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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 2:40 PM Jim Little</div>
<div> </div>
<div>1. DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625</div>
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<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 becoming more westerly later in the day.</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 southwesterly. </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 northerly.</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 northeast.</div>
<div>2. DISPERSION</div>
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<div style="padding-left: 36pt; ">MONDAY</div>
<div style="padding-left: 72pt; ">Mixing height 4000 - 5000 ft during the morning. Mixing height rises to above 5000 ft during the afternoon then lowers to 3600 - 4600 ft during the evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Transport wind SSW to WSW at 8 - 14 mph during the morning. Transport wind shifts to W to NW and increases to 10 - 22 mph during the afternoon and evening.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">Surface wind SW to W at 6 - 10 mph during the morning. Surface wind increases to WSW to WNW at 10 - 18 mph during the afternoon and evening.</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">OUTLOOK:</div>
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<div style="padding-left: 72pt; ">TUESDAY</div>
<div style="padding-left: 72pt; ">Mixing height above 5000 ft throughout the day. Transport wind W to NW at 10 - 22 mph. Surface wind SW to W at 6 - 12 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">WEDNESDAY</div>
<div style="padding-left: 72pt; ">Mixing height 3000 - 4000 ft during the morning rising above 5000 ft during the afternoon. Transport wind WNW to NNW at 5 - 9 mph during the morning becoming NW to NNW at 10 - 20 mph during the afternoon. Surface wind WNW
to NNW at 5 - 9 mph during the morning becoming NW to NNW at 10 - 18 mph during the afternoon.</div>
<div style="padding-left: 72pt; "> </div>
<div style="padding-left: 72pt; ">THURSDAY</div>
<div style="padding-left: 72pt; ">Mixing height 2500 - 3500 ft during the morning rising to 4000 - 5000 ft during the afternoon. Transport wind light and variable. Surface wind light and variable.</div>
<div style="padding-left: 36pt; "> </div>
<div>3. BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER</div>
<div> RANGE PORTION OF ZONE 624</div>
<div style="padding-left: 36pt; ">This instruction is valid for burning conducted on Monday, April 27, 2009.</div>
<div style="padding-left: 36pt; ">==================================================================</div>
<div style="padding-left: 36pt; "> </div>
<div style="padding-left: 36pt; ">Avoid ignitions within 10 miles to the SSW through NNW of SSRAs. Watch for shifting transport winds. No additional restrictions necessary. </div>
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<div style="padding-left: 36pt; ">==============================================================</div>
<div>4. SPECIAL NOTE:</div>
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<div> The smoke management forecaster is available at (503)</div>
<div> 945-7401. The smoke management forecaster is available </div>
<div> to discuss specific burns. The duty forecaster phone </div>
<div> number is (503) 945-7401. Please call this number and </div>
<div> not individual's numbers to discuss daily burning. Please</div>
<div> avoid calling before 8 a.m. and between 2 to 3 p.m. </div>
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<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>
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<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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