure remains over the region for fair skies and warm temperatures and relatively light winds aloft.  The high is centered to the south of the Pacific Northwest and to the west, over the ocean, flow is southwesterly.  Full sunshine will give warm afternoon temperatures which will push mixing heights high enough for generally good smoke dispersal conditions.
    EXTENDED OUTLOOK (WEDNESDAY - THURSDAY)
The ridge aloft builds Wednesday and mixing heights will decrease somewhat.  Smoke dispersal conditions remain fair to good, however.  On Thursday a disturbance embedded in the southwesterly flow aloft offshore turns higher level winds more southwesterly.  This should have little effect on weather in northeast Oregon. By Friday the disturbance is in Canada.  High pressure remains over the region for fair skies and above average temperatures.

2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height 1900 - 2900 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1400 - 2400 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 8 - 14 mph during the afternoon and increases to NNW to NNE at 10 - 20 mph during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 8 - 14 mph during the afternoon then decreases to NNW to NNE at 5 - 9 mph during the evening.



Zone 633 - 638:

Mixing height 2300 - 3300 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WNW to NNW at 6 - 12 mph during the afternoon then shifts to NNW to NNE at 8 - 12 mph during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NNW at 6 - 12 mph during the afternoon and evening.



OUTLOOK:



WEDNESDAY

Mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable during the morning becoming NNE to ENE at 4 - 8 mph during the afternoon.



THURSDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3400 to 4400 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph.  Surface wind SSE to SSW at 4 - 8 mph during the morning becoming NNW to NNE at 4 - 8 mph during the afternoon.



FRIDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph during the morning becoming WSW to WNW at 4 - 8 mph during the afternoon.  Surface wind NNW to NNE at 4 - 8 mph during the morning becoming WSW to WNW 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 Tuesday, September 28, 2010.

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



Zone 630 and 632:

Avoid ignitions within 15 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the NW through E in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.



Zone 633 - 638:

Avoid ignitions within 15 miles to the W through NE 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 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

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