SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions
ODF Smoke Management Instructions
smi_northeast at listsmart.osl.state.or.us
Tue Nov 23 14:33:01 PST 2010
SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY
ISSUED: Tuesday, November 23, 2010 2:35 PM Nick Yonker
1. DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638
Arctic air drove down from the north last night and early this morning and will set up shop for the next couple of days before gradually moderating. Air mass is moderately unstable today but as the surface temperatures cool tonight, strong temperature inversions will form and limit mixing overnight. As the upper ridge off the coast slowly moves in the air will slowly warm aloft. With chilly air near the surface, this will make for mostly poor mixing Wednesday. Wind flow will also be quite light under little pressure gradients. Thus smoke dispersion will be quite poor.
OUTLOOK (THURSDAY - SATURDAY):
A flattening upper level ridge builds in on Thanksgiving bringing warming temperatures aloft and near the surface. Another front will approach from the Pacific bringing increasing clouds overnight Thursday/Friday. Moisture will not likely begin until later Friday. Snow level will start out around 3000 - 4000 ft but lower to the surface in most locations on Saturday as the upper trough moves in. Air mass will remain stable through Friday before destabilizing on Saturday. Wind flow will increase from the S on Thursday, increase more on Friday, and then decrease and turn more SW to W on Saturday. Smoke dispersion will be poor Thursday, improving Friday, and good to excellent on Saturday.
Mixing height below 1000 ft early rising to 1000 - 1700 ft by late morning. Afternoon mixing height rises to 2000 - 3000 ft then lowers below 1000 ft during the evening.
Transport wind WSW to WNW at 5 - 9 mph.
Surface wind light and variable and controlled by local terrain.
Mixing height 1000 to 1700 ft during the morning rising to 2000 to 3000 ft during the afternoon. Transport wind S to SW at 6 - 12 mph. Surface wind light and variable during the morning becoming SSE to SW at 6 - 10 mph during the afternoon.
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2000 to 3000 ft during the afternoon. Transport wind SSW to SW at 12 - 22 mph. Surface wind SSE to SSW at 8 - 12 mph.
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 9 - 15 mph during the morning becoming WSW to WNW at 9 - 15 mph during the afternoon. Surface wind SSE to SW at 5 - 9 mph during the morning becoming SW to W at 6 - 10 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, November 24, 2010.
Delay ignitions until 10 a.m. Avoid ignitions within 15 miles to the SW through NW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSE through NW 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 3 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:
Please ensure your units have been planned and accomplished by checking:
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