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<div>SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS</div>
<div>SALEM FORESTRY WEATHER CENTER</div>
<div>OREGON DEPARTMENT OF FORESTRY</div>
<div> </div>
<div>ISSUED: Monday, May 17, 2010 2:35 PM Jim Little</div>
<div> </div>
<div>1. DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638</div>
<div> </div>
<div> TUESDAY</div>
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<div style="padding-left: 36pt; ">Weather maps show a large upper level low in the Gulf of Alaska with counter-clockwise flow around the low giving southerly winds aloft to the region. Warmer air with this southerly flow will suppress mixing heights somewhat
but there will be plenty of moisture for scattered showers. Expect maximum mixing heights generally around 4000 foot range for fair to good smoke dispersal conditions. Transport winds will be generally northwesterly.</div>
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<div> OUTLOOK (WEDNESDAY-FRIDAY) </div>
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<div style="padding-left: 36pt; ">A vigorous upper level disturbance rotates around the Gulf of Alaska low. This generates a strong surface low that moves northward off the coastline during the day. Rain from this system crosses the Cascades during the afternoon.
Thus expect dry weather early then significant (for this time of year) rainfall in the afternoon and evening. By Thursday the Gulf low splits and a portion moves to off Vancouver Island. This will continue to rotate enough moisture into the area for scattered
showers through Friday. Maximum mixing heights should be 5000 feet or above through the outlook period. </div>
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<div>2. DISPERSION</div>
<div> </div>
<div>TUESDAY</div>
<div> </div>
<div>Zone 630 and 632:</div>
<div>Mixing height below 500 ft early rising to 1800 - 2800 ft by late morning. Afternoon mixing height rises to 3500 - 4500 ft then lowers to 2000 - 3000 ft during the evening.</div>
<div> </div>
<div>Transport wind W to NW at 8 - 14 mph.</div>
<div> </div>
<div>Surface wind W to NW at 8 - 12 mph throughout the day.</div>
<div> </div>
<div>Zone 633 - 638:</div>
<div>Mixing height below 500 ft early rising above 5000 ft by late morning. Mixing height lowers to 3500 - 4500 ft during the afternoon and to 1400 - 2400 ft during the evening.</div>
<div> </div>
<div>Transport wind WSW to WNW at 10 - 16 mph during the morning. Transport wind decreases to WSW to NW at 6 - 12 mph during the afternoon and evening.</div>
<div> </div>
<div>Surface wind SW to WNW at 6 - 12 mph during the morning and afternoon. Surface wind becomes light and variable and controlled by local terrain during the evening.</div>
<div> </div>
<div>OUTLOOK:</div>
<div> </div>
<div>WEDNESDAY</div>
<div>Mixing height below 1000 ft early rising to 4400 to 5000 ft by late morning rising above 5000 ft during the afternoon. Transport wind S to SW at 8 - 14 mph during the morning becoming SSW to WSW at 10 - 22 mph during the afternoon. Surface wind SSE to
SW at 6 - 10 mph during the morning becoming SSW to WSW at 10 - 16 mph during the afternoon.</div>
<div> </div>
<div>THURSDAY</div>
<div>Mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon. Transport wind light and variable. Surface wind light and variable.</div>
<div> </div>
<div>FRIDAY</div>
<div>Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon. Transport wind light and variable. Surface wind light and variable.</div>
<div> </div>
<div>3. BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638</div>
<div> The following considerations should be adhered to in addition to</div>
<div> the requirements of the Oregon Smoke Management Plan. These</div>
<div> Instructions are valid for burning conducted on Tuesday, May 18, 2010.</div>
<div> ==================================================================</div>
<div> </div>
<div>Zone 630 and 632:</div>
<div>Avoid ignitions within 12 miles to the W 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. </div>
<div> </div>
<div>Zone 633 - 638:</div>
<div>Avoid ignitions within 12 miles to the WSW through NW of SSRAs. For units that will smolder significantly through the night avoid burning within at least 20 miles to the SW through NW in or near drainages leading to SSRAs. </div>
<div> </div>
<div> =========================================================</div>
<div>4. SPECIAL NOTE:</div>
<div> </div>
<div> The smoke management forecaster is available at (503)-</div>
<div> 945-7401. Please call this number and not individual's </div>
<div> numbers to discuss daily burning. For large burns (over</div>
<div> 2000 tons) or burns extending over a considerable period,</div>
<div> please request a special forecast. Avoid calling before</div>
<div> 8 a.m. and between 2 to 3 p.m.</div>
<div> </div>
<div> This forecast is available on the Internet at: </div>
<div> <a href="http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management">http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management</a> </div>
<div> </div>
<div> Please ensure your units have been planned and accomplished by checking: </div>
<div> <a href="http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml">http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml</a> </div>
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