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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: Wednesday, May 19, 2010 2:40 PM Jim Little</div>
<div> </div>
<div>1. DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625</div>
<div> THURSDAY</div>
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<div style="padding-left: 36pt; ">A complex upper low pressure area continues in the Gulf of Alaska. A portion deepens and upper flow backs gradually from westerly to southwesterly by late in the day. Transport winds will be generally southwesterly through
northwesterly during the day. With continued cool air aloft (freezing level down to 3000 feet above sea level), mixing heights should be quite high for good smoke dispersal conditions. </div>
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<div> OUTLOOK (FRIDAY-SUNDAY) </div>
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<div style="padding-left: 36pt; ">The upper level low moves to off the Washington coast on Friday supporting another weak Pacific front. This will move into western Oregon early in the day then spread to north-central and north-east Oregon during the day.
On Saturday the upper level low drifts eastward with enough moisture to continue for scattered showers. By Sunday, as the upper low moves east of the area, upper level flow becomes dry northerly and the showers end for a generally dry day. Transport winds
will be mostly light and variable. Mixing heights should be high enough throughout the outlook period for fair to good smoke dispersal conditions. </div>
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<div>2. DISPERSION</div>
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<div>THURSDAY</div>
<div>Mixing height above 5000 ft during the morning and afternoon. Mixing height lowers below 1000 ft during the evening.</div>
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<div>Transport wind WSW to WNW at 8 - 14 mph during the morning and afternoon. Transport wind decreases to WSW to WNW at 8 - 12 mph during the evening.</div>
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<div>Surface wind WSW to WNW at 8 - 12 mph during the morning and afternoon. Surface wind decreases to WSW to WNW at 4 - 8 mph during the evening.</div>
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<div>OUTLOOK:</div>
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<div>FRIDAY</div>
<div>Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon. Transport wind WSW to WNW at 8 - 14 mph during the morning becoming W to WNW at 15 - 25 mph during the afternoon. Surface wind WSW to WNW at 6 - 12 mph
during the morning becoming W to WNW at 10 - 22 mph during the afternoon.</div>
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<div>SATURDAY</div>
<div>Mixing height 3500 - 4500 ft during the morning rising above 5000 ft during the afternoon. Transport wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon. Surface wind light and variable.</div>
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<div>SUNDAY</div>
<div>Mixing height 2800 - 3800 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 ZONES 624 AND 625 INCLUDING THE WALKER</div>
<div> RANGE PORTION OF ZONE 624</div>
<div>This instruction is valid for burning conducted on Thursday, May 20, 2010.</div>
<div>==================================================================</div>
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<div>Avoid ignitions within 12 miles to the SW through WNW 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. Complete ignitions by 4:00pm.
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<div>==============================================================</div>
<div>4. SPECIAL NOTE:</div>
<div> </div>
<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>
<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>
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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">http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml</a> </div>
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