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: Tuesday, October 14, 2008       2:35 PM      Jim Little
 
1. DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638
 
Generally westerly flow across the Pacific and the western US will buckle a bit as a broad flat ridge moves over the area during the day tomorrow and Thursday.  Daytime heating should push afternoon mixing heights above 4000 feet during the afternoon for good plume development potential.  However, nighttime inversions will hold smoke close to the ground at night.  With the ridge, flat pressure gradients mean overnight smoke will follow drainages.  Thus avoid burning upstream of populated areas if you expect smoldering overnight. 
 
    OUTLOOK (THURSDAY - SATURDAY):
 
The upper level ridge pushes east by Saturday and a weakening cold front will move across the Pacific Northwest.  At this time it looks like only light amounts of moisture will make it east of the Cascades.  Cooler air aloft should destabilize the atmosphere and give higher mixing heights on Saturday.  
 

2.  DISPERSION
 
WEDNESDAY
 
Zone 630 and 632:
Mixing height below 500 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 3600 - 4600 ft 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 W to NW at 6 - 10 mph during the afternoon then becomes light and variable during the evening.
 
Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 6 - 10 mph during the afternoon then becomes light and variable during the evening.
 
Zone 633 - 638:
Mixing height below 500 ft early rising to 3000 - 4000 ft by late morning.  Afternoon mixing height rises to 3600 - 4600 ft then lowers below 1000 ft during the evening.
 
Transport wind WNW to NNW at 4 - 8 mph during the morning.  Transport wind increases to NW to NNW at 8 - 12 mph during the afternoon then decreases to WNW to NNW at 4 - 8 mph during the evening.
 
Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 6 - 10 mph during the afternoon then becomes light and variable during the evening.
 
OUTLOOK:
 
THURSDAY
Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind S to SW at 5 - 9 mph.  Surface wind light and variable.
 
FRIDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 2500 to 3500 ft during the afternoon.  Transport wind ESE to SSE at 8 - 12 mph.  Surface wind ESE to SSE at 8 - 12 mph.
 
SATURDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable during the morning becoming ESE to S at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming ESE to S at 6 - 12 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 Wednesday, October 15, 2008.
    ==================================================================
 
Zone 630 and 632:
Avoid ignitions within 15 miles in all directions 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 4pm  
 
Zone 633 - 638:
Avoid ignitions within 15 miles to the WNW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SW through N in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4pm  
 
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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: 
      www.odf.state.or.us/Divisions/protection/fire_protection/Smoke/Smkfcst.asp 
 
    Please ensure your units have been planned and accomplished by checking: 
      www.odf.state.or.us/Divisions/protection/fire_protection/smoke/burning.asp