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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: Sunday, April 26, 2009 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; "> </div>
<div style="padding-left: 36pt; ">Models show an upper short wave moving down from the north on Monday to keep the atmosphere a bit unstable. Moisture is limited but there is a good chance for some mainly afternoon showers. Mixing heights should be quite
high for good to excellent smoke dispersal conditions. Transport winds will be generally southwesterly.</div>
<div style="padding-left: 36pt; "> </div>
<div> OUTLOOK (TUESDAY - THURSDAY):</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">A second upper level short wave drops south on Tuesday eventually carving out an upper level low pressure area centered over Northwest Oregon. This will continue cool temperatures and snow levels could drop to around 3000
feet. The atmosphere will be unstable for good smoke dispersal conditions. Transport winds will be generally north-northwest. </div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">The upper low meanders ultimately splitting with a portion moving east and a portion retrograding to the west. Showers will end later Wednesday as the air mass stabilizes somewhat, but smoke dispersal conditions should remain
good. Transport winds will remain generally north-northwest.</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">By Thursday weak ridging aloft will again cover the Pacific Northwest. Mixing heights will remain favorable for good smoke dispersal and winds will be mostly from the north-northeast.</div>
<div> </div>
<div> </div>
<div>2. DISPERSION</div>
<div> </div>
<div>MONDAY</div>
<div> </div>
<div style="padding-left: 36pt; ">Zone 630 and 632:</div>
<div style="padding-left: 72pt; ">Mixing height 3900 - 4900 ft during the morning. Mixing height rises above 5000 ft during the afternoon and evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Transport wind light and variable and controlled by local terrain during the morning. Transport wind increases to NNW to NNE at 8 - 12 mph during the afternoon and evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Surface wind light and variable and controlled by local terrain during the morning. Surface wind increases to NNW to NE at 4 - 8 mph during the afternoon then shifts to WNW to NNW at 6 - 10 mph during the evening.</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">Zone 633 - 638:</div>
<div style="padding-left: 72pt; ">Mixing height above 5000 ft throughout the day. Mixing height lowers to 2500 - 3500 ft during the evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Transport wind SE to SSW at 4 - 8 mph throughout the morning and afternoon. Transport wind shifts to NNW to NNE at 8 - 12 mph during the evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Surface wind light and variable and controlled by local terrain during the morning. Surface wind increases to ENE to ESE at 4 - 8 mph during the afternoon then shifts to W to NW at 6 - 10 mph during the evening.</div>
<div style="padding-left: 36pt; "> </div>
<div>OUTLOOK:</div>
<div> </div>
<div style="padding-left: 36pt; ">TUESDAY</div>
<div style="padding-left: 36pt; ">In the west mixing height above 5000 ft throughout the day. In the east mixing height 3400 to 4400 ft during the morning rising above 5000 ft during the afternoon. Transport wind WNW to NW at 14 - 24 mph. Surface wind W
to NW at 5 - 9 mph during the morning becoming NW to NNW at 9 - 15 mph during the afternoon.</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">WEDNESDAY</div>
<div style="padding-left: 36pt; ">Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon. Transport wind NNW to NNE at 9 - 15 mph during the morning becoming NW to N at 12 - 24 mph during the afternoon. Surface wind NNW
to NNE at 10 - 16 mph during the morning becoming NW to N at 13 - 25 mph during the afternoon.</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">THURSDAY</div>
<div style="padding-left: 36pt; ">Mixing height 3800 to 4800 ft during the morning rising above 5000 ft during the afternoon. Transport wind NNW to NNE at 9 - 15 mph during the morning becoming light and variable during the afternoon. Surface wind NNW to
NNE at 10 - 16 mph during the morning becoming light and variable during the afternoon.</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 Monday, April 27, 2009.</div>
<div> ==================================================================</div>
<div> </div>
<div style="padding-left: 36pt; ">Zone 630 and 632:</div>
<div style="padding-left: 36pt; ">Avoid ignitions within 10 miles in all directions of SSRAs. No additional restrictions necessary. </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. Watch for shifting transport winds. 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"><font color="#0000FF"><u>http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management</u></font></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"><font color="#0000FF"><u>http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml</u></font></a> </div>
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