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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, April 19, 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 style="padding-left: 36pt; ">Wednesday morning will see an upper level trough extending from the Gulf of Alaska southeastward to off the coast of California. The south end of this trough cuts off as a closed low over California during the day. A Pacific
cold front moves in early dropping temperatures and keeping rain and snow showers going throughout the day. Mixing heights will be quite high for good smoke dispersal conditions most areas. </div>
<div> </div>
<div> OUTLOOK (WEDNESDAY-FRIDAY)</div>
<div> </div>
<div style="padding-left: 36pt; ">An upper low over Nevada keeps circulating showers into the region on Wednesday. Maximum mixing heights drop to around 3000 for just fair smoke dispersal conditions. On Thursday the upper low drifts southward but showers
continue. Mixing heights drop for only marginal smoke dispersal conditions. Upper ridging develops over the Pacific Northwest on Friday for dry weather.</div>
<div> </div>
<div>2. DISPERSION</div>
<div> </div>
<div>TUESDAY</div>
<div> </div>
<div>Zone 630 and 632:</div>
<div>Mixing height 3400 - 4400 ft during the morning. Mixing height rises to above 5000 ft during the afternoon then lowers to 1700 - 2700 ft during the evening.</div>
<div> </div>
<div>Transport wind SSW to SW at 10 - 18 mph during the morning. Transport wind shifts to WNW to NNW and decreases to 8 - 12 mph during the afternoon then increases to NW to NNW at 12 - 24 mph during the evening.</div>
<div> </div>
<div>Surface wind SSW to SW at 8 - 14 mph during the morning. Surface wind shifts to WNW to NNW at 6 - 10 mph during the afternoon and evening.</div>
<div> </div>
<div>Zone 633 - 638:</div>
<div>Mixing height 3900 - 4900 ft during the morning. Mixing height rises to above 5000 ft during the afternoon then lowers to 1600 - 2600 ft during the evening.</div>
<div> </div>
<div>Transport wind SSE to SW at 5 - 9 mph during the morning. Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to NW to NNW at 12 - 24 mph during the evening.</div>
<div> </div>
<div>Surface wind S to SW at 5 - 9 mph during the morning. Surface wind becomes light and variable and controlled by local terrain during the afternoon then increases to NW to N at 10 - 20 mph during the evening.</div>
<div> </div>
<div>OUTLOOK:</div>
<div> </div>
<div>WEDNESDAY</div>
<div>In the west mixing height 1500 to 2500 ft during the morning rising to 2500 to 3500 ft during the afternoon. In the east mixing height 3100 to 4100 ft during the morning lowering to 2500 to 3500 ft during the afternoon. In the west transport wind NW
to NNW at 18 - 32 mph. In the east transport wind NW to N at 9 - 15 mph. In the west surface wind NW to NNW at 10 - 22 mph. In the east surface wind NW to N at 6 - 12 mph.</div>
<div> </div>
<div>THURSDAY</div>
<div>Mixing height 1200 to 2200 ft during the morning rising to 2000 to 3000 ft during the afternoon. Transport wind WNW to NNW at 4 - 8 mph. Surface wind light and variable during the morning becoming NW to N at 5 - 9 mph during the afternoon.</div>
<div> </div>
<div>FRIDAY</div>
<div>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 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, April 20, 2010.</div>
<div> ==================================================================</div>
<div> </div>
<div style="padding-left: 36pt; ">Zone 630 and 632:</div>
<div style="padding-left: 36pt; ">Avoid ignitions within 12 miles to the S through N of SSRAs. For units that will smolder significantly through the night avoid burning within at least 20 miles to the S through N in or near drainages leading to SSRAs. Watch
for shifting transport winds. </div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">Zone 633 - 638:</div>
<div style="padding-left: 36pt; ">Avoid ignitions within 10 miles in all directions of SSRAs. No additional restrictions necessary. </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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